LOCAL CLIMATOLOGICAL DATA Monthly Summary
December 2010
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| 70.4*| 37.3 | 53.8*| 59.2 | 52| 78| 11| 0|.........| 0| 0.18| 0.0| 30.10| 29.69|29.852| 8.9| 7.1|211| 49| S| 0| 0| | |02| 47.0 | 29.8 | 38.4 | 39.4 | 30| 69| 26| 0|.........| 0| 0.00| 0.0| 30.22| 30.11|30.160| 2.5| 1.7|286| 16| N| 0| 0| | |03| 43.1 | 37.9 | 40.5 | 40.9 | 30| 65| 24| 0|.........| 0| 0.00| 0.0| 30.13| 30.04|30.087| 6.0| 5.4|350| 22|NNW| 0| 0| | |04| 41.9 | 29.9 | 35.9 | 36.6 | 26| 67| 29| 0|.........| 0| 0.01| 0.1| 30.09| 29.82|29.983| 4.6| 3.1|302| 19|NNW| 0| 0| | |05| 40.3 | 30.3 | 35.3 | 34.8 | 25| 70| 30| 0|.........| 0| 0.07| 0.7| 29.94| 29.79|29.856| 7.7| 6.6|311| 31| N| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |06| 38.6 | 25.0 | 31.8 | 31.5 | 18| 58| 33| 0|.........| 0| 0.00| 0.0| 29.94| 29.76|29.848| 7.7| 7.6|251| 30|WSW| 0| 0| | |07| 35.5 | 23.3 | 29.4 | 28.9 | 14| 54| 35| 0|.........| 0| 0.00| 0.0| 30.01| 29.79|29.858| 7.6| 7.2|259| 26|WSW| 0| 0| | |08| 34.9 | 19.7 | 27.3 | 27.7 | 14| 57| 37| 0|.........| 0| 0.00| 0.0| 30.23| 30.02|30.113| 3.8| 3.1|271| 18| NW| 0| 0| | |09| 35.7 | 21.9 | 28.8 | 30.2 | 17| 58| 36| 0|.........| 0| 0.00| 0.0| 30.41| 30.23|30.331| 4.1| 3.7|346| 20|NNW| 0| 0| | |10| 46.8 | 21.1 | 34.0 | 33.0 | 28| 82| 31| 0|.......8.| 0| 0.00| 0.0| 30.39| 30.25|30.322| 1.4| 1.2| 25| 18| N| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |11| 51.7 | 27.6 | 39.7 | 39.1 | 37| 92| 25| 0|1......8.| 0| 0.52| 0.0| 30.25| 29.88|30.160| 2.4| 2.3| 36| 19| NE| 0| 0| | |12| 57.8 | 43.9 | 50.8 | 52.5 | 51| 94| 14| 0|1........| 0| 0.49| 0.0| 29.82| 29.28|29.524| 4.8| 4.2|186| 28|SSW| 0| 0| | |13| 43.8 | 22.6 | 33.2 | 32.7 | 29| 86| 31| 0|.........1.5| 0.37| 1.5| 29.66| 29.28|29.431| 8.1| 5.9|265| 30|WNW| 0| 0| | |14| 27.6 | 18.4 | 23.0*| 23.3 | 10| 57| 42| 0|........ 1.5| 0.00| 0.0| 29.98| 29.67|29.815| 9.7| 9.3|253| 38|WSW| 0| 0| | |15| 32.1 | 15.1*| 23.6 | 23.5 | 11| 58| 41| 0|........ 0.8| 0.00| 0.0| 30.03| 29.95|29.995| 6.1| 6.0|252| 28|WSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |16| 32.6 | 17.5 | 25.0 | 27.2 | 23| 84| 39| 0|1..4.... 2.0| 0.43| 2.0| 30.02| 29.74|29.879| 0.2| 0.2|203| 14|SSW| 0| 0| | |17| 35.3 | 24.9 | 30.1 | 30.2 | 26| 84| 35| 0|.........1.0| 0.00| 0.0| 30.18| 29.85|30.055| 2.9| 2.3|341| 16| N| 0| 0| | |18| 39.5 | 23.5 | 31.5 | 32.9 | 29| 84| 33| 0|1........ .5| 0.05| T | 30.18| 30.01|30.111| 3.3| 3.3| 48| 20| NE| 0| 0| | |19| 37.7 | 30.4 | 34.0 | 34.4 | 27| 75| 31| 0|.........| T| 0.00| 0.0| 30.00| 29.94|29.967|10.0| 8.8| 6| 29| NE| 0| 0| | |20| 37.2 | 27.5 | 32.3 | 31.7 | 21| 65| 32| 0|.........