LOCAL CLIMATOLOGICAL DATA Monthly Summary
December 2015
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| 57.9 | 48.4 | 53.2 | 53.5 | 53| 98| 12| 0|1........| 0| 0.12| 0.0| 30.13| 30.01|30.079| 1.8| 1.6|274| 12|WNW| 0| 0| | |02| 65.1 | 56.0 | 60.5 | 60.4 | 60| 99| 4| 0|12.......| 0| 0.05| 0.0| 30.00| 29.72|29.844| 0.7| 0.6|203| 22|SSE| 0| 0| | |03| 62.8 | 44.0 | 53.4 | 52.3 | 39| 62| 11| 0|.........| 0| 0.00| 0.0| 30.36| 29.74|30.080| 7.9| 7.3|313| 29| NW| 0| 0| | |04| 52.1 | 35.7 | 43.9 | 44.4 | 35| 71| 21| 0|.........| 0| 0.00| 0.0| 30.57| 30.37|30.479| 4.8| 4.0|335| 20|NNW| 0| 0| | |05| 54.2 | 32.2 | 43.2 | 43.4 | 39| 86| 22| 0|.........| 0| 0.00| 0.0| 30.65| 30.57|30.609| 2.6| 2.6| 52| 19| NE| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |06| 56.4 | 40.2 | 48.3 | 47.0 | 42| 85| 17| 0|.........| 0| 0.00| 0.0| 30.55| 30.28|30.432| 2.0| 1.4| 12| 16| NE| 0| 0| | |07| 53.3 | 40.5 | 46.9 | 46.9 | 46| 97| 18| 0|1........| 0| 0.66| 0.0| 30.26| 30.07|30.153| 2.1| 1.6| 9| 17|NNW| 0| 0| | |08| 54.4 | 37.0 | 45.7 | 44.7 | 41| 86| 19| 0|1........| 0| 0.00| 0.0| 30.15| 30.07|30.112| 1.6| 1.2|320| 16| NW| 0| 0| | |09| 62.5 | 36.2 | 49.3 | 48.6 | 45| 86| 15| 0|1........| 0| 0.00| 0.0| 30.15| 29.98|30.070| 0.5| 0.5|240| 22| W| 0| 0| | |10| 64.5 | 47.0 | 55.8 | 55.0 | 51| 87| 9| 0|1........| 0| 0.03| 0.0| 30.01| 29.92|29.965| 0.9| 0.4|339| 22|WNW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |11| 68.5 | 47.9 | 58.2 | 57.8 | 53| 86| 6| 0|1........| 0| 0.00| 0.0| 30.09| 29.93|30.001| 2.5| 2.4|219| 18| SW| 0| 0| | |12| 74.1 | 53.4 | 63.8 | 61.1 | 58| 89| 1| 0|1........| 0| 0.00| 0.0| 30.19| 30.10|30.150| 1.5| 1.5|228| 15| SW| 0| 0| | |13| 72.9 | 54.5 | 63.7 | 62.1 | 59| 91| 1| 0|.........| 0| 0.00| 0.0| 30.20| 30.07|30.144| 1.3| 1.2|233| 15|WSW| 0| 0| | |14| 75.8 | 59.2 | 67.5 | 67.0 | 65| 92| 0| 3|1........| 0| 0.03| 0.0| 30.05| 29.57|29.826| 2.7| 2.7|187| 26| S| 0| 0| | |15| 69.5 | 51.5 | 60.5 | 62.9 | 55| 78| 4| 0|.........| 0| 0.00| 0.0| 29.94| 29.56|29.734| 7.8| 6.2|257| 32|SSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |16| 59.8 | 48.2 | 54.0 | 53.0 | 47| 81| 11| 0|.........| 0| 0.00| 0.0| 30.10| 29.95|30.039| 4.1| 4.0| 53| 19|ENE| 0| 0| | |17| 68.9 | 50.5 | 59.7 | 61.4 | 61| 96| 5| 0|1........| 0| 0.52| 0.0| 29.97| 29.65|29.802| 1.4| 0.4|214| 20|WNW| 0| 0| | |18| 59.2 | 40.0 | 49.6 | 50.8 | 47| 88| 15| 0|1........| 0| 0.55| 0.0| 30.08| 12.00|29.080| 6.2| 4.6|313| 24| W| 0| 0| | |19| 44.9 | 31.1 | 38.0*| 37.9 | 25| 61| 27| 0|.........| 0| 0.00| 0.0| 30.43| 30.10|30.294| 6.3| 6.0|262| 26|WSW| 0| 0| | |20| 50.8 | 28.9*| 39.8 | 39.8 | 33| 77| 25| 0|.........| 0| 0.00| 0.0| 30.59| 30.43|30.512| 1.6| 1.6| 62| 16|ENE| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |21| 64.4 | 40.2 | 52.3 | 52.6 | 49| 86| 13| 0|.........| 0| 0.00| 0.0| 30.46| 30.15|30.307| 0.2| 0.2|225| 15| SW| 0| 0| | |22| 66.5 | 57.6 | 62.0 | 61.6 | 61| 96| 2| 0|1........