LOCAL CLIMATOLOGICAL DATA
Monthly Summary
December 2018
Station: KPWR Portsmouth, Virginia
Latitude: 36° 59' 09" N Longitude: 76° 33' 00" W Elevation (ground): 13 feet Time Zone: Eastern
+--+-------------------------------+----+---------+---------+--+-----------+--------------------+-----------------------------+------+
| | Temperature | |Deg. Days|Precip Ty| | Precip | Pressure | Wind |Solar |
| +------+------+------+------+---+ Hu-+----+----+1 fog | S+-----+-----+ Adj. to Sea Level +----+----+---+-------+-------+------+
| | M | M | A | | |mid-| H | C |2 hvy fog| n| | Ice +------+------+------+ Avg| Res|Res| Peak |2Minute| Mean |
| | a | i | v | | D | ity| e | o |3 thunder| o|Water| plts| | | | | | +---+---+---+---+ W |
| | x | n | e | | e | | a | o |4 ice plt| w| | | | | | S | S | | S | | S | | a |
| D| i | i | r | M | w | M | t | l |5 hail | | E | S | | | M | p | p | | p | | p | | t |
| a| m | m | a | e | | e | i | i |6 glaze | C| q | n | M | M | e | e | e | D | e | D | e | D | t |
| t| u | u | g | a | P | a | n | n |7 duststm| v| u | o | a | i | a | e | e | i | e | i | e | i | s |
| e| m | m | e | n | t | n | g | g |8 smk, hz| r| v | w | x | n | n | d | d | r | d | r | d | r | m^2 |
| | | | | | | | | |9 blw snw| | | | | | | | | | | | | | |
| 1| 2 | 3 | 4A | 4B | 5 | 6 | 7 | 8 | 9 |10| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18| 19| 20| 21| 22| 23 |
+--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+
|01| 59.3 | 48.0 | 53.7 | 53.2 | 50| 89| 11| 0|1........| 0| 0.10| 0.0| 30.15| 29.89|30.064| 5.0| 3.2|109| 18|SSE| 0| 0| |
|02| 70.2*| 59.2 | 64.7*| 65.2 | 64| 97| 0| 0|1........| 0| 0.06| 0.0| 29.84| 29.67|29.741| 8.2| 7.7|194| 26| S| 0| 0| |
|03| 68.1 | 49.6 | 58.8 | 61.6 | 53| 77| 6| 0|.........| 0| 0.00| 0.0| 29.86| 29.71|29.760| 5.9| 4.0|254| 26|WSW| 0| 0| |
|04| 49.6 | 42.9 | 46.3 | 45.7 | 36| 69| 18| 0|.........| 0| 0.00| 0.0| 30.07| 29.86|29.994| 6.9| 5.7| 7| 25|NNW| 0| 0| |
|05| 43.0 | 31.0 | 37.0 | 38.7 | 34| 83| 28| 0|1........| 0| 0.11| T | 30.25| 30.02|30.089| 5.1| 3.8|316| 18|NNW| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|06| 45.1 | 28.3 | 36.7*| 35.6 | 30| 82| 28| 0|1........| 0| 0.00| 0.0| 30.38| 30.26|30.306| 2.5| 2.4|248| 19|WSW| 0| 0| |
|07| 46.5 | 32.8 | 39.7 | 39.6 | 33| 77| 25| 0|1........| 0| 0.00| 0.0| 30.44| 30.28|30.375| 4.0| 1.7| 35| 21|ENE| 0| 0| |
|08| 43.8 | 31.8 | 37.8 | 38.4 | 29| 70| 27| 0|.........| 0| 0.00| 0.0| 30.53| 30.43|30.481| 5.7| 5.5| 51| 19| NE| 0| 0| |
|09| 43.4 | 37.4 | 40.4 | 40.1 | 37| 89| 25| 0|1........| 0| 1.48| 0.0| 30.48| 29.93|30.188|12.6|12.5| 47| 46| NE| 0| 0| |
|10| 41.4 | 37.1 | 39.3 | 38.9 | 35| 87| 26| 0|1..4.....| 0| 0.10| T | 30.13| 29.93|30.039|12.3|10.9|360| 31| NE| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|11| 44.8 | 30.8 | 37.8 | 38.3 | 32| 79| 27| 0|.........| 0| 0.00| 0.0| 30.15| 30.04|30.085| 7.5| 6.0|324| 22| N| 0| 0| |
|12| 46.9 | 28.5 | 37.7 | 37.7 | 30| 75| 27| 0|.........| 0| 0.00| 0.0| 30.23| 30.06|30.181| 3.7| 0.9|177| 17| NW| 0| 0| |
|13| 57.0 | 31.2 | 44.1 | 43.2 | 38| 82| 21| 0|.........| 0| 0.00| 0.0| 30.36| 30.21|30.293| 2.5| 2.0|180| 20| S| 0| 0| |
|14| 58.8 | 34.1 | 46.4 | 47.5 | 46| 93| 18| 0|1........| 0| 0.09| 0.0| 30.39| 30.05|30.266| 3.4| 2.6| 82| 19| SE| 0| 0| |
|15| 66.8 | 56.4 | 61.6 | 61.7 | 62| 100| 3| 0|12.......| 0| 0.76| 0.0| 30.01| 29.85|29.904| 4.6| 2.8|189| 21| SE| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|16| 56.4 | 45.2 | 50.8 | 51.0 | 49| 94| 14| 0|1........| 0| 0.01| 0.0| 29.92| 29.77|29.854| 7.7| 6.3|265| 23| SW| 0| 0| |
|17| 57.3 | 37.8 | 47.5 | 47.7 | 41| 79| 17| 0|.........| 0| 0.00| 0.0| 29.95| 29.84|29.900| 6.5| 4.7|275| 22|NNW| 0| 0| |
|18| 46.0 | 31.4 | 38.7 | 41.0 | 31| 69| 26| 0|.........| 0| 0.00| 0.0| 30.20| 29.97|30.113| 5.9| 5.6|337| 25|NNW| 0| 0| |
|19| 49.9 | 28.1*| 39.0 | 38.2 | 33| 83| 26| 0|.........| 0| 0.00| 0.0| 30.22| 30.08|30.158| 2.0| 1.9|176| 14| S| 0| 0| |
|20| 65.9 | 40.5 | 53.2 | 55.6 | 55| 97| 11| 0|1........| 0| 0.71| 0.0| 30.07| 29.50|29.855| 7.7| 6.3|141| 29|SSE| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|21| 69.0 | 55.0 | 62.0 | 63.4 | 59| 87| 3| 0|.........| 0| 0.12| 0.0| 29.48| 29.25|29.350|11.8|11.3|187| 41| S| 0| 0| |
|22| 55.8 | 41.0 | 48.4 | 49.9 | 41| 73| 16| 0|.........| 0| 0.01| 0.0| 30.11| 29.34|29.797| 8.7| 8.4|263| 27| SW| 0| 0| |
|23| 52.6 | 32.8 | 42.7 | 43.0 | 38| 83| 22| 0|.........| 0| T | 0.0| 30.22| 30.01|30.128| 3.8| 3.6|170| 16|SSE| 0| 0| |
|24| 51.3 | 34.1 | 42.7 | 44.9 | 38| 77| 22| 0|.........| 0| 0.00| 0.0| 30.24| 30.00|30.144| 6.7| 5.4|296| 23|WNW| 0| 0| |
|25| 45.7 | 28.8 | 37.3 | 36.6 | 31| 81| 27| 0|.........| 0| 0.00| 0.0| 30.39| 30.23|30.332| 2.0| 2.0| 66| 16|ENE| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|26| 45.4 | 28.6 | 37.0 | 35.9 | 29| 77| 28| 0|.........| 0| 0.00| 0.0| 30.55| 30.40|30.502| 2.7| 2.6| 55| 19| NE| 0| 0| |
|27| 55.3 | 28.8 | 42.0 | 43.7 | 39| 84| 23| 0|.........| 0| 0.00| 0.0| 30.58| 30.31|30.477| 4.0| 3.2|112| 19| E| 0| 0| |
|28| 68.9 | 55.3 | 62.1 | 62.6 | 61| 94| 3| 0|1........| 0| 0.77| 0.0| 30.29| 29.94|30.069|12.1|11.6|176| 41| S| 0| 0| |
|29| 64.3 | 48.2 | 56.3 | 57.7 | 53| 86| 9| 0|.........| 0| 0.00| 0.0| 30.20| 29.96|30.089| 6.3| 4.1|271| 22| W| 0| 0| |