| 0| 0.00| 0.0| 30.07| 29.95|30.020| 9.7| 9.1|324| 26| NW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |21| 41.1 | 27.6 | 34.3 | 33.3 | 22| 62| 30| 0|.........| 0| 0.00| 0.0| 30.09| 29.97|30.031| 6.0| 5.5|308| 25| NW| 0| 0| | |22| 43.1 | 32.4 | 37.8 | 37.5 | 24| 59| 27| 0|.........| 0| 0.00| 0.0| 30.00| 29.86|29.921| 2.8| 2.6|335| 24| NW| 0| 0| | |23| 42.6 | 32.3 | 37.4 | 36.9 | 24| 61| 27| 0|.........| 0| 0.00| 0.0| 30.08| 29.97|30.018|12.4|12.3|313| 32| NW| 0| 0| | |24| 39.8 | 25.2 | 32.5 | 33.2 | 23| 66| 32| 0|.........| 0| 0.00| 0.0| 30.19| 30.08|30.131| 6.7| 6.1|338| 26| NW| 0| 0| | |25| 40.2 | 25.8 | 33.0 | 33.5 | 27| 76| 32| 0|.........| 1| 0.10| 1.0| 30.12| 29.89|30.045| 1.7| 1.4| 37| 16| NE| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |26| 32.0 | 26.2 | 29.1 | 28.7 | 27| 95| 36| 0|1.......9|11| 0.84| 10.1| 29.90| 29.53|29.652| 1.4| 1.3|301| 30| N| 0| 0| | |27| 36.7 | 23.2 | 30.0 | 29.4 | 21| 72| 35| 0|........9|11| T | T | 29.99| 29.56|29.713| 8.3| 7.6|272| 30|WNW| 0| 0| | |28| 39.0 | 23.5 | 31.3 | 30.6 | 20| 67| 33| 0|.........|10| 0.00| 0.0| 30.14| 30.00|30.072| 5.3| 5.2|246| 27|WSW| 0| 0| | |29| 40.0 | 19.0 | 29.5 | 29.1 | 23| 78| 35| 0|.......8.| 8| 0.00| 0.0| 30.19| 30.06|30.112| 1.1| 1.0| 12| 18| N| 0| 0| | |30| 43.2 | 20.2 | 31.7 | 31.5 | 25| 78| 33| 0|1......8.| 6| 0.00| 0.0| 30.30| 30.18|30.249| 0.3| 0.1|326| 10|WSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |31| 52.7 | 25.1 | 38.9 | 37.4 | 30| 77| 26| 0|1........| 5| 0.00| 0.0| 30.28| 30.22|30.252| 1.0| 1.0|199| 15|SSW| 0| 0| | +--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ | Sum | Sum |------|------|---|----| Ttl| Ttl| |Total|Total| For the month: | ---- | +------+------+------+------+---+----+----+----+ Number of +-----+-----+------+------+------+----+----+---+---+---+---+---+------+ |1279.9| 808.1|------|------|---|----| 961| 0| Days | 3.06| 15.4| 30.41| 29.28|29.986| 5.1| 3.0|295| 49| S| 0| 0| ---- | +------+------+------+------+---+----+----+----+------------|-0.20" or 94% of normal +------+----+----+---+---+---+---+---+------+ | Avg | Avg | Avg | Mean |Avg| Avg|----|----|Precip | Season Ttl| Date | Date |------|----|----|---| Date | Date | Avg | +------+------+------+------+---+----+----+----+ +-----+-----+------+------+------+----+----+---+-------+-------+------+ | 41.4| 26.0| 33.7 | 33.9 | 25|72.0|----|----|>.01 Inch 10|57.44| 15.4| 9 | 12 |------|----|----|---| 1 | 1+ | | + -11.3 -9.5 -10.4 +------+---+----+----+----+------------|+8.71" or 118% of normal +------+----+----+---+-------+-------+------+ | | Season |Snow, Ice | | | | Number