| 0| 0.19| 0.0| 30.14| 29.96|30.054| 0.2| 0.2|203| 20|SSW| 0| 0| | |23| 72.3 | 60.8 | 66.6 | 67.0 | 67| 99| 0| 2|1........| 0| 0.51| 0.0| 30.10| 29.92|29.997| 0.3| 0.3|180| 22| S| 0| 0| | |24| 80.8*| 66.7 | 73.8*| 72.8 | 71| 93| 0| 9|1........| 0| 0.01| 0.0| 30.17| 29.98|30.078| 2.3| 2.3|199| 26|SSW| 0| 0| | |25| 79.0 | 67.5 | 73.3 | 72.6 | 70| 91| 0| 9|1........| 0| 0.00| 0.0| 30.22| 30.13|30.181| 3.3| 3.3|204| 20|SSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |26| 67.6 | 58.6 | 63.1 | 62.8 | 62| 98| 1| 0|1........| 0| 0.00| 0.0| 30.33| 30.19|30.263| 2.6| 2.3| 37| 18|NNW| 0| 0| | |27| 74.2 | 59.0 | 66.6 | 66.7 | 64| 92| 0| 2|12.......| 0| 0.00| 0.0| 30.20| 29.96|30.064| 4.4| 4.4|204| 27|SSW| 0| 0| | |28| 67.8 | 52.2 | 60.0 | 56.6 | 54| 91| 5| 0|1........| 0| 0.07| 0.0| 30.29| 30.02|30.184| 9.7| 8.6| 56| 29| NE| 0| 0| | |29| 76.6 | 58.2 | 67.4 | 67.0 | 65| 95| 0| 3|1........| 0| 0.27| 0.0| 30.12| 29.93|30.003| 2.0| 1.4|210| 27|SSW| 0| 0| | |30| 64.9 | 58.5 | 61.7 | 62.6 | 62| 99| 3| 0|1........| 0| 0.88| 0.0| 30.21| 30.06|30.142| 0.2| 0.2|203| 18|SSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |31| 64.6 | 52.1 | 58.3 | 57.6 | 57| 98| 6| 0|1........| 0| 0.36| 0.0| 30.14| 30.02|30.076| 0.9| 0.9| 49| 18| SW| 0| 0| | +--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ | Sum | Sum |------|------|---|----| Ttl| Ttl| |Total|Total| For the month: | ---- | +------+------+------+------+---+----+----+----+ Number of +-----+-----+------+------+------+----+----+---+---+---+---+---+------+ |2006.3|1513.8|------|------|---|----| 273| 28| Days | 4.25| 0.0| 30.65| 12.00|30.089| 2.8| 0.6|295| 32|SSW| 0| 0| ---- | +------+------+------+------+---+----+----+----+------------|+0.90" or 127% of normal +------+----+----+---+---+---+---+---+------+ | Avg | Avg | Avg | Mean |Avg| Avg|----|----|Precip | Season Ttl| Date | Date |------|----|----|---| Date | Date | Avg | +------+------+------+------+---+----+----+----+ +-----+-----+------+------+------+----+----+---+-------+-------+------+ | 64.8| 48.7| 56.8 | 56.5 | 53|88.2|----|----|≥.01 Inch 14|53.56| 0.0| 5 | 18 |------|----|----|---| 15 | 1+ | | + +11.5 +12.6 +12.1 ------+---+----+----+----+------------|+3.57" or 107% 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 | 652|1334|Thunder 0|Precipitation | Snow, Ice Plts | and Date | +--------+---------+--------+--------+----+----+------------+-------+------+---------+-------+-------------+----------------------+ | ≥90°F | ≤32°F | ≤32°F | ≤0°F |----|----|Heavy Fog 2| 1.09| 30-31| 0.0 | - | 0 | - | +--------+---------+--------+--------+----+----+------------+-------+------+---------+----+--+-------------+----------------------+ | 0 | 0 | 3 | 0 |----|----| Clear 11 Partly Cloudy 6 Cloudy 14 | +--------+---------+--------+--------+----+----+------------------------------------------+ 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: DECEMBER 2015 was the warmest December in the database to 1976 with a temperature average of 56.8 or 12.1 ABOVE normal.