|30| 52.7 | 43.8 | 48.3 | 48.1 | 44| 84| 16| 0|.........| 0| T | 0.0| 30.25| 30.13|30.202| 4.5| 3.3| 62| 16| S| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|31| 66.3 | 42.4 | 54.4 | 53.0 | 53| 98| 11| 0|1........| 0| 0.05| 0.0| 30.27| 29.94|30.145| 4.8| 4.3|180| 25|SSW| 0| 0| |
+--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+
| Sum | Sum |------|------|---|----| Ttl| Ttl| |Total|Total| For the month: | ---- |
+------+------+------+------+---+----+----+----+ Number of +-----+-----+------+------+------+----+----+---+---+---+---+---+------+
|1687.5|1200.9|------|------|---|----| 564| 0| Days | 4.37| T | 30.58| 29.25|30.093| 6.0| 0.4|241| 46| NE| 0| 0| ---- |
+------+------+------+------+---+----+----+----+------------|+1.04" or 131% of normal-+------+----+----+---+---+---+---+---+------+
| Avg | Avg | Avg | Mean |Avg| Avg|----|----|Precip | Season Ttl| Date | Date |------|----|----|---| Date | Date | Avg |
+------+------+------+------+---+----+----+----+ +-----+-----+------+------+------+----+----+---+-------+-------+------+
| 54.4| 38.7| 46.5 | 47.0 | 42|83.6|----|----|≥.01 Inch 13|60.71| T | 27 | 21 |------|----|----|---| 9 | 1+ | |
+ +1.1° +2.5° +1.8° +---+----+----+----+------------|+10.08" or 120% of normal ------+----+----+---+-------+-------+------+
| | Season |Snow, Ice | | |
| Number of Days | to Date |≥1.0 Inch 0| Greatest in 24 Hours and Dates | Greatest Depth on Ground |
+------------------+-----------------+----+----+------------+--------------+-----------------+ of Snow, Ice Pellets or Ice |
| Max Temperature | Min Temperature |1135|2336|Thunder 0|Precipitation | Snow, Ice Plts | and Date |
+--------+---------+--------+--------+----+----+------------+-------+------+---------+-------+-------------+----------------------+
| ≥90°F | ≤32°F | ≤32°F | ≤0°F |----|----|Heavy Fog 1| 1.55| 9-10| T | 5+ | 0 | - |
+--------+---------+--------+--------+----+----+------------+-------+------+---------+----+--+-------------+----------------------+
| 0 | 0 | 11 | 0 |----|----| Clear 13 Partly Cloudy 6 Cloudy 12 |
+--------+---------+--------+--------+----+----+------------------------------------------+
NOTES:
Data in column 4A are (MAX+MIN) / 2, whereas data in columns 4B, 5, 6, 15, 16, 23 are means via continuous observations
Units are: Temperature=°F, Wind=mph, Pressure=Inches Hg, Precipitation=inches.
for 24 hours.
Column 5: Dew point is calculated from temperature and humidity and is continuously averaged for 24 hours.
Columns 7, 8: Degree Days heating base is 65°F, cooling base is 65°F.
Data in columns 9, 10, 12 are entered manually by the station observer.
Columns 17-18: Resultant wind is calculated by the vector sum of continuous wind observations.
Column 23: Solar Radiation is measured in Watts/m^2 and is continuously averaged for 24 hours.
Data in columns 4B, 5, 6, 15, 16, 23 are updated continuously, there by achieving a "true" mean.
OBSERVER NOTES:
FROPA: 3, 5 (trough),7,15 (occluded),16,17,22,24,28(warmfropa),28,29,30,31
FROST: 6, 7, 8,11,12,13,14,19,23,24,25,26,27
STATION RECORDS:
2nd - TEMPERATURE Maximum Low 59° [previous 58° 1991]
5th - SNOWFALL TRACE [previous, none on this date to 1976]
10th - SNOW (ice pellets) TRACE [previous, no frozen precip in database on this date to 1976]
15th - TEMP Max Low 56° [previous 53° 2008]
21st - TEMP MaxLow 55° [previous 54° 1998]
21st - WIND GUST 41 mph [prev 39mph 2012]
MONTHLY AVERAGE MAXIMUM TEMP OF 54.4° WAS 1.1° ABOVE NORMAL
MONTHLY AVERAGE MINIMUM TEMP OF 38.7° WAS 2.5° ABOVE NORMAL
MONTHLY AVERAGE TEMPERATURE OF 46.5° WAS 1.8° ABOVE NORMAL
MAXIMUM TEMP: 70° ON THE 2nd
MINIMUM TEMP: 28° ON THE 6th, 12th, 19th
DAYS WITH TEMPERATURES:
MAXIMUM >= 90°: 0
MAXIMUM <= 32°: 0
MINIMUM <= 32°: 11
MINIMUM <= 0°: 0
HEATING DEGREE DAYS: 572.0
COOLING DEGREE DAYS: 0.0
DAYS WITH HEATING DEGREE DAYS: 31
DAYS WITH COOLING DEGREE DAYS: 0
PRECIP TOTAL OF 4.37" WAS 1.04" ABOVE NORMAL ( 131% OF NORMAL )
GREATEST DAILY RAINFALL: 1.48" on the 9th
GREATEST 24-HOUR RAINFALL: 1.55" on the 9th - 10th
DAYS WITH MEASUREABLE PRECIP: 13 OF 31 DAYS OR 41.94%
AVERAGE DAILY PRECIP: 0.14"
NORMAL DAILY PRECIP: 0.11"
DAYS WITH PRECIP >= 0.01" 13
DAYS WITH PRECIP >= 0.10" 8
DAYS WITH PRECIP >= 0.50" 4
DAYS WITH PRECIP >= 1.00" 1
DAYS WITH THUNDERSTORMS: 0
NUMBER OF THUNDERSTORMS: 0
DAYS WITH SNOW: 1 (PLUS 1 DAY WITH ICE PELLETS BUT NO SNOW)
SNOWFALL TOTAL: TRACE
SEASONAL SNOWFALL 2018-2019 (beginning November 2018): TRACE
CLOUDY DAYS: 12
PARTLY CLOUDY DAYS 6
SUNNY/CLEAR DAYS: 13
DAYS WITH F/GF: 13
DAYS WITH DENSE FOG: 0
DAYS WITH FROST: 13
YEAR-TO-DATE
YEARLY AVERAGE MAXIMUM TEMP OF 71.2° WAS 1.4° ABOVE NORMAL
YEARLY AVERAGE MINIMUM TEMP OF 53.5° WAS 1.9° ABOVE NORMAL
YEARLY AVERAGE TEMPERATURE OF 62.4° WAS 1.7° ABOVE NORMAL
MAXIMUM TEMP: 99° on June 19th
MINIMUM TEMP: 7° on January 6th
DAYS WITH TEMPERATURES:
MAXIMUM >= 90°: 61
MAXIMUM <= 32°: 7
MINIMUM <= 32°: 49
MINIMUM <= 0°: 0
HEATING DEGREE DAYS: 3241.5
COOLING DEGREE DAYS: 2281.5
DAYS WITH HEATING DEGREE DAYS: 184
DAYS WITH COOLING DEGREE DAYS: 179
PRECIP TOTAL OF 60.71" WAS 10.08" ABOVE NORMAL (120% OF NORMAL).
