LOCAL CLIMATOLOGICAL DATA Monthly Summary
December 2011
Station: Portsmouth, Virginia - KPWR Latitude: 36° 48' 04" N Longitude: 76° 19' 37" W Elevation (ground): 20 feet Time Zone: Eastern +--+-------------------------------+----+---------+---------+--+-----------+--------------------+-----------------------------+------+ | | Temperature | |Deg. Days|Precip Ty| | Precip | Pressure | Wind | Sun | | +------+------+------+------+---+ Hu-+----+----+1 fog | S+-----+-----+ Adj. to Sea Level +----+----+---+-------+-------+------+ | | M | M | A | | |mid-| H | C |2 hvy fog| n| | Ice +------+------+------+ Avg| Res|Res| Peak | Minute| Mean | | | a | i | v | | D | ity| e | o |3 thunder| o|Water| plts| | | | | | +---+---+---+---+ | | | x | n | e | | e | | a | o |4 ice plt| w| | | | | | S | S | | S | | S | | I | | D| i | i | r | M | w | M | t | l |5 hail | | E | S | | | M | p | p | | p | | p | | n | | a| m | m | a | e | | e | i | i |6 glaze | C| q | n | M | M | e | e | e | D | e | D | e | D | d | | t| u | u | g | a | P | a | n | n |7 duststm| v| u | o | a | i | a | e | e | i | e | i | e | i | e | | 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 | x | | | | | | | | | | |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| 50.0 | 35.9 | 43.0 | 42.8 | 33| 70| 22| 0|.........| 0| 0.00| 0.0| 30.36| 30.10|30.251| 5.7| 5.3| 11| 25|NNE| 0| 0| | |02| 57.3 | 31.6 | 44.5 | 42.8 | 34| 73| 20| 0|.........| 0| 0.00| 0.0| 30.48| 30.33|30.381| 1.3| 1.3|230| 16| SW| 0| 0| | |03| 52.1 | 38.2 | 45.2 | 46.9 | 40| 77| 20| 0|.........| 0| 0.00| 0.0| 30.62| 30.50|30.578| 4.8| 4.7| 81| 23|ENE| 0| 0| | |04| 62.6 | 37.8 | 50.2 | 49.9 | 46| 88| 14| 0|12.......| 0| 0.00| 0.0| 30.54| 30.40|30.465| 1.1| 1.1| 90| 14| E| 0| 0| | |05| 69.1 | 45.0 | 57.0 | 57.4 | 54| 88| 8| 0|12.......| 0| 0.00| 0.0| 30.39| 30.20|30.295| 0.0| 0.0| 0| 15| S| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |06| 71.2 | 57.1 | 64.1*| 63.2 | 59| 87| 1| 0|.........| 0| 0.00| 0.0| 30.18| 29.98|30.098| 2.1| 2.1|227| 22| SW| 0| 0| | |07| 73.2*| 45.0 | 59.1 | 65.0 | 60| 85| 6| 0|.........| 0| 0.26| 0.0| 29.97| 29.49|29.757| 8.2| 5.9|235| 54| W| 0| 0| | |08| 48.2 | 36.3 | 42.3 | 42.4 | 35| 76| 23| 0|.........| 0| 0.00| 0.0| 30.36| 29.87|30.202| 4.5| 4.0| 1| 35|NNW| 0| 0| | |09| 60.1 | 34.2 | 47.2 | 46.2 | 43| 86| 18| 0|.........| 0| 0.01| 0.0| 30.35| 30.21|30.276| 1.3| 0.2|241| 18| S| 0| 0| | |10| 49.5 | 41.1 | 45.3 | 46.7 | 36| 67| 19| 0|.........| 0| 0.00| 0.0| 30.49| 30.20|30.325| 6.6| 6.4| 28| 28| NE| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |11| 44.1 | 36.6 | 40.3 | 40.3 | 30| 67| 24| 0|.........| 0| 0.00| 0.0| 30.65| 30.49|30.580| 5.1| 5.0| 83| 22| E| 0| 0| | |12| 52.5 | 38.1 | 45.3 | 45.9 | 42| 85| 19| 0|.........| 0| 0.00| 0.0| 30.55| 30.45|30.498| 3.9| 3.6| 66| 17| E| 0| 0| | |13| 51.5 | 38.2 | 44.8 | 44.6 | 37| 76| 20| 0|.........| 0| 0.00| 0.0| 30.44| 30.36|30.404| 3.0| 3.0| 25| 18|NNE| 0| 0| | |14| 53.0 | 38.4 | 45.7 | 47.0 | 38| 71| 19| 0|.........