The top 5 warmest December months include: 1) 56.8 2015 2) 52.0 1984 3) 50.7 1990 4) 50.0 1998 5) 49.7 2001

FROPA: 3rd, 7th, 15th, 18th, 26th, 28th, 29th, 31st
FROST: 4th, 5th, 20th
STATION RECORDS:
ALL-TIME DECEMBER MAX TEMP ON THE 24th [81]
ALL-TIME DECEMBER MAX LOW TEMP ON THE 24th & 25th [67]
13th TEMP Max Low 54 [previous 2001]
14th Temperature Max 76 [previous 72 2001]
17th Temperature TIED Maximum 69 [previous 2000]
17th RAINFALL 0.52" [previous 0.46" 2003]
24th Temperature Maximum 81 [previous 74 1990]
24th Temperature Maximum Low 67 [previous 51 1988]
25th Temperature Maximum 79 [previous 72 1982]
25th Temperature Maximum Low 67 [previous 55 1987]
26th Temperature Maximum Low 59 [previous 58 1982]
27th Temperature Maximum 74 [previous 62 2008]
27th Temperature Max Low 59 [previous 51 1982]
29th Temperature Max 77 [previous 76 1984]
29th Temperature TIED Max Low 58 [previous 1984]
30th RAINFALL 0.88" [previous 0.34" 1977]
30th TEMPERATURE Maximum Low 58 [previous 55 1990]
31st TEMPERATURE Maximum Low 58 [previously 1992] MONTHLY AVERAGE MAXIMUM TEMP OF 64.8 WAS 11.5 ABOVE NORMAL MONTHLY AVERAGE MINIMUM TEMP OF 48.7 WAS 12.6 ABOVE NORMAL MONTHLY AVERAGE TEMP OF 56.8 WAS 12.1 ABOVE NORMAL MAXIMUM TEMP: 81 ON THE 24th MINIMUM TEMP: 30 ON THE 20th DAYS WITH TEMPERATURES: MAXIMUM >= 90: 0 MAXIMUM <= 32: 0 MINIMUM <= 32: 0 MINIMUM <= 0: 0 HEATING DEGREE DAYS: 280.5 COOLING DEGREE DAYS: 25.0 DAYS WITH HEATING DEGREE DAYS: 25 DAYS WITH COOLING DEGREE DAYS: 6 PRECIP TOTAL OF 4.25" WAS 0.90" ABOVE NORMAL (127% OF NORMAL). GREATEST DAILY RAINFALL: 0.88" on the 30th GREATEST 24-HOUR RAINFALL: 1.09" on the 30th - 31st DAYS WITH MEASUREABLE PRECIP: 14 OF 31 DAYS OR 45.16% AVERAGE DAILY PRECIP: 0.14" NORMAL DAILY PRECIP: 0.11" DAYS WITH PRECIP >= 0.01" 14 DAYS WITH PRECIP >= 0.10" 9 DAYS WITH PRECIP >= 0.50" 5 DAYS WITH PRECIP >= 1.00" 0 DAYS WITH THUNDERSTORMS: 0 NUMBER OF THUNDERSTORMS: 0 DAYS WITH SNOW: 00 SNOWFALL TOTAL: 0.0" SEASONAL SNOWFALL 2015-2016: 0.0" CLOUDY DAYS: 14 PARTLY CLOUDY DAYS 6 SUNNY/CLEAR DAYS: 11 DAYS WITH F/GF: 20 DAYS WITH DENSE FOG: 2 DAYS WITH FROST: 3 YEAR-TO-DATE YEARLY AVERAGE MAXIMUM TEMP OF 70.8 WAS 1.1 ABOVE NORMAL YEARLY AVERAGE MINIMUM TEMP OF 53.2 WAS 1.7 ABOVE NORMAL YEARLY AVERAGE TEMP OF 62.0 WAS 1.4 ABOVE NORMAL MAXIMUM TEMP: 100 on June 23rd MINIMUM TEMP: 7 on February 20th DAYS WITH TEMPERATURES: MAXIMUM >= 90: 52 MAXIMUM <= 32: 10 MINIMUM <= 32: 53 MINIMUM <= 0: 0 HEATING DEGREE DAYS: 3063.0 COOLING DEGREE DAYS: 1975.0 DAYS WITH HEATING DEGREE DAYS: 190 DAYS WITH COOLING DEGREE DAYS: 170 PRECIP TOTAL OF 53.56" WAS 3.45" ABOVE NORMAL ( 107% OF NORMAL). GREATEST DAILY RAINFALL: 2.36" on October 2nd GREATEST 24-HOUR RAINFALL: 2.88" on September 30th - October 1st (3PM-3PM) DAYS WITH MEASUREABLE PRECIP: 139 of 365 or 38.08% AVERAGE DAILY PRECIP: 0.15" NORMAL DAILY PRECIP: 0.14" DAYS WITH PRECIP >= 0.01" 139 DAYS WITH PRECIP >= 0.10" 89 DAYS WITH PRECIP >= 0.50" 39 DAYS WITH PRECIP >= 1.00" 11 DAYS WITH THUNDERSTORMS: 23 NUMBER OF THUNDERSTORMS: 25 DAYS WITH SNOW (calendar year 2015): 10 SNOWFALL TOTAL (calendar year 2015): 13.5" SEASONAL SNOW 2015-2016 (beginning November 2015): 0.0" CLOUDY DAYS: 84 PARTLY CLOUDY DAYS: 147 SUNNY/CLEAR DAYS: 134 DAYS WITH F/GF: 61 DAYS WITH DENSE FOG: 8 DAYS WITH FROST: 22