GREATEST DAILY RAINFALL: 4.13" on September 8th
GREATEST 24-HOUR RAINFALL: 4.83" on September 8th - 9th
DAYS WITH MEASUREABLE PRECIP: 147 of 365 or 40.27%
AVERAGE DAILY PRECIP: 0.17"
NORMAL DAILY PRECIP: 0.14"
DAYS WITH PRECIP >= 0.01" 147
DAYS WITH PRECIP >= 0.10" 94
DAYS WITH PRECIP >= 0.50" 41
DAYS WITH PRECIP >= 1.00" 18
DAYS WITH THUNDERSTORMS: 28
NUMBER OF THUNDERSTORMS: 28
DAYS WITH SNOW (calendar year 2018): 8
SNOWFALL TOTAL (calendar year 2018): 16.4"
SEASONAL SNOW 2018-2019 (beginning November 2018): TRACE
CLOUDY DAYS: 88
PARTLY CLOUDY DAYS: 117
SUNNY/CLEAR DAYS: 160
DAYS WITH F/GF: 126
DAYS WITH DENSE FOG: 2
DAYS WITH FROST: 50
OBSERVATIONS AT 3-HOUR INTERVALS
December 2018: KPWR Portsmouth, Virginia
+--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+
| | | | | | | | | | | | | | | | | | | | | | |
| | | | | T | | | Wind | | | | T | | | Wind | | | | T | | | Wind |
| | | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+
| | | | a | m | D | | D| | | | | a | m | D | | D| | | | | a | m | D | | D| | |
| | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | |
| | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | |
| | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | |
| | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | |
| H| h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G |
| o| i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u |
| u| n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s |
| r| e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t |
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 1 | DEC 2 | DEC 3 |
| | | |
|01| |30.09| 0.00| 50| 46| 87|04| 5| 11| |29.84| 0.00| 60| 60|100|15| 10| 19| |29.71| 0.00| 67| 66| 97|22| 7| 18|
|04| |30.10| 0.00| 49| 45| 86|04| 6| 13| |29.78| 0.00| 62| 62|100|18| 11| 26| |29.71| 0.00| 64| 63| 97|22| 6| 16|
|07| |30.14| 0.00| 48| 42| 78|06| 6| 13| |29.76| 0.00| 63| 63|100|18| 5| 14| |29.75| 0.00| 60| 59| 98|22| 5| 13|
|10| |30.15| 0.00| 51| 47| 87|06| 5| 13| |29.79| 0.00| 65| 65|100|22| 7| 18| |29.78| 0.00| 63| 58| 83|27| 7| 18|
|13| |30.09| 0.00| 57| 52| 83|15| 6| 14| |29.74| 0.00| 67| 66| 97|20| 7| 21| |29.74| 0.00| 68| 51| 54|27| 10| 17|
|16| |30.03| 0.00| 57| 53| 87|15| 5| 13| |29.69| 0.00| 70| 67| 90|20| 7| 18| |29.73| 0.00| 66| 48| 52|29| 5| 14|
|19| |30.02| 0.01| 55| 54| 97|18| 0| 7| |29.67| 0.00| 67| 64| 93|20| 7| 21| |29.78| 0.00| 57| 45| 65|27| 4| 10|
|22| |29.94| 0.00| 57| 56| 99|13| 5| 14| |29.70| 0.01| 67| 66| 96|22| 10| 20| |29.83| 0.00| 52| 44| 72|24| 6| 26|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 4 | DEC 5 | DEC 6 |
| | | |
|01| |29.86| 0.00| 49| 43| 79|33| 5| 14| |30.06| 0.00| 42| 31| 63|33| 6| 18| |30.26| 0.00| 31| 30| 95|24| 4| 10|
|04| |29.90| 0.00| 44| 41| 88|33| 0| 5| |30.02| 0.00| 41| 32| 69|33| 5| 13| |30.28| 0.00| 31| 30| 96|24| 0| 5|
|07| |29.98| 0.00| 45| 37| 73|33| 10| 20| |30.03| 0.00| 40| 34| 77|04| 4| 6| |30.33| 0.00| 29| 28| 96|24| 0| 5|
|10| |30.04| 0.00| 46| 35| 65|33| 13| 25| |30.05| 0.00| 43| 35| 73|31| 5| 13| |30.38| 0.00| 35| 32| 92|27| 5| 12|
|13| |30.00| 0.00| 48| 35| 60|04| 11| 19| |30.04| 0.01| 37| 35| 92|31| 6| 13| |30.29| 0.00| 43| 30| 60|22| 6| 15|
|16| |30.01| 0.00| 46| 34| 61|04| 7| 18| |30.08| 0.00| 38| 36| 92|29| 6| 14| |30.28| 0.00| 45| 31| 58|22| 6| 18|
|19| |30.03| 0.00| 45| 32| 60|04| 6| 15| |30.16| 0.00| 37| 34| 89|31| 7| 17| |30.31| 0.00| 38| 31| 78|27| 0| 4|
|22| |30.06| 0.00| 44| 34| 67|06| 5| 12| |30.22| 0.00| 34| 32| 93|29| 5| 7| |30.30| 0.00| 35| 30| 82|22| 0| 6|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 7 | DEC 8 | DEC 9 |
| | | |
|01| |30.28| 0.00| 34| 30| 85|22| 4| 7| |30.43| 0.00| 32| 30| 90|04| 0| 6| |30.48| 0.00| 38| 26| 62|06| 10| 18|
|04| |30.30| 0.00| 36| 31| 81|22| 4| 7| |30.43| 0.00| 33| 30| 92|02| 0| 4| |30.43| 0.00| 38| 29| 70|04| 7| 16|
|07| |30.35| 0.00| 37| 33| 84|24| 0| 6| |30.47| 0.00| 35| 30| 80|04| 4| 6| |30.37| 0.00| 39| 33| 80|04| 7| 18|
|10| |30.41| 0.00| 43| 33| 67|29| 5| 14| |30.53| 0.00| 41| 26| 54|04| 10| 18| |30.31| 0.06| 39| 37| 95|04| 7| 17|
|13| |30.39| 0.00| 46| 36| 67|06| 10| 21| |30.47| 0.00| 44| 29| 56|06| 7| 16| |30.15| 0.11| 41| 40| 96|04| 12| 21|