| 0| 0.00| 0.0| 30.41| 30.34|30.378| 1.7| 1.3| 47| 15| NW| 0| 0| | |15| 66.4 | 44.2 | 55.3 | 54.8 | 48| 78| 10| 0|.........| 0| 0.00| 0.0| 30.31| 30.02|30.168| 6.3| 6.3|203| 30|SSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |16| 64.2 | 42.0 | 53.1 | 53.8 | 46| 77| 12| 0|.........| 0| 0.36| 0.0| 30.20| 30.01|30.121| 7.3| 0.8| 99| 27|SSW| 0| 0| | |17| 43.4 | 33.3 | 38.3 | 41.0 | 33| 75| 27| 0|.........| 0| 0.13| 0.0| 30.22| 30.14|30.180| 6.9| 6.3|333| 28| N| 0| 0| | |18| 43.4 | 31.1 | 37.3*| 37.5 | 28| 69| 28| 0|.........| 0| 0.00| 0.0| 30.37| 30.21|30.282| 3.6| 3.5|324| 21|WNW| 0| 0| | |19| 53.6 | 28.4*| 41.0 | 40.6 | 32| 71| 24| 0|.........| 0| 0.00| 0.0| 30.35| 30.16|30.268| 5.3| 5.3|203| 30|SSW| 0| 0| | |20| 58.1 | 44.1 | 51.1 | 50.1 | 42| 73| 14| 0|.........| 0| T | 0.0| 30.21| 30.14|30.164| 2.7| 2.5|215| 19|SSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |21| 62.3 | 51.0 | 56.7 | 58.3 | 57| 94| 8| 0|.........| 0| 0.60| 0.0| 30.14| 29.95|30.042| 5.5| 5.5|204| 33|SSW| 0| 0| | |22| 68.4 | 58.2 | 63.3 | 63.3 | 61| 92| 2| 0|.........| 0| 0.01| 0.0| 30.13| 29.92|30.039| 3.2| 3.1|200| 28|SSW| 0| 0| | |23| 67.5 | 48.7 | 58.1 | 58.8 | 50| 74| 6| 0|.........| 0| 0.00| 0.0| 30.25| 29.83|30.052| 8.9| 1.8|309| 33|SSW| 0| 0| | |24| 51.2 | 35.1 | 43.2 | 45.9 | 37| 71| 22| 0|.........| 0| 0.00| 0.0| 30.45| 30.24|30.374| 2.4| 1.9| 30| 23| NE| 0| 0| | |25| 53.9 | 31.8 | 42.8 | 42.8 | 37| 80| 22| 0|.........| 0| 0.00| 0.0| 30.41| 30.06|30.259| 4.4| 4.3|206| 24|SSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |26| 49.4 | 36.2 | 42.8 | 43.3 | 33| 66| 22| 0|.........| 0| 0.00| 0.0| 30.35| 30.07|30.262| 5.9| 4.9|316| 26| NW| 0| 0| | |27| 60.1 | 35.5 | 47.8 | 48.5 | 45| 87| 17| 0|.........| 0| 0.49| 0.0| 30.26| 29.51|29.844| 5.0| 3.9|198| 36|SSW| 0| 0| | |28| 52.4 | 36.5 | 44.5 | 46.1 | 34| 64| 20| 0|.........| 0| 0.00| 0.0| 30.03| 29.58|29.818| 9.0| 9.0|248| 32|WSW| 0| 0| | |29| 50.1 | 28.8 | 39.4 | 39.9 | 30| 69| 25| 0|.........| 0| 0.00| 0.0| 30.13| 30.02|30.059| 0.9| 0.9|207| 20|NNW| 0| 0| | |30| 59.5 | 35.5 | 47.5 | 46.5 | 38| 72| 17| 0|.........| 0| 0.00| 0.0| 30.12| 29.99|30.038| 2.4| 2.4|203| 21|SSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |31| 62.4 | 42.4 | 52.4 | 54.6 | 45| 72| 13| 0|.........| 0| T | 0.0| 30.14| 29.90|29.972| 4.1| 4.0|244| 25|WSW| 0| 0| | +--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ | Sum | Sum |------|------|---|----| Ttl| Ttl| |Total|Total| For the month: | ---- | +------+------+------+------+---+----+----+----+ Number of +-----+-----+------+------+------+----+----+---+---+---+---+---+------+ |1760.7|1216.3|------|------|---|----| 522| 0| Days | 1.86| 0.0| 30.65| 29.49|30.207| 4.3| 0.7|263| 54| W| 0| 0| ---- | +------+------+------+------+---+----+----+----+------------|-1.36" or 58% of normal +------+----+----+---+---+---+---+---+------+ | Avg | Avg | Avg | Mean |Avg| Avg|----|----|Precip | Season Ttl| Date | Date |------|----|----|---| Date | Date | Avg | +------+------+------+------+---+----+----+----+ +-----+-----+------+------+------+----+----+---+-------+-------+------+ | 56.7| 39.1| 47.9 | 48.6 | 41|76.8|----|----|>.01 Inch 7|51.12| 0.0| 11 | 7 |------|----|----|---| 7 | 1+ | | | +3.8 +3.5 +3.7 ------+---+----+----+----+------------|+2.47" or 105% 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 |1044|1919|Thunder 0|Precipitation | Snow, Ice Plts | and Date | +--------+---------+--------+--------+----+----+------------+-------+------+---------+-------+-------------+----------------------+ | >90°F | <32°F | <32°F | <0°F |----|----|Heavy Fog 2| 0.60| 21 | 0.0 | - | 0 | - | +--------+---------+--------+--------+----+----+------------+-------+------+---------+----+--+-------------+----------------------+ | 0 | 0 | 5 | 0 |----|----| Clear 8 Partly Cloudy 20 Cloudy 3 | +--------+---------+--------+--------+----+----+------------------------------------------+ 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: Sunshine index 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: 7th, 9th, 16th, 23rd, 26th, 27th, 28th,31st
FROST: 2nd, 9th, 18th, 19th, 25th, 29th, 30th
STATION RECORDS:
7th - WIND GUST 54mph [previous 46mph 1983]
22nd - TEMPERATURE Maximum Minimum 58 [previous 56 1990]
27th - WIND GUST 36mph [previous 30mph 2004]

December 2011 was the 8th driest December in the database to 1976.
December 2011 TIED with 1991 as the 7th warmest December in the database to 1976.
MONTHLY AVERAGE MAXIMUM TEMP OF 56.7 WAS 3.8 ABOVE NORMAL. MONTHLY AVERAGE MINIMUM TEMP OF 39.1 WAS 3.5 ABOVE NORMAL. MONTHLY AVERAGE TEMP OF 47.9 WAS 3.7 ABOVE NORMAL. MAXIMUM TEMP: 73 ON THE 7TH MINIMUM TEMP: 28 ON THE 19TH DAYS WITH TEMPERATURES: MAXIMUM >= 90: 0 MAXIMUM <= 32: 0 MINIMUM <= 32: 5 MINIMUM <= 0: 0 HEATING DEGREE DAYS: 529.0 COOLING DEGREE DAYS: 0.0 DAYS WITH HEATING DEGREE DAYS: 31 DAYS WITH COOLING DEGREE DAYS: 0 PRECIP TOTAL OF 1.86" WAS 1.36" BELOW NORMAL ( 58% OF NORMAL). GREATEST DAILY RAINFALL: 0.60 ON THE 21ST GREATEST 24-HOUR RAINFALL: 0.60" ON THE 21ST DAYS WITH MEASUREABLE PRECIP: 7 OR 22.58% AVERAGE DAILY PRECIP: 0.06" NORMAL DAILY PRECIP: 0.10" DAYS WITH PRECIP >= 0.01" 7 DAYS WITH PRECIP >= 0.10" 5 DAYS WITH PRECIP >= 0.50" 1 DAYS WITH PRECIP >= 1.00" 0 DAYS WITH THUNDERSTORMS: 0 NUMBER OF THUNDERSTORMS: 0 DAYS WITH SNOW: 0 SNOWFALL TOTAL: 0.0" SEASONAL SNOWFALL 2011-2012: 0.0" CLOUDY DAYS: 3 PARTLY CLOUDY DAYS: 20 SUNNY/CLEAR DAYS: 8 DAYS WITH F/GF: 2 DAYS WITH DENSE FOG: 2 DAYS WITH FROST: 7 YEAR-TO-DATE YEARLY AVERAGE MAXIMUM TEMP OF 72.0 WAS 1.1 ABOVE NORMAL. YEARLY AVERAGE MINIMUM TEMP OF 53.0 WAS 0.3 ABOVE NORMAL. YEARLY AVERAGE TEMP OF 62.5 WAS 0.7 ABOVE NORMAL. MAXIMUM TEMP: 102 ON JULY 22ND AND 23RD MINIMUM TEMP: 15 ON JANUARY 23RD DAYS WITH TEMPERATURES: MAXIMUM >= 90: 48 MAXIMUM <= 32: 1 MINIMUM <= 32: 42 MINIMUM <= 0: 0 HEATING DEGREE DAYS: 3222.0 COOLING DEGREE DAYS: 1871.5 DAYS WITH