of Days | to Date |>1.0 Inch 4| Greatest in 24 Hours and Dates | Greatest Depth on Ground | +------------------+-----------------+----+----+------------+--------------+-----------------+ of Snow, Ice Pellets or Ice | | Max Temperature | Min Temperature |1531|2079|Thunder 0|Precipitation | Snow, Ice Plts | and Date | +--------+---------+--------+--------+----+----+------------+-------+------+---------+-------+-------------+----------------------+ | >90°F | <32°F | <32°F | <0°F |----|----|Heavy Fog 0| 0.94| 25-26| 10.1 | 26 | 11 | 26 & 27 | +--------+---------+--------+--------+----+----+------------+-------+------+---------+----+--+-------------+----------------------+ | 0 | 3 | 28 | 0 |----|----| Clear 14 Partly Cloudy 9 Cloudy 8 | +--------+---------+--------+--------+----+----+------------------------------------------+ 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:
  STATION RECORDS: W=wind S=snow T=temp p=previous
1st W 49 [p39 2004]
4th S 0.1" [no p s]
5th S 0.7" [no p s]
5th T Min max 40 [41 1991]
6th T Min 25 [p27 1992]
6th T Min Max 39 [p40 1997]
7th T Min 23 [p24 1984]
8th T Min 20 [p22 1976]
8th T Min Max 35 [p36 2006]
10th T Min 21 [p23 1977]
13th S 1.5" [no p s]
14th T Min 18 [p20 1982]
14th T Min Max 28 [p37 2005]
14th W 38 [p32 1991]
15th T Min 15 [p21 1985]
15th T Min Max 32 [39 2004]
16th T Min 17 [20 1988]
16th T Min Max 33
25th S 1.0"
26th S 10.1" [5.0" 2004] December 2010 was the coldest December in this station's database to 1976.
December 2010 was the SNOWIEST December in the database to 1976 with 15.4"
December 26th produced the 3RD GREATEST DAILY STATION SNOWFALL 10.1"
December 25th-27th produced the 4TH GREATEST SNOWSTORM EVENT TOTAL WITH 11.1"
MONTHLY AVERAGE MAXIMUM TEMP OF 41.4 WAS 11.3 BELOW NORMAL. MONTHLY AVERAGE MINIMUM TEMP OF 26.0 WAS 9.5 BELOW NORMAL. MONTHLY AVERAGE TEMP OF 33.7 WAS 10.4 BELOW NORMAL. MAXIMUM TEMP: 70 ON THE 1ST MINIMUM TEMP: 15 ON THE 15TH DAYS WITH TEMPERATURES: MAXIMUM >= 90: 0 MAXIMUM <= 32: 0 MINIMUM <= 32: 28 MINIMUM <= 0: 0 HEATING DEGREE DAYS: 971.0 COOLING DEGREE DAYS: 0.0 DAYS WITH HEATING DEGREE DAYS: 31 DAYS WITH COOLING DEGREE DAYS: 0 PRECIP TOTAL OF 3.06" WAS 0.20" BELOW NORMAL ( 94% OF NORMAL). GREATEST DAILY RAINFALL: 0.84" ON THE 26TH GREATEST 24-HOUR RAINFALL: 0.94" ON THE 25TH-36TH DAYS WITH MEASUREABLE PRECIP: 10 OR 32.26% AVERAGE DAILY PRECIP: 0.10" NORMAL DAILY PRECIP: 0.11" DAYS WITH PRECIP >= 0.01" 10 DAYS WITH PRECIP >= 0.10" 7 DAYS WITH PRECIP >= 0.50" 2 DAYS WITH PRECIP >= 1.00" 0 DAYS WITH THUNDERSTORMS: 0 NUMBER OF THUNDERSTORMS: 0 DAYS WITH SNOW: 08 SNOWFALL TOTAL: 