|16| |30.39| 0.00| 45| 35| 69|06| 7| 15| |30.48| 0.00| 42| 31| 66|06| 5| 10| |30.03| 0.11| 42| 41| 97|04| 17| 34|
|19| |30.41| 0.00| 41| 34| 77|04| 5| 12| |30.48| 0.00| 40| 30| 67|04| 7| 16| |30.00| 0.07| 42| 41| 98|04| 18| 36|
|22| |30.43| 0.00| 35| 31| 84|04| 0| 4| |30.51| 0.00| 40| 28| 62|04| 10| 19| |29.93| 0.04| 43| 42| 98|04| 17| 33|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 10 | DEC 11 | DEC 12 |
| | | |
|01| |29.93| 0.03| 41| 41| 98|04| 14| 29| |30.11| 0.00| 39| 34| 82|00| 10| 22| |30.06| 0.00| 32| 27| 84|24| 4| 13|
|04| |29.94| 0.01| 41| 40| 96|04| 14| 30| |30.10| 0.00| 38| 33| 84|33| 11| 19| |30.12| 0.00| 29| 26| 86|27| 0| 5|
|07| |29.98| 0.01| 39| 36| 90|33| 12| 26| |30.11| 0.00| 37| 33| 88|33| 7| 15| |30.18| 0.00| 29| 27| 90|27| 0| 5|
|10| |30.05| 0.02| 38| 33| 85|04| 13| 28| |30.15| 0.00| 39| 34| 80|33| 11| 19| |30.22| 0.00| 38| 32| 80|22| 4| 10|
|13| |30.03| 0.00| 39| 35| 86|33| 14| 28| |30.05| 0.00| 43| 35| 72|33| 10| 17| |30.17| 0.00| 46| 30| 52|06| 6| 13|
|16| |30.07| 0.00| 38| 35| 87|33| 12| 23| |30.05| 0.00| 44| 32| 62|31| 7| 17| |30.19| 0.00| 46| 31| 55|06| 4| 10|
|19| |30.11| 0.00| 38| 33| 82|33| 11| 21| |30.07| 0.00| 36| 29| 76|27| 0| 5| |30.22| 0.00| 41| 34| 76|15| 5| 13|
|22| |30.13| 0.00| 38| 34| 84|33| 10| 18| |30.06| 0.00| 32| 28| 86|22| 5| 10| |30.23| 0.00| 39| 33| 78|18| 5| 14|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 13 | DEC 14 | DEC 15 |
| | | |
|01| |30.21| 0.00| 34| 31| 89|15| 5| 11| |30.35| 0.00| 40| 37| 90|06| 0| 4| |30.01| 0.09| 59| 59| 99|13| 7| 17|
|04| |30.22| 0.00| 32| 30| 93|18| 4| 6| |30.33| 0.00| 37| 35| 94|06| 0| 5| |29.92| 0.05| 62| 62|100|13| 6| 14|
|07| |30.27| 0.00| 31| 30| 95|18| 0| 4| |30.39| 0.00| 34| 33| 96|33| 0| 5| |29.93| 0.00| 60| 60|100|15| 4| 7|
|10| |30.31| 0.00| 45| 41| 87|18| 5| 12| |30.36| 0.00| 47| 46| 95|06| 6| 14| |29.95| 0.07| 64| 64|100|18| 6| 14|
|13| |30.27| 0.00| 55| 42| 61|18| 10| 20| |30.27| 0.00| 56| 50| 80|06| 5| 10| |29.87| 0.01| 67| 67|100|20| 4| 10|
|16| |30.30| 0.00| 54| 43| 67|33| 5| 11| |30.23| 0.00| 52| 50| 90|06| 6| 12| |29.86| 0.00| 66| 66| 99|18| 0| 13|
|19| |30.34| 0.00| 48| 42| 79|06| 0| 5| |30.19| 0.01| 54| 53| 97|06| 4| 6| |29.88| 0.06| 59| 59| 99|31| 4| 7|
|22| |30.35| 0.00| 45| 41| 87|06| 0| 4| |30.11| 0.01| 57| 56| 97|13| 5| 14| |29.85| 0.01| 59| 59|100|22| 4| 11|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 16 | DEC 17 | DEC 18 |
| | | |
|01| |29.86| 0.00| 55| 54| 99|22| 7| 19| |29.92| 0.00| 45| 42| 88|31| 10| 19| |29.97| 0.00| 44| 36| 73|04| 6| 17|
|04| |29.87| 0.00| 52| 52| 98|22| 6| 18| |29.92| 0.00| 43| 40| 90|27| 5| 13| |30.01| 0.00| 42| 33| 69|33| 10| 19|
|07| |29.86| 0.00| 49| 49| 98|22| 5| 13| |29.92| 0.00| 38| 37| 95|24| 4| 7| |30.08| 0.00| 40| 31| 70|33| 11| 23|
|10| |29.84| 0.00| 52| 52| 98|22| 6| 16| |29.95| 0.00| 46| 44| 92|24| 7| 18| |30.16| 0.00| 43| 30| 60|33| 12| 25|
|13| |29.78| 0.00| 53| 51| 92|22| 7| 23| |29.86| 0.00| 55| 47| 74|27| 7| 17| |30.12| 0.00| 45| 29| 54|33| 11| 19|
|16| |29.80| 0.00| 52| 49| 89|27| 11| 22| |29.84| 0.00| 57| 42| 57|24| 7| 20| |30.14| 0.00| 46| 29| 52|31| 7| 15|
|19| |29.87| 0.00| 50| 47| 91|29| 10| 20| |29.87| 0.00| 50| 42| 75|22| 4| 7| |30.17| 0.00| 38| 31| 75|00| 0| 6|
|22| |29.92| 0.00| 46| 43| 89|31| 11| 20| |29.90| 0.00| 49| 40| 70|31| 7| 16| |30.20| 0.00| 34| 30| 87|00| 0| 4|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
MAXIMUM SHORT DURATION PRECIPITATION
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
| Time Period (minutes) | 5 | 10 | 15 | 20 | 30 | 45 | 60 | 80 | 100 | 120 | 150 | 180 |
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
| Precipitation | 0.05 | 0.09 | 0.13 | 0.17 | 0.26 | 0.38 | 0.51 | 0.55 | 0.59 | 0.63 | 0.64 | 0.65 |
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
| Ended: Date | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
| Ended: Time | 1804 | 1809 | 1814 | 1819 | 1830 | 1844 | 1900 | 1900 | 1900 | 1900 | 1920 | 1940 |
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
The precipitation amounts for the indicated time intervals may occur at any time during the month. The time indicated
is the ending time of the interval. Date and time are not entered for trace amounts.