HEATING DEGREE DAYS: 201 DAYS WITH COOLING DEGREE DAYS: 162 PRECIP TOTAL OF 51.12" WAS 2.47" ABOVE NORMAL (105% OF NORMAL). GREATEST DAILY RAINFALL: 7.82" ON AUGUST 27TH GREATEST 24-HOUR RAINFALL: 7.82" ON AUGUST 27TH DAYS WITH MEASUREABLE PRECIP: 129 OF 365 OR 35.34% AVERAGE DAILY PRECIP: 0.15" NORMAL DAILY PRECIP: 0.14" DAYS WITH PRECIP >= 0.01" 129 DAYS WITH PRECIP >= 0.10" 76 DAYS WITH PRECIP >= 0.50" 31 DAYS WITH PRECIP >= 1.00" 10 DAYS WITH THUNDERSTORMS: 39 NUMBER OF THUNDERSTORMS: 43 DAYS WITH SNOW (calendar year 2011): 5 SNOWFALL TOTAL (calendar year 2011): 3.6" SEASONAL SNOW 2011-2012 (beginning November 2011): 0.0" CLOUDY DAYS: 45 PARTLY CLOUDY DAYS: 187 SUNNY/CLEAR DAYS: 133 DAYS WITH F/GF: 67 DAYS WITH DENSE FOG: 06 DAYS WITH FROST: 33
OBSERVATIONS AT 3-HOUR INTERVALS
December 2011: Portsmouth, Virginia - KPWR
+--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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| |30.10| 0.00| 43| 35| 75|00| 6| 17| |30.35| 0.00| 35| 32| 87|00| 0| 0| |30.50| 0.00| 46| 42| 87|04| 4| 16| |04| |30.15| 0.00| 41| 33| 73|00| 7| 21| |30.35| 0.00| 33| 30| 90|00| 0| 0| |30.54| 0.00| 45| 36| 70|06| 5| 17| |07| |30.22| 0.00| 38| 31| 75|00| 6| 16| |30.38| 0.00| 32| 29| 91|00| 0| 0| |30.58| 0.00| 43| 37| 77|09| 5| 14| |10| |30.29| 0.00| 43| 33| 68|04| 12| 24| |30.41| 0.00| 45| 37| 73|22| 4| 10| |30.62| 0.00| 49| 42| 78|09| 10| 19| |13| |30.26| 0.00| 48| 35| 60|02| 10| 21| |30.34| 0.00| 56| 37| 49|22| 5| 14| |30.59| 0.00| 52| 43| 72|09| 7| 17| |16| |30.27| 0.00| 50| 33| 53|33| 5| 14| |30.35| 0.00| 56| 36| 47|22| 4| 14| |30.59| 0.00| 51| 43| 72|09| 6| 19| |19| |30.31| 0.00| 42| 34| 73|00| 0| 4| |30.40| 0.00| 46| 36| 69|00| 0| 0| |30.59| 0.00| 46| 41| 85|02| 0| 4| |22| |30.34| 0.00| 38| 33| 84|00| 0| 0| |30.46| 0.00| 41| 35| 81|00| 0| 0| |30.58| 0.00| 43| 41| 90|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 4 | DEC 5 | DEC 6 | | | | | |01| |30.54| 0.00| 42| 39| 90|00| 0| 0| |30.39| 0.00| 46| 44| 93|00| 0| 0| |30.17| 0.00| 58| 57| 94|13| 0| 10| |04| |30.51| 0.00| 39| 36| 91|00| 0| 0| |30.34| 0.00| 47| 46| 95|06| 0| 5| |30.17| 0.00| 58| 57| 95|15| 0| 5| |07| |30.52| 0.00| 38| 36| 92|00| 0| 0| |30.34| 0.00| 50| 49| 96|00| 0| 0| |30.16| 0.00| 57| 56| 96|15| 0| 5| |10| |30.52| 0.00| 53| 51| 93|09| 0| 7| |30.34| 0.00| 59| 58| 96|15| 0| 12| |30.14| 0.00| 64| 62| 91|22| 4| 14| |13| |30.44| 0.00| 62| 54| 77|09| 4| 11| |30.28| 0.00| 69| 60| 72|20| 0| 12| |30.06| 0.00| 71| 63| 76|22| 7| 20| |16| |30.40| 0.00| 62| 56| 80|09| 4| 12| |30.24| 0.00| 65| 59| 80|18| 0| 14| |30.04| 0.00| 70| 61| 74|22| 6| 19| |19| |30.41| 0.00| 55| 51| 88|06| 0| 4| |30.24| 0.00| 62| 57| 85|18| 0| 7| |30.04| 0.00| 64| 59| 83|24| 0| 5| |22| |30.40| 0.00| 50| 48| 93|00| 0| 0| |30.22| 0.00| 60| 57| 90|18| 0| 7| |30.03| 0.00| 62| 59| 90|22| 0| 16| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 7 | DEC 8 | DEC 9 | | | | | |01| |29.97| 0.00| 61| 59| 92|24| 4| 12| |29.87| 0.00| 44| 40| 