OBSERVATIONS AT 3-HOUR INTERVALS
December 2015: 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| |30.13| 0.00| 50| 50| 99|31| 4| 11| |30.00| 0.00| 56| 56| 99|18| 0| 5| |29.74| 0.00| 63| 61| 95|22| 4| 17| |04| |30.11| 0.00| 49| 49| 99|29| 4| 7| |29.93| 0.00| 56| 56| 99|20| 0| 5| |29.84| 0.00| 59| 52| 77|31| 7| 19| |07| |30.13| 0.08| 48| 48| 99|24| 4| 11| |29.93| 0.00| 56| 56| 99|20| 0| 7| |29.95| 0.00| 53| 44| 72|29| 4| 18| |10| |30.12| 0.00| 52| 52|100|31| 0| 6| |29.90| 0.00| 59| 59|100|18| 0| 10| |30.08| 0.00| 50| 33| 51|31| 14| 29| |13| |30.09| 0.00| 58| 57| 97|24| 5| 12| |29.81| 0.01| 63| 63| 99|20| 0| 11| |30.08| 0.00| 51| 31| 46|31| 12| 26| |16| |30.03| 0.00| 58| 56| 95|24| 0| 6| |29.77| 0.01| 65| 65| 99|20| 0| 12| |30.14| 0.00| 51| 32| 47|29| 4| 17| |19| |30.05| 0.00| 56| 55| 97|24| 0| 6| |29.72| 0.03| 64| 64| 99|13| 0| 7| |30.26| 0.00| 49| 33| 54|33| 6| 16| |22| |30.02| 0.00| 56| 55| 98|18| 0| 7| |29.75| 0.00| 63| 62| 97|20| 0| 15| |30.34| 0.00| 46| 34| 61|33| 11| 19| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 4 | DEC 5 | DEC 6 | | | | | |01| |30.37| 0.00| 44| 33| 66|33| 7| 18| |30.57| 0.00| 35| 33| 92|00| 0| 0| |30.55| 0.00| 42| 39| 91|00| 0| 0| |04| |30.39| 0.00| 43| 34| 70|31| 7| 17| |30.59| 0.00| 33| 32| 94|31| 0| 7| |30.54| 0.00| 41| 40| 96|00| 0| 0| |07| |30.45| 0.00| 42| 34| 74|31| 6| 14| |30.61| 0.00| 32| 31| 95|29| 0| 7| |30.51| 0.00| 42| 38| 86|04| 0| 6| |10| |30.52| 0.00| 46| 36| 68|33| 10| 20| |30.65| 0.00| 51| 45| 80|04| 7| 16| |30.51| 0.00| 51| 44| 77|33| 6| 15| |13| |30.48| 0.00| 50| 37| 60|31| 6| 15| |30.61| 0.00| 54| 45| 72|06| 10| 17| |30.42| 0.00| 55| 47| 74|06| 6| 12| |16| |30.47| 0.00| 52| 37| 56|29| 5| 12| |30.61| 0.00| 52| 44| 75|04| 5| 14| |30.36| 0.00| 56| 47| 73|04| 5| 10| |19| |30.53| 0.00| 43| 37| 78|00| 0| 0| |30.62| 0.00| 48| 43| 85|04| 0| 10| |30.35| 0.00| 47| 43| 86|00| 0| 0| |22| |30.56| 0.00| 38| 35| 89|00| 0| 0| |30.61| 0.00| 44| 41| 92|00| 0| 0| |30.31| 0.00| 42| 40| 93|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 7 | DEC 8 | DEC 9 | | | | | |01| |30.26| 0.00| 41| 39| 95|04| 0| 4| |30.07| 0.00| 42| 42| 98|04| 0| 4| |30.12| 0.00| 38| 36| 93|00| 0| 0| |04| |30.22| 0.00| 44| 43| 97|00| 0| 5| |30.07| 0.00| 39| 38| 97|04| 0| 5| |30.12| 0.00| 37| 35| 94|00| 0| 0| |07| |30.20| 0.02| 47| 46| 98|00| 0| 5| |30.12| 0.00| 37| 37| 97|04| 0| 5| |30.14| 0.00| 36| 35| 95|00| 0| 0| |10| |30.17| 0.00| 52| 51| 97|33| 7| 14| |30.15| 0.00| 46| 45| 96|33| 5| 13| |30.15| 