15.4" SEASONAL SNOWFALL 2010-2011: 15.4" CLOUDY DAYS: 8 PARTLY CLOUDY DAYS: 9 SUNNY/CLEAR DAYS: 14 DAYS WITH F/GF: 7 DAYS WITH DENSE FOG: 0 DAYS WITH FROST: 3 YEAR-TO-DATE YEARLY AVERAGE MAXIMUM TEMP OF 69.5 WAS 0.1 BELOW NORMAL. YEARLY AVERAGE MINIMUM TEMP OF 50.8 WAS 0.6 BELOW NORMAL. YEARLY AVERAGE TEMP OF 60.2 WAS 0.3 BELOW NORMAL. MAXIMUM TEMP: 104 ON JULY 24th and 25th MINIMUM TEMP: 15 ON DECEMBER 15TH DAYS WITH TEMPERATURES: MAXIMUM >= 90: 68 MAXIMUM <= 32: 8 MINIMUM <= 32: 79 MINIMUM <= 0: 0 HEATING DEGREE DAYS: 2825.0 COOLING DEGREE DAYS: 2029.0 DAYS WITH HEATING DEGREE DAYS: 170 DAYS WITH COOLING DEGREE DAYS: 164 PRECIP TOTAL OF 54.38" WAS + 8.93" ABOVE NORMAL ( 120% OF NORMAL ). GREATEST DAILY RAINFALL: 9.10" ON SEPTEMBER 30TH GREATEST 24-HOUR RAINFALL: 9.10" ON SEPTEMBER 30TH DAYS WITH MEASUREABLE PRECIP: 109 OF 365 OR 29.86% AVERAGE DAILY PRECIP: 0.16" NORMAL DAILY PRECIP: 0.14" DAYS WITH PRECIP >= 0.01" 109 DAYS WITH PRECIP >= 0.10" 68 DAYS WITH PRECIP >= 0.50" 34 DAYS WITH PRECIP >= 1.00" 15 DAYS WITH THUNDERSTORMS: 28 NUMBER OF THUNDERSTORMS: 29 DAYS WITH SNOW (calendar year 2010): 16 SNOWFALL TOTAL (calendar year 2010): 24.9" SEASONAL SNOW 2010-2011 (beginning December 2010): 15.4" CLOUDY DAYS: 56 PARTLY CLOUDY DAYS: 144 SUNNY/CLEAR DAYS: 165 DAYS WITH F/GF: 93 DAYS WITH DENSE FOG: 13 DAYS WITH FROST: 34
OBSERVATIONS AT 3-HOUR INTERVALS
December 2010: 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| |29.93| 0.00| 67| 63| 88|15| 6| 25| |30.11| 0.00| 36| 28| 70|24| 5| 15| |30.10| 0.00| 43| 34| 71|33| 4| 14| |04| |29.82| 0.00| 65| 64| 96|15| 6| 24| |30.15| 0.00| 34| 27| 74|24| 4| 11| |30.11| 0.00| 41| 32| 70|04| 5| 15| |07| |29.74| 0.01| 67| 66| 96|15| 7| 32| |30.19| 0.00| 30| 26| 84|33| 0| 7| |30.13| 0.00| 39| 29| 69|33| 11| 22| |10| |29.72| 0.10| 68| 66| 93|18| 10| 49| |30.22| 0.00| 42| 31| 65|00| 4| 12| |30.13| 0.00| 40| 28| 61|00| 10| 20| |13| |29.73| 0.00| 64| 54| 71|20| 12| 29| |30.16| 0.00| 46| 32| 58|24| 4| 12| |30.06| 0.00| 43| 30| 59|31| 7| 18| |16| |29.84| 0.00| 57| 42| 57|24| 13| 30| |30.15| 0.00| 46| 31| 55|31| 4| 10| |30.04| 0.00| 42| 29| 59|31| 6| 16| |19| |30.00| 0.00| 45| 32| 59|24| 11| 28| |30.17| 0.00| 40| 32| 72|00| 0| 0| |30.08| 0.00| 41| 29| 63|29| 4| 7| |22| |30.07| 0.00| 40| 29| 64|24| 6| 18| |30.15| 0.00| 40| 33| 76|31| 0| 5| |30.08| 0.00| 41| 30| 65|31| 4| 15| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 4 | DEC 5 | DEC 6 | | | | | |01| |30.07| 0.00| 40| 30| 67|00| 6| 17| |29.80| 0.01| 32| 30| 93|00| 4| 10| |29.94| 0.00| 29| 18| 62|24| 5| 17| |04| |30.08| 0.00| 35| 27| 72|00| 6| 12| |29.80| 0.02| 33| 30| 90|00| 