85|33| 14| 34| |30.35| 0.00| 36| 33| 89|00| 0| 0| |04| |29.93| 0.00| 62| 59| 91|24| 5| 18| |30.00| 0.00| 41| 37| 85|00| 5| 20| |30.33| 0.00| 34| 32| 91|00| 0| 0| |07| |29.89| 0.00| 62| 60| 94|22| 5| 17| |30.15| 0.00| 39| 36| 87|00| 4| 12| |30.33| 0.00| 35| 33| 92|00| 0| 0| |10| |29.86| 0.00| 67| 63| 88|22| 11| 28| |30.25| 0.00| 43| 32| 67|02| 10| 19| |30.31| 0.00| 51| 47| 88|13| 0| 11| |13| |29.71| 0.00| 72| 64| 76|22| 11| 31| |30.26| 0.00| 46| 33| 60|31| 6| 16| |30.25| 0.00| 59| 52| 76|20| 4| 17| |16| |29.60| 0.00| 72| 63| 73|22| 7| 27| |30.27| 0.00| 47| 34| 60|02| 4| 11| |30.22| 0.00| 53| 47| 81|00| 5| 15| |19| |29.50| 0.00| 67| 61| 80|20| 5| 22| |30.33| 0.00| 41| 34| 77|00| 0| 0| |30.22| 0.00| 50| 46| 86|00| 0| 10| |22| |29.65| 0.17| 50| 48| 92|00| 14| 27| |30.35| 0.00| 37| 34| 86|00| 0| 0| |30.22| 0.00| 50| 48| 91|29| 0| 5| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 10 | DEC 11 | DEC 12 | | | | | |01| |30.21| 0.00| 49| 45| 87|33| 4| 11| |30.49| 0.00| 41| 29| 63|09| 4| 11| |30.55| 0.00| 40| 37| 88|02| 0| 6| |04| |30.20| 0.00| 49| 42| 77|02| 6| 15| |30.53| 0.00| 39| 28| 64|06| 6| 18| |30.54| 0.00| 43| 39| 85|06| 4| 11| |07| |30.26| 0.00| 48| 38| 70|02| 7| 20| |30.58| 0.00| 37| 25| 61|09| 7| 19| |30.52| 0.00| 42| 38| 85|06| 5| 16| |10| |30.35| 0.00| 47| 34| 60|04| 13| 28| |30.65| 0.00| 41| 25| 54|06| 10| 21| |30.53| 0.00| 46| 42| 85|09| 5| 15| |13| |30.32| 0.00| 48| 34| 60|04| 11| 23| |30.60| 0.00| 44| 32| 64|09| 10| 22| |30.49| 0.00| 52| 47| 81|09| 6| 16| |16| |30.34| 0.00| 47| 34| 61|02| 5| 16| |30.60| 0.00| 43| 33| 66|09| 6| 17| |30.46| 0.00| 49| 44| 82|02| 5| 14| |19| |30.42| 0.00| 44| 34| 67|02| 4| 12| |30.59| 0.00| 39| 32| 75|06| 0| 7| |30.45| 0.00| 47| 43| 86|02| 4| 12| |22| |30.47| 0.00| 42| 30| 60|06| 0| 12| |30.58| 0.00| 39| 34| 83|02| 0| 4| |30.46| 0.00| 48| 44| 87|00| 0| 7| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 13 | DEC 14 | DEC 15 | | | | | |01| |30.43| 0.00| 44| 40| 87|02| 5| 12| |30.37| 0.00| 42| 34| 73|02| 0| 10| |30.31| 0.00| 46| 42| 86|06| 0| 5| |04| |30.42| 0.00| 44| 41| 89|02| 5| 15| |30.37| 0.00| 40| 34| 80|02| 0| 10| |30.28| 0.00| 45| 42| 90|06| 0| 5| |07| |30.44| 0.00| 39| 36| 90|02| 0| 7| |30.40| 0.00| 43| 38| 80|02| 0| 7| |30.27| 0.00| 45| 42| 90|00| 0| 0| |10| |30.44| 0.00| 45| 37| 74|02| 6| 16| |30.41| 0.00| 48| 40| 73|06| 4| 14| |30.26| 0.00| 53| 46| 78|20| 6| 18| |13| |30.39| 0.00| 50| 34| 54|02| 7| 18| |30.38| 0.00| 52| 38| 57|02| 5| 14| |30.13| 0.00| 65| 53| 66|20| 13| 28| |16| |30.36| 0.00| 51| 38| 61|04| 5| 14| |30.36| 0.00| 52| 39| 60|09| 4| 10| |30.06| 0.00| 65| 51| 62|20| 11| 28| |19| |30.38| 0.00| 44| 36| 75|00| 0| 0| |30.37| 0.00| 49| 39| 67|06| 0| 7| |30.05| 0.00| 61| 52| 73|20| 11| 23| |22| |30.39| 0.00| 39| 34| 84|06| 0| 4| |30.36| 0.00| 50| 44| 81|06| 0| 5| |30.04| 0.00| 60| 53| 77|20| 10| 22| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 16 | DEC 17 | DEC 18 | | | | | |01| |30.01| 0.00| 59| 53| 82|20| 10| 23| |30.17| 