OBSERVATIONS AT 3-HOUR INTERVALS
December 2018: KPWR Portsmouth, Virginia
+--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+
| | | | | | | | | | | | | | | | | | | | | | |
| | | | | T | | | Wind | | | | T | | | Wind | | | | T | | | Wind |
| | | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+
| | | | a | m | D | | D| | | | | a | m | D | | D| | | | | a | m | D | | D| | |
| | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | |
| | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | |
| | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | |
| | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | |
| H| h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G |
| o| i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u |
| u| n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s |
| r| e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t |
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 19 | DEC 20 | DEC 21 |
| | | |
|01| |30.20| 0.00| 31| 28| 91|27| 0| 5| |30.07| 0.00| 42| 40| 93|13| 0| 6| |29.46| 0.02| 67| 67|100|18| 17| 41|
|04| |30.20| 0.00| 29| 27| 93|24| 0| 4| |30.03| 0.00| 47| 44| 87|06| 5| 13| |29.44| 0.00| 66| 66| 99|18| 12| 26|
|07| |30.21| 0.00| 28| 27| 94|00| 0| 0| |30.01| 0.00| 50| 47| 91|06| 5| 12| |29.44| 0.02| 62| 61| 97|18| 12| 24|
|10| |30.22| 0.00| 38| 37| 94|18| 4| 7| |29.98| 0.00| 54| 54|100|18| 4| 10| |29.40| 0.00| 62| 62| 99|15| 10| 17|
|13| |30.14| 0.00| 48| 37| 64|18| 6| 14| |29.88| 0.08| 61| 61|100|13| 5| 11| |29.27| 0.00| 69| 65| 87|18| 13| 24|
|16| |30.10| 0.00| 49| 36| 61|18| 6| 13| |29.80| 0.00| 61| 61| 99|13| 7| 15| |29.25| 0.00| 67| 55| 66|20| 13| 27|
|19| |30.12| 0.00| 41| 35| 81|15| 4| 6| |29.70| 0.15| 62| 62|100|15| 14| 25| |29.26| 0.00| 62| 52| 70|18| 12| 29|
|22| |30.11| 0.00| 39| 37| 91|15| 0| 6| |29.58| 0.05| 63| 63|100|15| 14| 27| |29.31| 0.00| 57| 51| 80|20| 11| 27|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 22 | DEC 23 | DEC 24 |
| | | |
|01| |29.34| 0.00| 54| 50| 85|22| 12| 27| |30.11| 0.00| 39| 35| 84|29| 0| 5| |30.00| 0.00| 47| 42| 84|18| 6| 12|
|04| |29.50| 0.00| 49| 43| 81|27| 11| 22| |30.12| 0.00| 35| 33| 91|27| 0| 5| |30.02| 0.00| 47| 42| 83|27| 11| 22|
|07| |29.64| 0.00| 47| 40| 76|27| 10| 19| |30.19| 0.00| 33| 31| 93|29| 0| 5| |30.11| 0.00| 43| 40| 90|29| 7| 19|
|10| |29.79| 0.00| 51| 42| 71|27| 11| 24| |30.22| 0.00| 44| 40| 88|15| 5| 11| |30.20| 0.00| 46| 40| 79|31| 10| 19|
|13| |29.83| 0.00| 55| 41| 59|27| 12| 25| |30.15| 0.00| 51| 41| 70|18| 5| 14| |30.15| 0.00| 50| 40| 68|31| 10| 20|
|16| |29.92| 0.00| 55| 41| 59|27| 10| 19| |30.10| 0.00| 52| 39| 61|15| 6| 13| |30.15| 0.00| 51| 36| 57|29| 10| 20|
|19| |30.01| 0.00| 48| 39| 70|27| 4| 7| |30.09| 0.00| 45| 40| 84|18| 6| 13| |30.20| 0.00| 43| 33| 67|33| 4| 10|
|22| |30.08| 0.00| 43| 37| 82|22| 4| 11| |30.06| 0.00| 46| 41| 85|15| 5| 12| |30.23| 0.00| 37| 31| 79|24| 4| 6|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 25 | DEC 26 | DEC 27 |
| | | |
|01| |30.23| 0.00| 33| 30| 88|24| 0| 4| |30.40| 0.00| 31| 29| 92|06| 0| 4| |30.53| 0.00| 30| 27| 88|09| 0| 4|
|04| |30.26| 0.00| 30| 28| 91|24| 0| 4| |30.43| 0.00| 30| 28| 94|06| 0| 5| |30.52| 0.00| 29| 27| 92|09| 0| 4|
|07| |30.34| 0.00| 29| 27| 94|18| 0| 6| |30.49| 0.00| 29| 28| 95|06| 0| 4| |30.55| 0.00| 29| 28| 94|09| 0| 4|
|10| |30.37| 0.00| 42| 34| 73|06| 6| 16| |30.55| 0.00| 41| 32| 70|04| 7| 17| |30.58| 0.00| 47| 42| 85|09| 6| 15|
|13| |30.32| 0.00| 45| 33| 64|06| 6| 13| |30.51| 0.00| 45| 29| 53|06| 7| 16| |30.49| 0.00| 54| 40| 58|15| 7| 17|
|16| |30.34| 0.00| 46| 34| 63|04| 4| 11| |30.51| 0.00| 45| 28| 52|04| 6| 14| |30.45| 0.00| 52| 44| 75|09| 5| 13|
|19| |30.36| 0.00| 39| 33| 78|06| 0| 5| |30.53| 0.00| 37| 28| 70|09| 0| 5| |30.42| 0.00| 50| 46| 86|09| 5| 12|
|22| |30.38| 0.00| 34| 30| 88|06| 0| 4| |30.55| 0.00| 33| 28| 83|09| 0| 4| |30.34| 0.00| 53| 51| 91|15| 6| 16|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 28 | DEC 29 | DEC 30 |
| | | |
|01| |30.29| 0.00| 56| 53| 88|15| 10| 16| |29.96| 0.00| 61| 61|100|22| 6| 19| |30.20| 0.00| 47| 41| 77|04| 7| 15|
|04| |30.20| 0.00| 60| 56| 87|15| 14| 28| |29.98| 0.00| 59| 59| 99|24| 7| 18| |30.16| 0.00| 47| 42| 85|04| 5| 13|
|07| |30.14| 0.01| 60| 59| 97|15| 14| 25| |30.04| 0.00| 56| 56| 98|27| 5| 12| |30.17| 0.00| 47| 43| 88|18| 6| 16|
|10| |30.12| 0.00| 68| 64| 89|18| 16| 32| |30.11| 0.00| 59| 56| 90|24| 10| 19| |30.24| 0.00| 49| 44| 85|04| 6| 15|
|13| |30.00| 0.07| 66| 64| 95|18| 15| 31| |30.07| 0.00| 63| 54| 72|27| 11| 22| |30.17| 0.00| 51| 45| 79|06| 5| 11|
|16| |29.97| 0.00| 67| 65| 96|18| 16| 35| |30.11| 0.00| 63| 54| 72|27| 6| 14| |30.18| 0.00| 51| 45| 79|06| 6| 15|
|19| |29.98| 0.50| 62| 61| 97|15| 5| 15| |30.17| 0.00| 53| 48| 83|33| 5| 10| |30.22| 0.00| 48| 44| 87|13| 5| 11|
|22| |29.99| 0.00| 61| 60| 99|22| 5| 11| |30.19| 0.00| 50| 43| 77|04| 5| 10| |30.25| 0.00| 47| 45| 92|06| 0| 5|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 31 | | |
| | | |
|01| |30.24| 0.00| 43| 42| 95|09| 0| 5| | |
|04| |30.25| 0.00| 43| 42| 97|09| 0| 5| | |
|07| |30.25| 0.00| 45| 44| 99|09| 0| 6| | |
|10| |30.25| 0.00| 51| 50| 99|15| 4| 7| | |
|13| |30.13| 0.00| 56| 56| 97|15| 5| 11| | |
|16| |30.08| 0.00| 59| 58| 98|18| 6| 11| | |
|19| |30.06| 0.00| 59| 58| 98|18| 7| 17| | |
|22| |30.00| 0.00| 65| 65| 99|20| 11| 25| | |
+--+----+-----+-----+---+---+---+--+---+---+---------------------------------------+---------------------------------------+
WEATHER NOTES SUMMARY BY HOURS
+--+-----------------------------+---------+
Wind Direction: Directions are those from which the wind is blowing, | | Averages | |
indicated in tens of degrees from true North: i.e., 09 for East, 18 for | +----+------+---+---+---+-----+Resultant|
South, 27 for West, and 00 or 36 for North. | | | | | | | | |
Wind Speed: The observed one-minute average speed in miles-per-hour. | | | | T | | | | Wind |