0.00| 48| 48|100|20| 0| 6| |13| |30.14| 0.02| 52| 51| 95|06| 6| 12| |30.10| 0.00| 54| 41| 63|31| 7| 16| |30.06| 0.00| 60| 52| 74|20| 0| 7| |16| |30.10| 0.10| 49| 48| 96|04| 5| 11| |30.10| 0.00| 54| 43| 66|15| 4| 7| |30.00| 0.00| 61| 51| 68|20| 0| 11| |19| |30.10| 0.04| 49| 48| 98|22| 0| 5| |30.14| 0.00| 46| 42| 86|00| 0| 0| |30.00| 0.00| 53| 48| 83|15| 0| 7| |22| |30.09| 0.00| 43| 42| 96|00| 0| 0| |30.13| 0.00| 41| 38| 91|00| 0| 0| |30.00| 0.00| 54| 50| 87|00| 0| 4| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 10 | DEC 11 | DEC 12 | | | | | |01| |29.97| 0.01| 54| 52| 91|27| 0| 12| |29.94| 0.00| 48| 46| 94|00| 0| 0| |30.10| 0.00| 55| 53| 95|22| 0| 5| |04| |29.96| 0.00| 53| 51| 95|00| 0| 0| |29.94| 0.00| 53| 52| 96|18| 0| 13| |30.12| 0.00| 54| 52| 96|22| 0| 6| |07| |29.99| 0.00| 48| 47| 95|00| 0| 0| |29.98| 0.00| 53| 51| 93|20| 5| 16| |30.15| 0.00| 54| 53| 98|22| 0| 7| |10| |30.01| 0.00| 54| 54| 99|22| 0| 7| |30.00| 0.00| 59| 55| 88|20| 4| 16| |30.19| 0.00| 60| 59| 99|20| 4| 13| |13| |29.95| 0.00| 63| 53| 69|29| 4| 12| |30.00| 0.00| 67| 58| 73|22| 6| 15| |30.13| 0.00| 71| 63| 76|22| 5| 12| |16| |29.93| 0.00| 64| 52| 66|06| 0| 7| |29.99| 0.00| 67| 56| 66|20| 5| 14| |30.13| 0.00| 73| 62| 69|24| 5| 15| |19| |29.96| 0.00| 56| 51| 86|06| 0| 6| |30.03| 0.00| 58| 53| 83|00| 0| 0| |30.16| 0.00| 64| 60| 86|20| 0| 4| |22| |29.97| 0.00| 51| 48| 91|15| 0| 7| |30.08| 0.00| 56| 54| 93|22| 0| 5| |30.18| 0.00| 60| 57| 92|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 13 | DEC 14 | DEC 15 | | | | | |01| |30.17| 0.00| 58| 57| 96|00| 0| 0| |30.05| 0.00| 60| 59| 97|20| 0| 5| |29.56| 0.00| 69| 67| 95|20| 7| 22| |04| |30.16| 0.00| 55| 54| 96|00| 0| 0| |30.02| 0.00| 62| 61| 97|13| 0| 4| |29.61| 0.00| 66| 61| 84|24| 11| 27| |07| |30.19| 0.00| 55| 54| 98|00| 0| 0| |29.97| 0.00| 61| 61| 97|18| 0| 4| |29.65| 0.00| 61| 57| 87|24| 7| 19| |10| |30.20| 0.00| 63| 63|100|22| 4| 10| |29.93| 0.00| 65| 64| 95|22| 0| 13| |29.72| 0.00| 63| 55| 75|24| 11| 23| |13| |30.14| 0.00| 73| 65| 76|24| 5| 15| |29.81| 0.00| 74| 64| 70|18| 5| 17| |29.71| 0.00| 68| 54| 61|27| 11| 22| |16| |30.12| 0.00| 71| 63| 75|22| 4| 12| |29.73| 0.01| 70| 67| 90|20| 4| 15| |29.77| 0.00| 68| 53| 59|29| 10| 18| |19| |30.11| 0.00| 64| 60| 88|00| 0| 0| |29.66| 0.00| 70| 69| 97|18| 5| 17| |29.84| 0.00| 58| 52| 79|27| 5| 6| |22| |30.09| 0.00| 60| 59| 94|13| 0| 5| |29.61| 0.00| 70| 69| 95|18| 6| 21| |29.89| 0.00| 52| 49| 91|06| 0| 5| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 16 | DEC 17 | DEC 18 | | | | | |01| |29.95| 0.00| 54| 46| 75|04| 6| 18| |29.97| 0.00| 51| 51| 98|22| 0| 5| |29.77| 0.00| 59| 59| 99|22| 0| 6| |04| |30.00| 0.00| 51| 45| 80|04| 6| 15| |29.92| 0.00| 57| 56| 97|13| 4| 12| |29.72| 0.00| 59| 59| 99|00| 0| 0| |07| |30.06| 0.00| 49| 44| 82|04| 4| 10| |29.89| 0.00| 61| 60| 97|15| 4| 12| |29.74| 0.10| 56| 56| 98|31| 6| 18| |10| |30.10| 0.00| 54| 44| 70|06| 10| 