0.03| 42| 40| 94|31| 4| 10| |30.21| 0.00| 33| 28| 81|31| 0| 5| |04| |30.02| 0.00| 59| 54| 85|20| 7| 21| |30.15| 0.00| 41| 39| 93|31| 5| 17| |30.22| 0.00| 37| 29| 72|33| 6| 16| |07| |30.07| 0.00| 57| 53| 88|20| 5| 17| |30.18| 0.00| 40| 35| 83|33| 6| 17| |30.24| 0.00| 34| 27| 75|00| 0| 5| |10| |30.13| 0.00| 61| 55| 82|24| 5| 17| |30.21| 0.00| 42| 35| 75|33| 15| 24| |30.30| 0.00| 39| 27| 60|33| 7| 17| |13| |30.15| 0.00| 54| 41| 61|04| 12| 26| |30.16| 0.00| 43| 32| 66|31| 7| 20| |30.26| 0.00| 43| 30| 61|31| 7| 19| |16| |30.16| 0.00| 50| 39| 66|04| 7| 20| |30.16| 0.00| 42| 31| 65|29| 7| 18| |30.27| 0.00| 43| 29| 59|33| 6| 17| |19| |30.20| 0.00| 48| 38| 67|04| 7| 21| |30.20| 0.00| 41| 30| 65|33| 6| 17| |30.35| 0.00| 38| 28| 69|33| 0| 7| |22| |30.19| 0.04| 43| 40| 90|04| 4| 12| |30.20| 0.00| 38| 28| 68|31| 0| 7| |30.37| 0.00| 33| 28| 82|31| 0| 5| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
MAXIMUM SHORT DURATION PRECIPITATION
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Time Period (minutes) | 5 | 10 | 15 | 20 | 30 | 45 | 60 | 80 | 100 | 120 | 150 | 180 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Precipitation | 0.02 | 0.04 | 0.05 | 0.07 | 0.10 | 0.14 | 0.19 | 0.24 | 0.29 | 0.34 | 0.38 | 0.43 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Date | 07 | 27 | 07 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Time | 2103 | 1510 | 2114 | 1520 | 1530 | 1536 | 1600 | 1600 | 1600 | 1600 | 1556 | 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 2011: Portsmouth, Virginia - KPWR
+--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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| |30.34| 0.00| 30| 26| 85|00| 0| 0| |30.15| 0.00| 45| 35| 68|20| 6| 17| |30.14| 0.00| 51| 48| 89|00| 0| 0| |04| |30.34| 0.00| 30| 26| 86|00| 0| 0| |30.14| 0.00| 45| 37| 74|20| 4| 14| |30.11| 0.00| 55| 51| 89|22| 0| 10| |07| |30.35| 0.00| 29| 26| 88|20| 0| 6| |30.18| 0.00| 45| 39| 80|20| 4| 11| |30.10| 0.00| 54| 53| 94|22| 0| 6| |10| |30.35| 0.00| 40| 34| 78|20| 5| 20| |30.21| 0.00| 52| 43| 73|24| 4| 11| |30.09| 0.00| 58| 56| 94|20| 4| 12| |13| |30.25| 0.00| 51| 36| 56|20| 10| 23| |30.16| 0.00| 57| 45| 64|24| 4| 10| |30.02| 0.05| 62| 60| 96|20| 5| 20| |16| |30.19| 0.00| 53| 36| 53|20| 12| 24| |30.14| 0.00| 56| 44| 63|22| 0| 5| |29.99| 0.14| 62| 61| 97|20| 7| 19| |19| |30.19| 0.00| 47| 35| 63|20| 4| 11| |30.16| 0.00| 49| 42| 77|22| 0| 7| |29.95| 0.00| 61| 61| 98|20| 5| 24| |22| |30.18| 0.00| 47| 34| 60|20| 10| 22| |30.17| 0.00| 51| 47| 84|15| 0| 5| |29.99| 0.00| 62| 60| 94|20| 13| 29| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 22 | DEC 23 | DEC 24 | | | | | |01| |29.98| 0.00| 62| 59| 92|20| 11| 28| |29.86| 0.00| 65| 62| 88|20| 7| 28| |30.24| 0.00| 48| 39| 72|04| 0| 11| |04| |30.02| 0.00| 59| 58| 95|20| 4| 11| |29.83| 0.00| 65| 61| 87|20| 13| 31| |30.26| 0.00| 47| 37| 68|02| 0| 6| |07| |30.08| 0.00| 59| 57| 94|22| 0| 7| |29.93| 0.00| 67| 61| 80|22| 10| 21| |30.33| 0.00| 47| 37| 