Wind Gust: The maximum instantaneous wind speed for the ten minute-period | | | | e | | % | W +----+----+
preceding the observation. | | | | m | D | | i | D | |
Rainfall Rate: The instantaneous rainfall rate at time of observation, | | S | P | p | e | H | n | i | |
calculated by timing consecutive 0.01" pulses from the electronic rain | | u | r | e | w | u | d | r | |
gauge and interpolating this rate for one hour. | | n | e | r | | m | | e | |
| | s | s | a | P | i | S | c | S |
| H| h | s | t | o | d | p | t | p |
| o| i | u | u | i | i | e | i | e |
| u| n | r | r | n | t | e | o | e |
| r| e | e | e | t | y | d | n | d |
+--+----+------+---+---+---+-----+----+----+
|01| |30.080| 44| 41| 88| 5.5| 18 | 0.8|
|04| |30.080| 43| 40| 89| 5.2| 24 | 0.7|
|07| |30.113| 42| 40| 90| 4.6| 29 | 0.7|
|10| |30.144| 48| 43| 84| 7.5| 30 | 0.8|
|13| |30.080| 52| 44| 74| 8.3| 22 | 0.5|
|16| |30.070| 52| 43| 73| 7.3| 27 | 0.6|
|19| |30.087| 48| 42| 82| 5.3| 12 | 0.4|
|22| |30.089| 46| 42| 86| 5.5| 21 | 1.1|
+--+----+------+---+---+---+-----+----+----+
HOURLY PRECIPITATION (Water Equivalent)
December 2018: KPWR Portsmouth, Virginia
---+-----------------------------------------------------------+-----------------------------------------------------------+---
| | |
D| A.M. Hour Ending at | P.M. Hour Ending at |D
a| | |a
t+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+t
e| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |e
---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
01| | | | | | | | | | | | | | | | |0.02|0.04|0.01| |0.01| |0.01|0.01|01
02| |0.03|0.02| | | | | | | | | | | | | | | | | | |0.01| | |02
03| | | | | | | | | | | | | | | | | | | | | | | | |03
04| | | | | | | | | | | | | | | | | | | | | | | | |04
05| | | | | | | | | | |0.02|0.06|0.01|0.02| | | | | | | | | | |05
| | | | | | | | | | | | | | | | | | | | | | | | |
06| | | | | | | | | | | | | | | | | | | | | | | | |06
07| | | | | | | | | | | | | | | | | | | | | | | | |07
08| | | | | | | | | | | | | | | | | | | | | | | | |08
09| | | | | | | |0.02|0.03|0.06|0.13|0.07|0.11|0.13|0.08|0.11|0.14|0.09|0.07|0.24|0.08|0.04|0.05|0.03|09
10|0.03|0.01| |0.01| |0.01|0.01|0.01| |0.02| | | | | | | | | | | | | | |10
| | | | | | | | | | | | | | | | | | | | | | | | |
11| | | | | | | | | | | | | | | | | | | | | | | | |11
12| | | | | | | | | | | | | | | | | | | | | | | | |12
13| | | | | | | | | | | | | | | | | | | | | | | | |13
14| | | | | | | | | | | | | | | | | | |0.01| | |0.01|0.03|0.04|14
15|0.09|0.32|0.03|0.05| | | | |0.02|0.07|0.01| |0.01| |0.01| |0.01| |0.06|0.04|0.03|0.01| | |15
| | | | | | | | | | | | | | | | | | | | | | | | |
16| | | | | | | | | | | |0.01| | | | | | | | | | | | |16
17| | | | | | | | | | | | | | | | | | | | | | | | |17
18| | | | | | | | | | | | | | | | | | | | | | | | |18
19| | | | | | | | | | | | | | | | | | | | | | | | |19
20| | | | | | | |0.08|0.05| | |0.06|0.08|0.12| | |0.01|0.02|0.15|0.01| |0.05|0.04|0.04|20
| | | | | | | | | | | | | | | | | | | | | | | | |
21|0.02|0.01| | | |0.01|0.02|0.05|0.01| | | | | | | | | | | | | | | |21
22| |0.01| | | | | | | | | | | | | | | | | | | | | | |22
23| | | | | | | | | | | | | | | | | | | | | | | | |23
24| | | | | | | | | | | | | | | | | | | | | | | | |24
25| | | | | | | | | | | | | | | | | | | | | | | | |25
| | | | | | | | | | | | | | | | | | | | | | | | |
26| | | | | | | | | | | | | | | | | | | | | | | | |26
27| | | | | | | | | | | | | | | | | | | | | | | | |27
28| | | | |0.01| |0.01| | | | | |0.07|0.01|0.01| | |0.12|0.50|0.03| | |0.01| |28
29| | | | | | | | | | | | | | | | | | | | | | | | |29
30| | | | | | | | | | | | | | | | | | | | | | | | |30
31| | | | | | | | | | | |0.02| |0.02|0.01| | | | | | | | | |31
---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
Sum|0.14|0.38|0.05|0.06|0.01|0.02|0.04|0.16|0.11|0.15|0.16|0.22|0.28|0.30|0.11|0.11|0.18|0.27|0.80|0.32|0.12|0.12|0.14|0.12|Sum
---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
During a frozen precipitation event, hourly precipitation totals may not be recorded. In this case, daily amounts are
typically entered in the last column (hour ending at 12 A.M.)
METEOROLOGICAL DATA FOR 2018
KPWR Portsmouth, Virginia
Latitude: 36° 59' 09" N Longitude: 76° 33' 00" W Elevation: 13 ft Time Zone: Eastern
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
| | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | Year|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|TEMPERATURE | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Daily Maximum | 46.9| 61.5| 53.8| 69.4| 83.6| 88.2| 88.0| 89.8| 86.2| 72.8| 59.3| 54.4| 71.2|
| -Daily Minimum | 28.0| 40.8| 38.3| 47.2| 64.7| 69.7| 71.0| 72.2| 71.7| 56.0| 43.3| 38.7| 53.5|
| -Monthly | 37.4| 51.2| 46.1| 58.3| 74.1| 79.0| 79.5| 81.0| 78.9| 64.4| 51.3| 46.6| 62.3|
| -Monthly Dewpt. | 29.4| 46.0| 35.9| 46.8| 66.6| 71.1| 72.9| 74.7| 74.1| 57.6| 45.8| 42.0| 55.2|
| Extremes | | | | | | | | | | | | | |
| -Highest | 73.2| 77.7| 82.1| 83.8| 93.4| 99.3| 97.6| 96.3| 92.4| 88.4| 80.6| 70.2| 99.3|
| -Date | 12| 24| 29| 14| 12| 19| 2| 30| 5| 4| 6| 2| JUN 19|
| -Lowest | 7.1| 22.8| 28.3| 37.0| 45.6| 60.9| 56.3| 60.2| 60.2| 38.9| 29.2| 28.1| 7.1|
| -Date | 6| 3| 17| 8| 1| 4| 10| 24| 29| 22| 29| 19| JAN 6|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|DEGREE DAYS | | | | | | | | | | | | | |
| Heating Base 65°F | 845| 392| 585| 224| 11| 0| 0| 0| 0| 153| 418| 564| 3192|
| | | | | | | | | | | | | | |
| Cooling Base 65°F | 1| 12| 6| 33| 304| 427| 458| 506| 428| 142| 19| 0| 2336|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|SOLAR RADIATION (W/m²) | | | | | | | | | | | | | |
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|NUMBER OF DAYS | | | | | | | | | | | | | |
| Sunrise to Sunset | | | | | | | | | | | | | |
| -Clear | 14| 6| 16| 12| 11| 16| 14| 15| 12| 16| 15| 13| 160|
| -Partly Cloudy | 8| 10| 4| 14| 9| 13| 12| 16| 12| 10| 3| 6| 117|