19| |29.84| 0.00| 65| 64| 97|18| 0| 5| |29.76| 0.00| 51| 50| 95|04| 6| 21| |13| |30.06| 0.00| 58| 48| 70|04| 5| 11| |29.75| 0.00| 68| 66| 91|15| 0| 7| |29.73| 0.00| 50| 46| 86|33| 10| 19| |16| |30.04| 0.00| 58| 50| 76|04| 7| 16| |29.68| 0.00| 69| 67| 96|22| 0| 7| |29.82| 0.00| 48| 41| 77|31| 10| 20| |19| |30.05| 0.00| 52| 49| 89|00| 0| 0| |29.72| 0.00| 60| 59| 96|31| 0| 6| |29.91| 0.00| 44| 40| 86|29| 0| 11| |22| |30.04| 0.00| 49| 48| 95|00| 0| 0| |29.76| 0.00| 59| 58| 98|20| 0| 12| |30.00| 0.00| 42| 33| 70|27| 12| 24| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
MAXIMUM SHORT DURATION PRECIPITATION
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Time Period (minutes) | 5 | 10 | 15 | 20 | 30 | 45 | 60 | 80 | 100 | 120 | 150 | 180 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Precipitation | 0.04 | 0.08 | 0.11 | 0.15 | 0.22 | 0.33 | 0.43 | 0.44 | 0.45 | 0.51 | 0.57 | 0.63 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Date | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 30 | 30 | 30 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Time | 1704 | 1709 | 1713 | 1719 | 1729 | 1744 | 1758 | 1758 | 1758 | 1500 | 1530 | 1600 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ 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 2015: 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| |30.10| 0.00| 38| 27| 63|27| 13| 25| |30.43| 0.00| 33| 26| 77|00| 0| 0| |30.46| 0.00| 40| 38| 90|00| 0| 0| |04| |30.19| 0.00| 35| 25| 67|27| 10| 24| |30.47| 0.00| 30| 26| 86|27| 0| 4| |30.42| 0.00| 41| 38| 90|27| 0| 5| |07| |30.28| 0.00| 33| 23| 68|24| 6| 15| |30.53| 0.00| 29| 26| 90|00| 0| 0| |30.39| 0.00| 42| 40| 92|00| 0| 0| |10| |30.34| 0.00| 37| 23| 57|27| 5| 17| |30.58| 0.00| 44| 36| 74|06| 0| 10| |30.38| 0.00| 52| 49| 88|27| 0| 12| |13| |30.28| 0.00| 43| 24| 47|24| 10| 23| |30.53| 0.00| 49| 35| 57|06| 6| 15| |30.28| 0.00| 62| 53| 73|20| 0| 7| |16| |30.29| 0.00| 45| 27| 49|22| 6| 20| |30.52| 0.00| 49| 36| 61|04| 7| 16| |30.24| 0.00| 64| 55| 75|18| 0| 12| |19| |30.36| 0.00| 39| 26| 59|20| 0| 13| |30.52| 0.00| 44| 38| 77|15| 0| 11| |30.20| 0.00| 58| 55| 89|15| 0| 5| |22| |30.41| 0.00| 35| 27| 71|20| 0| 6| |30.49| 0.00| 42| 37| 85|13| 0| 6| |30.18| 0.00| 58| 56| 92|18| 0| 6| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 22 | DEC 23 | DEC 24 | | | | | |01| |30.14| 0.00| 58| 56| 94|15| 0| 5| |30.10| 0.00| 61| 60| 98|00| 0| 0| |29.98| 0.00| 69| 68| 97|20| 4| 16| |04| |30.08| 0.00| 58| 57| 95|00| 0| 0| |30.08| 0.18| 61| 61| 99|00| 0| 0| |29.99| 0.00| 67| 66| 96|15| 0| 16| |07| |30.07| 0.00| 60| 59| 96|24| 0| 12| |30.07| 0.01| 62| 62|100|00| 0| 0| |30.06| 0.00| 68| 68| 99|20| 0| 7| |10| |30.06| 0.03| 62| 61| 99|13| 0| 7| |30.05| 0.10| 65| 65|100|20| 0| 7| |30.10| 0.01| 73| 73| 99|22| 0| 17| |13| |29.97| 0.01| 66| 65| 98|20| 0| 20| |29.96| 0.03| 69| 69|100|00| 0| 0| |30.06| 0.00| 81| 74| 81|18| 5| 22| |16| |29.99| 