5| 14| |29.92| 0.00| 26| 17| 68|24| 4| 11| |07| |30.08| 0.00| 31| 24| 75|31| 0| 7| |29.84| 0.00| 31| 28| 90|27| 3| 14| |29.91| 0.00| 25| 18| 74|24| 5| 14| |10| |30.07| 0.00| 36| 26| 66|31| 6| 18| |29.88| 0.00| 35| 23| 61|00| 17| 31| |29.89| 0.00| 33| 22| 62|24| 7| 21| |13| |29.96| 0.00| 40| 25| 54|29| 3| 16| |29.84| 0.00| 39| 24| 54|31| 13| 26| |29.80| 0.00| 38| 19| 46|24| 12| 30| |16| |29.91| 0.00| 41| 26| 54|24| 6| 10| |29.86| 0.00| 40| 25| 55|29| 11| 25| |29.76| 0.00| 37| 18| 45|24| 11| 29| |19| |29.89| 0.00| 38| 26| 63|20| 5| 12| |29.90| 0.00| 35| 23| 62|24| 4| 14| |29.79| 0.00| 33| 18| 52|24| 10| 22| |22| |29.85| 0.00| 33| 30| 91|22| 0| 6| |29.93| 0.00| 35| 21| 56|31| 7| 21| |29.80| 0.00| 30| 16| 55|24| 7| 20| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 7 | DEC 8 | DEC 9 | | | | | |01| |29.80| 0.00| 27| 15| 60|24| 7| 19| |30.02| 0.00| 26| 14| 58|24| 5| 15| |30.23| 0.00| 30| 15| 53|00| 6| 16| |04| |29.79| 0.00| 25| 14| 61|24| 10| 21| |30.06| 0.00| 23| 12| 64|24| 4| 12| |30.26| 0.00| 29| 15| 56|00| 5| 12| |07| |29.82| 0.00| 24| 14| 65|24| 6| 15| |30.10| 0.00| 20| 12| 69|24| 0| 10| |30.30| 0.00| 28| 16| 61|33| 5| 12| |10| |29.86| 0.00| 30| 14| 51|24| 11| 26| |30.14| 0.00| 29| 14| 53|24| 6| 15| |30.37| 0.00| 33| 16| 50|33| 7| 18| |13| |29.82| 0.00| 35| 15| 44|29| 10| 25| |30.09| 0.00| 33| 15| 47|24| 6| 16| |30.33| 0.00| 35| 17| 48|04| 7| 15| |16| |29.85| 0.00| 35| 15| 43|29| 10| 22| |30.11| 0.00| 35| 15| 44|24| 5| 15| |30.34| 0.00| 35| 17| 46|29| 4| 12| |19| |29.93| 0.00| 29| 14| 52|24| 4| 14| |30.17| 0.00| 28| 15| 60|00| 0| 0| |30.38| 0.00| 27| 17| 67|00| 0| 0| |22| |29.98| 0.00| 28| 13| 54|24| 5| 16| |30.19| 0.00| 28| 18| 65|00| 0| 0| |30.41| 0.00| 24| 17| 77|06| 0| 6| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 10 | DEC 11 | DEC 12 | | | | | |01| |30.38| 0.00| 22| 17| 83|00| 0| 0| |30.25| 0.00| 28| 27| 93|00| 0| 0| |29.82| 0.05| 52| 52| 98|13| 4| 16| |04| |30.38| 0.00| 22| 19| 87|00| 0| 0| |30.24| 0.00| 28| 26| 93|00| 0| 0| |29.70| 0.00| 57| 56| 98|15| 5| 17| |07| |30.36| 0.00| 24| 21| 89|00| 0| 0| |30.24| 0.00| 32| 31| 95|06| 0| 5| |29.66| 0.00| 54| 52| 94|20| 10| 25| |10| |30.35| 0.00| 40| 31| 71|04| 4| 10| |30.24| 0.00| 44| 37| 77|04| 5| 14| |29.67| 0.00| 52| 50| 90|20| 6| 21| |13| |30.28| 0.00| 45| 35| 67|13| 0| 10| |30.17| 0.00| 47| 42| 83|04| 6| 15| |29.49| 0.00| 53| 49| 86|20| 0| 11| |16| |30.27| 0.00| 44| 36| 73|33| 5| 14| |30.15| 0.06| 44| 43| 95|04| 4| 10| |29.36| 0.03| 53| 51| 94|15| 0| 10| |19| |30.29| 0.00| 36| 33| 88|06| 0| 4| |30.08| 0.00| 42| 41| 96|00| 4| 12| |29.31| 0.03| 51| 50| 97|20| 4| 15| |22| |30.26| 0.00| 30| 28| 