| -Cloudy | 9| 12| 11| 4| 11| 1| 5| 0| 6| 5| 12| 12| 88|
| | | | | | | | | | | | | | |
| Precipitation | | | | | | | | | | | | | |
| .01 inches or more | 10| 13| 9| 8| 17| 12| 14| 16| 13| 8| 14| 13| 147|
| | | | | | | | | | | | | | |
| Snow, Ice pellets | | | | | | | | | | | | | |
| 1.0 inches or more | 3| 0| 1| 0| 0| 0| 0| 0| 0| 0| 0| 0| 4|
| | | | | | | | | | | | | | |
| Thunderstorms | 0| 0| 0| 0| 2| 7| 8| 9| 2| 0| 0| 0| 28|
| | | | | | | | | | | | | | |
| Heavy Fog, visibility| | | | | | | | | | | | | |
| 1/4 mile or less | 0| 1| 0| 0| 0| 1| 0| 0| 0| 0| 0| 1| 3|
| | | | | | | | | | | | | | |
| Temperature | | | | | | | | | | | | | |
| -Maximum | | | | | | | | | | | | | |
| 90°F and above | 0| 0| 0| 0| 7| 15| 12| 18| 9| 0| 0| 0| 61|
| 32°F and below | 7| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 7|
| -Minimum | | | | | | | | | | | | | |
| 32°F and below | 21| 7| 6| 0| 0| 0| 0| 0| 0| 0| 3| 11| 48|
| 0°F and below | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|PRESSURE | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Monthly |30.232|30.245|29.959|30.001|30.029|29.920|30.029|30.028|30.074|30.056|30.071|30.093| 30.061|
| Extremes | | | | | | | | | | | | | |
| -Highest | 30.72| 30.75| 30.63| 30.46| 30.23| 30.19| 30.27| 30.23| 30.31| 30.41| 30.55| 30.58| 30.75|
| -Date | 26| 13| 26| 21| 2| 26| 8| 25| 30| 18| 23| 27| FEB 13|
| -Lowest | 29.50| 29.70| 29.48| 29.51| 29.80| 29.65| 29.59| 29.78| 29.73| 29.16| 29.48| 29.25| 29.16|
| -Date | 4| 16| 21| 16| 6| 2| 21| 22| 18| 11| 26| 21| OCT 11|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|RELATIVE HUMIDITY (%) | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Monthly | 74.6| 83.1| 70.0| 69.9| 81.3| 79.1| 82.2| 85.3| 88.8| 80.9| 82.1| 83.6| 80.1|
| -Local Time | | | | | | | | | | | | | |
| Hour 01 | 81| 89| 76| 82| 90| 92| 92| 95| 96| 89| 86| 89| 88|
| Hour 07 | 84| 91| 80| 83| 92| 85| 89| 97| 98| 91| 89| 91| 89|
| Hour 13 | 63| 71| 61| 56| 69| 64| 68| 70| 74| 65| 73| 73| 67|
| Hour 19 | 73| 83| 68| 61| 76| 73| 77| 81| 87| 80| 83| 84| 77|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|PRECIPITATION | | | | | | | | | | | | | |
| Water Equivalent | | | | | | | | | | | | | |
| -Total | 3.98| 1.89| 3.82| 2.64| 10.10| 5.35| 9.92| 5.20| 6.85| 2.14| 4.45| 4.37| 60.71|
| -Greatest (24 hrs) | 1.21| 0.40| 1.07| 1.21| 3.37| 1.60| 2.31| 1.33| 4.83| 1.33| 1.58| 1.55| 4.83|
| -Date | 28-29| 16-17| 20-21| 15-16| 28-29| 22-23| 11-12| 11-12| 8-9| 26-27| 12-13| 9-10| SEP 8-9|
| | | | | | | | | | | | | | |
| Snow, Ice pellets | | | | | | | | | | | | | |
| -Total | 14.0| T| 2.3| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| T| 16.3|
| -Greatest (24 hrs) | 7.0| T| 2.3| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| T| 7.0|
| -Date | 4| 2| 12| | | | | | | | | 5| JAN 4|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|WIND | | | | | | | | | | | | | |
| Resultant | | | | | | | | | | | | | |
| -Direction | 326| 17| 335| 307| 210| 339| 52| 235| 42| 264| 319| 236| 324|
| -Speed | 0.9| 0.4| 1.5| 0.2| 0.1| 0.0| 0.1| 0.0| 0.1| 0.2| 0.9| 0.4| 0.3|
| Average Speed | 1.4| 1.1| 2.3| 0.7| 0.2| 0.1| 0.3| 0.0| 0.1| 0.5| 6.4| 6.0| 1.6|
| Maximum Two-minute | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Direction | N| N| N| N| N| N| N| N| N| N| N| N| N|
| -Speed | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|
| -Date | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| JAN 1|
| Peak Gust | | | | | | | | | | | | | |
| -Direction | NW| NE| NW| SSW| NW| WNW| NE| WSW| NE| W| SW| NE| W|
| -Speed | 49| 34| 53| 33| 39| 37| 33| 25| 32| 65| 33| 46| 65|
| -Date | 4| 12| 2| 12| 14| 24| 7| 11| 13| 12| 1| 9| OCT 12|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
MEANS AND EXTREMES*
KPWR Portsmouth, Virginia
Latitude: 36° 59' 09" N Longitude: 76° 33' 00" W Elevation: 13 ft Time Zone: Eastern
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
| | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | Year|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|TEMPERATURE | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Daily Maximum | 48.1| 57.3| 60.0| 69.0| 79.6| 87.3| 90.2| 88.8| 83.7| 71.8| 60.8| 53.4| 70.8|
| -Daily Minimum | 30.3| 38.4| 42.4| 47.6| 61.5| 69.2| 72.2| 71.9| 69.6| 55.3| 42.6| 38.1| 53.3|
| -Monthly | 39.2| 47.9| 51.2| 58.3| 70.6| 78.2| 81.2| 80.3| 76.7| 63.5| 51.7| 45.7| 62.0|
| -Monthly Dewpt. | 30.5| 40.5| 41.0| 46.7| 63.3| 69.8| 73.3| 72.7| 71.0| 57.0| 44.9| 40.2| 54.2|
| Extremes | | | | | | | | | | | | | |
| -Record Highest | 73.2| 77.7| 84.7| 86.6| 93.4| 99.6| 99.2| 97.5| 93.8| 88.4| 80.6| 77.5| 99.6|
| -Year | 2018| 2018| 2016| 2016| 2018| 2015| 2015| 2016| 2015| 2018| 2018| 2016| JUN 2015|
| -Record Lowest | 7.1| 17.0| 28.3| 30.1| 44.9| 55.1| 56.3| 60.2| 52.3| 38.3| 28.4| 19.9| 7.1|
| -Year | 2018| 2016| 2018| 2016| 2016| 2016| 2018| 2018| 2015| 2015| 2016| 2016| JAN 2018|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|MEAN DEGREE DAYS | | | | | | | | | | | | | |
| Heating Base 65°F | 792| 489| 432| 225| 36| 0| 0| 0| 0| 120| 403| 551| 3046|
| | | | | | | | | | | | | | |
| Cooling Base 65°F | 1| 6| 14| 33| 218| 259| 512| 485| 359| 90| 15| 0| 1989|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|SOLAR RADIATION (W/m²) | 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|MEAN NUMBER OF DAYS | | | | | | | | | | | | | |
| Sunrise to Sunset | | | | | | | | | | | | | |
| -Clear | 13.0| 7.5| 14.5| 14.0| 9.0| 9.0| 8.7| 15.7| 9.0| 15.3| 18.5| 10.5| 144.7|
| -Partly Cloudy | 9.0| 12.0| 8.5| 10.5| 9.0| 9.3| 9.7| 14.0| 12.3| 8.7| 2.5| 7.0| 112.5|
| -Cloudy | 8.0| 9.0| 8.0| 5.0| 13.0| 1.7| 2.3| 1.3| 8.7| 4.3| 9.0| 11.5| 81.8|
| | | | | | | | | | | | | | |
| Precipitation | | | | | | | | | | | | | |
| .01 inches or more | 11.0| 13.0| 11.0| 9.0| 18.0| 8.3| 13.3| 9.7| 12.0| 7.7| 10.5| 11.5| 135.0|
| | | | | | | | | | | | | | |