0.00| 65| 63| 93|24| 0| 13| |29.92| 0.00| 72| 72|100|13| 0| 15| |30.09| 0.00| 78| 73| 84|20| 5| 22| |19| |30.06| 0.00| 63| 62| 96|29| 0| 4| |29.93| 0.00| 72| 71| 98|18| 0| 17| |30.11| 0.00| 74| 71| 91|22| 0| 12| |22| |30.09| 0.00| 61| 60| 98|00| 0| 0| |29.94| 0.01| 72| 71| 96|18| 0| 15| |30.16| 0.00| 73| 71| 96|20| 4| 17| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 25 | DEC 26 | DEC 27 | | | | | |01| |30.16| 0.00| 71| 70| 97|11| 0| 10| |30.19| 0.00| 67| 66| 97|00| 0| 0| |30.20| 0.00| 59| 59|100|00| 0| 4| |04| |30.18| 0.00| 71| 70| 97|20| 4| 17| |30.22| 0.00| 65| 65| 98|00| 0| 5| |30.16| 0.00| 61| 61|100|00| 0| 5| |07| |30.20| 0.00| 70| 69| 97|20| 6| 16| |30.27| 0.00| 67| 66| 99|00| 0| 12| |30.15| 0.00| 63| 63|100|00| 0| 6| |10| |30.22| 0.00| 73| 70| 91|18| 5| 19| |30.33| 0.00| 62| 61| 97|33| 6| 18| |30.14| 0.00| 67| 67|100|20| 4| 19| |13| |30.14| 0.00| 79| 72| 79|20| 7| 18| |30.27| 0.00| 64| 63| 96|06| 4| 14| |30.01| 0.00| 73| 67| 83|20| 10| 27| |16| |30.15| 0.00| 76| 71| 84|20| 5| 14| |30.27| 0.00| 61| 60| 98|04| 7| 15| |29.96| 0.00| 73| 66| 79|20| 10| 24| |19| |30.21| 0.00| 73| 70| 89|20| 4| 11| |30.28| 0.00| 59| 59| 99|04| 5| 15| |29.98| 0.00| 68| 65| 88|20| 5| 16| |22| |30.16| 0.00| 69| 68| 95|00| 0| 12| |30.26| 0.00| 59| 59|100|04| 4| 7| |29.99| 0.00| 68| 65| 89|20| 7| 18| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 28 | DEC 29 | DEC 30 | | | | | |01| |30.02| 0.00| 68| 66| 94|22| 6| 18| |30.02| 0.01| 59| 59|100|00| 0| 0| |30.12| 0.00| 59| 58| 97|00| 0| 0| |04| |30.10| 0.03| 59| 57| 94|04| 11| 23| |29.98| 0.00| 65| 65|100|20| 0| 11| |30.17| 0.00| 61| 60| 99|00| 0| 0| |07| |30.20| 0.01| 54| 53| 95|04| 12| 24| |29.98| 0.01| 65| 65|100|00| 0| 0| |30.19| 0.01| 61| 61| 99|00| 0| 0| |10| |30.29| 0.00| 52| 48| 84|04| 10| 27| |29.98| 0.00| 70| 70|100|20| 0| 22| |30.20| 0.00| 62| 61| 99|06| 0| 4| |13| |30.26| 0.00| 54| 49| 82|06| 13| 24| |29.93| 0.00| 76| 72| 88|20| 10| 27| |30.16| 0.03| 65| 64| 97|00| 0| 0| |16| |30.24| 0.00| 55| 50| 82|06| 12| 22| |29.97| 0.00| 76| 71| 84|20| 7| 24| |30.12| 0.12| 64| 64|100|15| 0| 4| |19| |30.22| 0.00| 54| 52| 96|06| 10| 22| |30.05| 0.00| 64| 61| 90|33| 4| 13| |30.11| 0.05| 65| 65|100|13| 0| 5| |22| |30.13| 0.00| 56| 56| 99|06| 7| 18| |30.09| 0.00| 60| 59| 95|00| 0| 0| |30.09| 0.00| 64| 64|100|20| 0| 6| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 31 | | | | | | | |01| |30.04| 0.00| 65| 65|100|22| 0| 18| | | |04| |30.03| 0.00| 64| 64|100|00| 0| 0| | | |07| |30.06| 0.00| 64| 64|100|20| 0| 10| | | |10| |30.14| 0.00| 57| 56| 97|06| 4| 15| | | |13| |30.06| 0.19| 55| 54| 98|04| 0| 12| | | |16| |30.08| 0.00| 55| 54| 98|02| 0| 4| | | |19| |30.09| 0.00| 53| 53| 98|04| 4| 7| | | |22| |30.10| 0.00| 53| 53| 98|00| 0| 6| | | +--+----+-----+-----+---+---+---+--+---+---+---------------------------------------+---------------------------------------+