92|00| 0| 0| |29.97| 0.04| 46| 45| 97|06| 0| 7| |29.28| 0.00| 47| 45| 95|20| 4| 16| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 13 | DEC 14 | DEC 15 | | | | | |01| |29.30| 0.00| 43| 41| 93|20| 6| 17| |29.67| 0.00| 22| 13| 67|24| 7| 19| |29.98| 0.00| 19| 8| 62|24| 4| 14| |04| |29.28| 0.00| 40| 38| 91|20| 6| 21| |29.71| 0.00| 21| 11| 65|24| 10| 23| |30.01| 0.00| 18| 9| 66|24| 6| 15| |07| |29.34| 0.01| 34| 32| 92|24| 11| 23| |29.78| 0.00| 20| 10| 64|24| 11| 24| |30.03| 0.00| 15| 8| 73|24| 5| 12| |10| |29.42| 0.05| 31| 29| 93|24| 10| 23| |29.82| 0.00| 23| 10| 58|24| 13| 35| |30.03| 0.00| 24| 12| 58|24| 10| 23| |13| |29.41| 0.05| 31| 29| 92|00| 7| 20| |29.80| 0.00| 26| 10| 52|24| 13| 38| |29.95| 0.00| 31| 12| 46|24| 11| 22| |16| |29.47| 0.00| 30| 27| 88|24| 7| 21| |29.83| 0.00| 27| 10| 47|24| 13| 30| |29.96| 0.00| 32| 12| 44|24| 10| 23| |19| |29.55| 0.00| 29| 21| 72|29| 11| 27| |29.89| 0.00| 25| 10| 52|24| 4| 14| |29.98| 0.00| 25| 12| 56|24| 0| 10| |22| |29.63| 0.00| 25| 14| 64|29| 11| 25| |29.97| 0.00| 24| 8| 51|31| 5| 15| |30.00| 0.00| 23| 12| 62|24| 4| 6| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 16 | DEC 17 | DEC 18 | | | | | |01| |30.01| 0.00| 21| 12| 67|24| 0| 5| |29.85| 0.00| 33| 32| 96|31| 4| 12| |30.18| 0.00| 24| 22| 93|00| 0| 0| |04| |29.99| 0.00| 18| 12| 78|00| 0| 0| |29.92| 0.00| 29| 27| 92|00| 5| 14| |30.17| 0.00| 26| 24| 94|00| 0| 0| |07| |29.99| 0.00| 23| 16| 74|24| 0| 5| |29.98| 0.00| 26| 24| 91|00| 0| 10| |30.17| 0.00| 27| 26| 94|00| 0| 0| |10| |29.95| 0.05| 30| 20| 64|22| 0| 10| |30.09| 0.00| 30| 27| 88|24| 4| 11| |30.18| 0.00| 36| 28| 72|04| 5| 14| |13| |29.82| 0.05| 31| 28| 90|15| 0| 11| |30.08| 0.00| 34| 24| 66|00| 6| 15| |30.10| 0.00| 39| 31| 74|04| 5| 15| |16| |29.75| 0.03| 32| 31| 94|22| 0| 4| |30.11| 0.00| 35| 24| 64|02| 0| 6| |30.06| 0.00| 39| 31| 73|04| 6| 15| |19| |29.77| 0.00| 32| 31| 95|22| 0| 4| |30.15| 0.00| 29| 25| 85|00| 0| 0| |30.03| 0.00| 37| 32| 81|04| 6| 16| |22| |29.80| 0.00| 33| 32| 96|22| 0| 6| |30.18| 0.00| 26| 24| 91|00| 0| 0| |30.03| 0.01| 35| 33| 91|04| 6| 15| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
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 | 0.20 | 0.21 | 0.23 | 0.24 | 0.26 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Date | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Time | 1604 | 1710 | 1713 | 1720 | 1730 | 1743 | 1800 | 1800 | 1800 | 1800 | 1800 | 1700 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ 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 2010: 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| |30.00| 0.00| 34| 32| 95|04| 7| 18| |29.95| 