70|04| 0| 6| |10| |30.13| 0.00| 63| 61| 95|20| 4| 12| |30.10| 0.00| 58| 49| 73|00| 10| 20| |30.41| 0.00| 49| 39| 67|04| 0| 7| |13| |30.07| 0.00| 68| 64| 87|20| 4| 12| |30.06| 0.00| 60| 48| 66|29| 4| 18| |30.40| 0.00| 48| 39| 71|04| 11| 23| |16| |30.04| 0.00| 67| 63| 87|15| 0| 5| |30.11| 0.00| 56| 44| 64|04| 10| 24| |30.40| 0.00| 46| 36| 69|04| 5| 16| |19| |30.00| 0.00| 63| 60| 92|15| 0| 11| |30.21| 0.00| 51| 42| 71|04| 7| 20| |30.45| 0.00| 42| 35| 75|06| 0| 5| |22| |29.95| 0.00| 65| 62| 93|20| 5| 19| |30.23| 0.00| 50| 40| 70|33| 5| 15| |30.45| 0.00| 38| 33| 80|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 25 | DEC 26 | DEC 27 | | | | | |01| |30.41| 0.00| 35| 31| 86|00| 0| 0| |30.07| 0.00| 44| 39| 80|24| 7| 21| |30.26| 0.00| 36| 31| 84|00| 0| 0| |04| |30.37| 0.00| 33| 30| 88|00| 0| 0| |30.13| 0.00| 42| 34| 74|29| 5| 15| |30.19| 0.00| 37| 33| 84|04| 0| 4| |07| |30.38| 0.00| 32| 29| 89|00| 0| 0| |30.21| 0.00| 43| 32| 66|31| 7| 21| |30.13| 0.00| 40| 36| 85|00| 0| 0| |10| |30.36| 0.00| 45| 40| 83|20| 4| 14| |30.33| 0.00| 47| 34| 60|31| 7| 18| |29.98| 0.00| 47| 42| 83|13| 5| 19| |13| |30.23| 0.00| 53| 42| 66|20| 10| 19| |30.31| 0.00| 49| 32| 52|31| 13| 26| |29.72| 0.02| 55| 53| 93|13| 4| 19| |16| |30.18| 0.00| 53| 43| 69|20| 6| 17| |30.31| 0.00| 49| 33| 54|00| 7| 19| |29.52| 0.18| 59| 58| 97|18| 6| 27| |19| |30.10| 0.00| 48| 41| 77|20| 7| 17| |30.34| 0.00| 41| 33| 73|04| 0| 6| |29.53| 0.00| 59| 57| 94|20| 11| 23| |22| |30.08| 0.00| 45| 40| 82|20| 6| 18| |30.32| 0.00| 38| 32| 80|00| 0| 0| |29.56| 0.00| 53| 45| 75|24| 12| 27| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 28 | DEC 29 | DEC 30 | | | | | |01| |29.58| 0.00| 50| 43| 78|24| 11| 25| |30.04| 0.00| 37| 27| 67|33| 0| 20| |30.03| 0.00| 39| 34| 82|20| 4| 12| |04| |29.66| 0.00| 44| 36| 73|24| 10| 22| |30.05| 0.00| 32| 26| 81|00| 0| 0| |30.05| 0.00| 36| 32| 86|00| 0| 0| |07| |29.75| 0.00| 42| 35| 74|24| 10| 24| |30.10| 0.00| 29| 25| 86|00| 0| 0| |30.08| 0.00| 36| 32| 85|20| 0| 4| |10| |29.83| 0.00| 47| 36| 64|24| 12| 30| |30.13| 0.00| 39| 30| 70|24| 0| 10| |30.12| 0.00| 44| 37| 76|20| 6| 15| |13| |29.81| 0.00| 52| 35| 53|24| 14| 31| |30.06| 0.00| 49| 32| 52|20| 0| 14| |30.03| 0.00| 57| 42| 58|20| 6| 18| |16| |29.86| 0.00| 51| 33| 50|24| 12| 27| |30.03| 0.00| 49| 34| 55|20| 4| 12| |30.00| 0.00| 58| 41| 53|20| 6| 21| |19| |29.96| 0.00| 45| 31| 57|24| 5| 16| |30.02| 0.00| 46| 33| 61|15| 0| 11| |30.01| 0.00| 51| 41| 67|15| 0| 10| |22| |30.02| 0.00| 38| 29| 69|24| 0| 7| |30.04| 0.00| 41| 32| 71|00| 0| 0| |30.01| 0.00| 50| 41| 72|20| 4| 15| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 31 | | | | | | | |01| |29.96| 0.00| 51| 43| 75|20| 0| 11| | | |04| |29.91| 0.00| 52| 46| 79|20| 0| 12| | | |07| |29.90| 0.00| 51| 46| 84|22| 0| 6| | | |10| |29.94| 0.00| 58| 51| 79|24| 7| 25| | | |13| |29.91| 0.00| 62| 47| 59|24| 12| 25| | | |16| |29.97| 0.00| 61| 45| 55|24| 11| 23| | | |19| |30.06| 0.00| 55| 43| 63|27| 0| 10| | | |22| |30.13| 0.00| 47| 40| 77|24| 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| |30.180| 45| 40| 83| 3.1| 25 | 1.1| |04| |30.180| 45| 40| 83| 2.9| 29 | 0.6| |07| |30.208| 44| 39| 84| 2.5| 30 | 0.4| |10| |30.239| 50| 43| 77| 6.2| 30 | 0.8| |13| |30.179| 55| 44| 66| 7.7| 25 | 1.6| |16| |30.165| 55| 43| 66| 6.2| 24 | 1.3| |19| |30.187| 50| 42| 75| 2.3| 21 | 0.7| |22| |30.202| 47| 41| 81| 2.5| 23 | 1.2| +--+----+------+---+---+---+-----+----+----+