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| |30.105| 54| 52| 93| 1.6| 26 | 0.8| |04| |30.107| 53| 51| 93| 2.1| 30 | 0.8| |07| |30.133| 53| 51| 93| 2.1| 27 | 0.6| |10| |30.155| 57| 54| 89| 3.9| 34 | 1.4| |13| |30.097| 62| 55| 78| 5.4| 27 | 0.9| |16| |30.085| 62| 55| 79| 4.3| 26 | 0.4| |19| |30.107| 57| 53| 88| 1.5| 03 | 0.2| |22| |30.113| 55| 52| 92| 1.6| 27 | 0.4| +--+----+------+---+---+---+-----+----+----+
HOURLY PRECIPITATION (Water Equivalent)
December 2015: 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| | | | | |0.01|0.08|0.03| | | | | | | | | | | | | | | | |01 02| | | | | | | | | | | | |0.01| | |0.01| | |0.03| | | | | |02 03| | | | | | | | | | | | | | | | | | | | | | | | |03 04| | | | | | | | | | | | | | | | | | | | | | | | |04 05| | | | | | | | | | | | | | | | | | | | | | | | |05 | | | | | | | | | | | | | | | | | | | | | | | | | 06| | | | | | | | | | | | | | | | | | | | | | | | |06 07| | | | | | |0.02|0.01| | | |0.06|0.02|0.06|0.15|0.10|0.05|0.15|0.04| | | | | |07 08| | | | | | | | | | | | | | | | | | | | | | | | |08 09| | | | | | | | | | | | | | | | | | | | | | | | |09 10|0.01|0.02| | | | | | | | | | | | | | | | | | | | | | |10 | | | | | | | | | | | | | | | | | | | | | | | | | 11| | | | | | | | | | | | | | | | | | | | | | | | |11 12| | | | | | | | | | | | | | | | | | | | | | | | |12 13| | | | | | | | | | | | | | | | | | | | | | | | |13 14| | | | | | | | | | | | | | |0.01|0.01| | | | | | | |0.01|14 15| | | | | | | | | | | | | | | | | | | | | | | | |15 | | | | | | | | | | | | | | | | | | | | | | | | | 16| | | | | | | | | | | | | | | | | | | | | | | | |16 17| | | | | | | | | | | | | |0.05| | |0.04|0.43| | | | | | |17 18| | |0.01| |0.14|0.14|0.10|0.09|0.07| | | | | | | | | | | | | | | |18 19| | | | | | | | | | | | | | | | | | | | | | | | |19 20| | | | | | | | | | | | | | | | | | | | | | | | |20 | | | | | | | | | | | | | | | | | | | | | | | | | 21| | | | | | | | | | | | | | | | | | | | | | | | |21 22| | | | | | | |0.04|0.05|0.03|0.02|0.04|0.01| | | | | | | | | | | |22 23| | | |0.18|0.04| |0.01| |0.01|0.10| |0.01|0.03|0.07| | | | | | | |0.01|0.01|0.04|23 24| | | | | | | | | |0.01| | | | | | | | | | | | | | |24 25| | | | | | | | | | | | | | | | | | | | | | | | |25 | | | | | | | | | | | | | | | | | | | | | | | | | 26| | | | | | | | | | | | | | | | | | | | | | | | |26 27| | | | | | | | | | | | | | | | | | | | | | | | |27 28| | | |0.03| | |0.01| | | | | | | | | | | | | | | |0.03| |28 29|0.01|0.07|0.11| |0.02|0.01|0.01|0.02|0.02| | | | | | | | | | | | | | | |29 30| | | | | | |0.01| | | | | |0.03|0.24|0.26|0.12|0.02|0.03|0.05|0.05|0.01| |0.01|0.05|30 31| | | | | | | | |0.01| | |0.05|0.19|0.01| | |0.09|0.01| | | | | | |31 ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- Sum|0.02|0.09|0.12|0.21|0.20|0.16|0.24|0.19|0.16|0.14|0.02|0.16|0.29|0.43|0.42|0.24|0.20|0.62|0.12|0.05|0.01|0.01|0.05|0.10|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.)