| Snow, Ice pellets | | | | | | | | | | | | | |
| 1.0 inches or more | 2.0| 0.5| 0.5| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 3.0|
| | | | | | | | | | | | | | |
| Thunderstorms | 0.5| 0.5| 0.5| 1.0| 3.5| 4.3| 5.7| 4.3| 3.0| 0.0| 0.0| 0.0| 23.3|
| | | | | | | | | | | | | | |
| Heavy Fog, visibility| | | | | | | | | | | | | |
| 1/4 mile or less | 0.0| 0.5| 0.0| 0.0| 0.5| 0.7| 0.0| 0.3| 0.7| 0.3| 0.0| 1.5| 4.5|
| | | | | | | | | | | | | | |
| Temperature | | | | | | | | | | | | | |
| -Maximum | | | | | | | | | | | | | |
| 90°F and above | 0.0| 0.0| 0.0| 0.0| 4.5| 7.0| 18.3| 15.0| 5.0| 0.0| 0.0| 0.0| 49.8|
| 32°F and below | 4.0| 1.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 5.0|
| -Minimum | | | | | | | | | | | | | |
| 32°F and below | 19.0| 8.0| 3.5| 0.5| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 3.5| 9.0| 43.5|
| 0°F and below | 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|MEAN PRESSURE | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Monthly |30.131|30.142|29.996|30.020|29.996|29.940|29.976|30.013|30.038|30.064|30.085|30.138| 30.045|
| Extremes | | | | | | | | | | | | | |
| -Record Highest | 30.72| 30.75| 30.63| 30.46| 30.24| 30.35| 30.27| 30.30| 30.35| 30.50| 30.55| 30.66| 30.75|
| -Year | 2018| 2018| 2018| 2018| 2016| 2016| 2018| 2016| 2015| 2015| 2018| 2016| FEB 2018|
| -Record Lowest | 29.25| 29.37| 29.48| 29.46| 29.54| 29.49| 29.57| 29.75| 29.65| 29.16| 29.48| 29.25| 29.16|
| -Year | 2016| 2016| 2018| 2016| 2016| 2016| 2015| 2016| 2015| 2018| 2018| 2018| OCT 2018|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|RELATIVE HUMIDITY (%) | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Monthly | 73.5| 77.6| 71.1| 69.3| 81.4| 77.7| 79.6| 80.7| 85.5| 81.4| 79.5| 80.6| 78.2|
| -Local Time | | | | | | | | | | | | | |
| Hour 01 | 80| 83| 78| 81| 90| 90| 90| 92| 93| 89| 86| 85| 86|
| Hour 07 | 83| 86| 83| 82| 92| 85| 89| 94| 95| 92| 89| 88| 88|
| Hour 13 | 62| 66| 59| 56| 69| 64| 65| 65| 72| 67| 66| 69| 65|
| Hour 19 | 71| 78| 67| 62| 75| 71| 75| 76| 84| 79| 81| 81| 75|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|PRECIPITATION | | | | | | | | | | | | | |
| Water Equivalent | | | | | | | | | | | | | |
| -Mean | 4.36| 4.13| 3.58| 2.93| 7.47| 6.42| 7.28| 2.61| 9.24| 6.11| 2.74| 3.44| 60.31|
| -Maximum Monthly | 4.75| 6.36| 3.82| 3.22| 10.10| 8.71| 9.92| 5.20| 15.47| 11.56| 4.45| 4.37| 15.47|
| -Year | 2016| 2016| 2018| 2016| 2018| 2015| 2018| 2018| 2016| 2016| 2018| 2018| SEP 2016|
| -Minimum Monthly | 3.98| 1.89| 3.35| 2.64| 4.85| 5.19| 4.52| 1.00| 5.40| 2.14| 1.02| 2.51| 1.00|
| -Year | 2018| 2018| 2016| 2018| 2016| 2016| 2015| 2016| 2015| 2018| 2016| 2016| AUG 2016|
| -Greatest (24 hrs) | 2.38| 3.14| 1.11| 1.21| 3.37| 2.19| 3.03| 1.33| 5.27| 11.09| 1.58| 1.55| 11.09|
| -Year | 2016| 2016| 2016| 2018| 2018| 2016| 2016| 2018| 2016| 2016| 2018| 2018| OCT 2016|
| | | | | | | | | | | | | | |
| Snow,Ice pellets,Hail| | | | | | | | | | | | | |
| -Mean | 8.4| 0.9| 0.6| T| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| T| 9.9|
| -Maximum Monthly | 14.0| 1.8| 2.3| T| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| T| 14.0|
| -Year | 2018| 2016| 2018| 2016| 2016| 2015| 2015| 2015| 2015| 2015| 2016| 2018| JAN 2018|
| -Minimum Monthly | 2.8| 1.8| T| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0|
| -Year | 2016| 2016| 2016| 2018| 2016| 2015| 2015| 2015| 2015| 2015| 2016| 2016| JUN 2015|
| -Greatest (day) | 7.0| 1.2| 2.3| T| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| T| 7.0|
| -Year | 2018| 2016| 2018| 2016| 2016| 2015| 2015| 2015| 2015| 2015| 2016| 2018| JAN 2018|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|WIND | | | | | | | | | | | | | |
| Resultant | | | | | | | | | | | | | |
| -Direction | 322| 337| 338| 351| 357| 250| 220| 42| 40| 21| 325| 304| 347|
| -Speed | 1.7| 0.7| 1.0| 0.3| 0.0| 0.2| 0.1| 0.3| 1.1| 1.0| 0.7| 0.3| 0.5|
| Average Speed | 3.0| 2.7| 1.6| 0.9| 0.3| 1.7| 1.0| 1.3| 2.1| 2.2| 3.6| 3.6| 2.0|
| Maximum Two-minute | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Direction | N| N| N| N| N| N| N| N| N| N| N| N| N|
| -Speed | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|
| -Year | 2016| 2016| 2016| 2016| 2016| 2015| 2015| 2015| 2015| 2015| 2016| 2016| JUN 2015|
| Peak Gust | | | | | | | | | | | | | |
| -Direction | NW| W| NW| W| NW| WNW| NW| NE| NE| W| WNW| NE| W|
| -Speed | 49| 39| 53| 46| 39| 37| 35| 30| 55| 65| 33| 46| 65|
| -Year | 2018| 2016| 2018| 2016| 2018| 2018| 2016| 2015| 2016| 2018| 2016| 2018| OCT 2018|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
*NOTE: Length of record: June 2015 to December 2018.
STATION LOCATION AND INSTRUMENTATION
KPWR Portsmouth, Virginia
+-------------------------+----------+----------+------------+------------+-----------------------------------------------------+
| | | | | | Elevation Above (ft) |
| | | | | +------+----------------------------------------------+
| | | | | | | Ground |
| | | | Latitude | Longitude | Sea +-----+-----+-----+---------+-------+----------+
| | | | | | | | | | | | |
| Location | Occupied | Occupied | North | West | Level| Wind| Sun | Temp| Humidity| Rain | Barometer|
| | From | To | | | | | | | | | |
| | | | | | | | | | | | |
+-------------------------+----------+----------+------------+------------+------+-----+-----+-----+---------+-------+----------+
| | | | | | | | | | | | |
| | 07/01/76| 12/31/18|36° 59' 09" |76° 33' 00" | 13| 30| 0| 6| 6 | 15 | 15 |
| | | | | | | | | | | | |
| | | | | | | | | | | | |
+-------------------------+----------+----------+------------+------------+------+-----+-----+-----+---------+-------+----------+
Notes:
Units are: Temperature=°F, Wind=mph, Pressure=Inches Hg, Precipitation=inches.
INSTRUMENTATION DETAIL
The following equipment is used for measuring meteorological data at this station:
Davis Vantage Pro/Vue