HOURLY PRECIPITATION (Water Equivalent)
December 2011: Portsmouth, Virginia - KPWR
---+-----------------------------------------------------------+-----------------------------------------------------------+--- | | | 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| | | | | | | | | | | | | | | | | | | | | | | | |01 02| | | | | | | | | | | | | | | | | | | | | | | | |02 03| | | | | | | | | | | | | | | | | | | | | | | | |03 04| | | | | | | | | | | | | | | | | | | | | | | | |04 05| | | | | | | | | | | | | | | | | | | | | | | | |05 | | | | | | | | | | | | | | | | | | | | | | | | | 06| | | | | | | | | | | | | | | | | | | | | | | | |06 07| | | | | | | | | | | | | | | | | | | | | |0.05|0.17|0.04|07 08| | | | | | | | | | | | | | | | | | | | | | | | |08 09| | | | | | | | | | | | | | | | | | | | | | | |0.01|09 10| | | | | | | | | | | | | | | | | | | | | | | | |10 | | | | | | | | | | | | | | | | | | | | | | | | | 11| | | | | | | | | | | | | | | | | | | | | | | | |11 12| | | | | | | | | | | | | | | | | | | | | | | | |12 13| | | | | | | | | | | | | | | | | | | | | | | | |13 14| | | | | | | | | | | | | | | | | | | | | | | | |14 15| | | | | | | | | | | | | | | | | | | | | | | | |15 | | | | | | | | | | | | | | | | | | | | | | | | | 16| | | | | | | | | | | | | | | | | | | | |0.01|0.06|0.04|0.25|16 17| |0.03|0.09|0.01| | | | | | | | | | | | | | | | | | | | |17 18| | | | | | | | | | | | | | | | | | | | | | | | |18 19| | | | | | | | | | | | | | | | | | | | | | | | |19 20| | | | | | | | | | | | | | | | | | | | | | | | |20 | | | | | | | | | | | | | | | | | | | | | | | | | 21| | | | | | |0.04| | | | | |0.04|0.05|0.08|0.01|0.14|0.13|0.11| | | | | |21 22| | | | | | | | | | | | | | | | | | |0.01| | | | | |22 23| | | | | | | | | | | | | | | | | | | | | | | | |23 24| | | | | | | | | | | | | | | | | | | | | | | | |24 25| | | | | | | | | | | | | | | | | | | | | | | | |25 | | | | | | | | | | | | | | | | | | | | | | | | | 26| | | | | | | | | | | | | | | | | | | | | | | | |26 27| | | | | | | | | | | |0.01|0.01|0.02|0.09|0.15|0.18|0.03| | | | | | |27 28| | | | | | | | | | | | | | | | | | | | | | | | |28 29| | | | | | | | | | | | | | | | | | | | | | | | |29 30| | | | | | | | | | | | | | | | | | | | | | | | |30 31| | | | | | | | | | | | | | | | | | | | | | | | |31 ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- Sum| |0.03|0.09|0.01|0.00|0.00|0.04|0.00|0.00|0.00|0.00|0.01|0.05|0.07|0.17|0.16|0.32|0.16|0.12|0.00|0.01|0.11|0.21|0.30|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.)