0.00| 30| 21| 70|00| 12| 24| |30.07| 0.00| 31| 21| 65|31| 12| 22| |04| |29.97| 0.00| 34| 30| 85|04| 7| 18| |29.98| 0.00| 28| 19| 70|31| 10| 20| |30.06| 0.00| 29| 19| 66|29| 5| 16| |07| |29.98| 0.00| 34| 29| 80|00| 10| 19| |30.00| 0.00| 28| 20| 73|31| 12| 22| |30.06| 0.00| 28| 19| 68|29| 6| 18| |10| |30.00| 0.00| 35| 29| 76|00| 12| 23| |30.04| 0.00| 32| 22| 67|00| 13| 26| |30.07| 0.00| 34| 23| 64|29| 10| 23| |13| |29.95| 0.00| 37| 27| 67|00| 13| 26| |30.01| 0.00| 35| 23| 60|31| 12| 24| |29.99| 0.00| 40| 23| 50|31| 11| 22| |16| |29.95| 0.00| 37| 26| 64|00| 11| 24| |30.02| 0.00| 37| 24| 59|31| 11| 24| |29.98| 0.00| 40| 24| 54|00| 7| 19| |19| |29.96| 0.00| 33| 24| 68|00| 10| 21| |30.05| 0.00| 33| 21| 62|29| 4| 16| |30.01| 0.00| 32| 23| 68|31| 0| 5| |22| |29.96| 0.00| 31| 22| 70|31| 7| 18| |30.06| 0.00| 32| 21| 62|31| 7| 21| |30.01| 0.00| 32| 22| 66|22| 0| 7| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 22 | DEC 23 | DEC 24 | | | | | |01| |30.00| 0.00| 36| 24| 62|29| 0| 10| |29.97| 0.00| 36| 25| 65|31| 11| 24| |30.08| 0.00| 34| 24| 67|31| 11| 22| |04| |29.95| 0.00| 36| 24| 61|31| 0| 7| |30.00| 0.00| 33| 24| 69|31| 11| 23| |30.11| 0.00| 32| 22| 65|31| 11| 22| |07| |29.93| 0.00| 34| 24| 67|33| 0| 5| |30.03| 0.00| 32| 22| 65|31| 13| 27| |30.15| 0.00| 30| 21| 69|00| 10| 20| |10| |29.94| 0.00| 40| 25| 55|00| 5| 11| |30.04| 0.00| 36| 24| 61|31| 13| 26| |30.19| 0.00| 34| 23| 65|00| 11| 20| |13| |29.86| 0.00| 41| 26| 53|33| 6| 14| |29.98| 0.00| 41| 26| 54|31| 15| 30| |30.13| 0.00| 38| 24| 58|29| 6| 16| |16| |29.87| 0.00| 42| 25| 50|31| 6| 17| |30.00| 0.00| 42| 26| 51|31| 14| 28| |30.11| 0.00| 40| 25| 55|31| 6| 15| |19| |29.91| 0.00| 36| 24| 60|31| 0| 7| |30.04| 0.00| 39| 25| 59|31| 11| 24| |30.13| 0.00| 31| 22| 70|29| 0| 5| |22| |29.94| 0.00| 37| 24| 58|31| 5| 16| |30.07| 0.00| 36| 24| 63|31| 13| 29| |30.13| 0.00| 27| 22| 81|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 25 | DEC 26 | DEC 27 | | | | | |01| |30.11| 0.00| 27| 23| 85|00| 0| 5| |29.90| 0.02| 32| 31| 95|00| 0| 0| |29.56| 0.00| 26| 25| 95|29| 6| 17| |04| |30.10| 0.00| 29| 25| 85|00| 0| 0| |29.81| 0.02| 31| 30| 94|00| 0| 0| |29.59| 0.00| 24| 22| 93|27| 5| 16| |07| |30.10| 0.00| 31| 26| 79|29| 0| 5| |29.70| 0.05| 30| 29| 96|00| 0| 0| |29.61| 0.00| 25| 23| 91|24| 7| 23| |10| |30.09| 0.00| 35| 27| 72|29| 0| 10| |29.65| 0.05| 29| 28| 96|00| 0| 0| |29.67| 0.00| 29| 25| 85|24| 11| 25| |13| |30.01| 0.00| 40| 27| 60|04| 0| 7| |29.55| 0.06| 28| 27| 96|00| 0| 0| |29.69| 0.00| 33| 21| 61|29| 13| 28| |16| |30.00| 0.00| 38| 29| 70|29| 4| 10| |29.54| 0.08| 27| 26| 96|00| 0| 0| |29.75| 0.00| 36| 18| 48|29| 12| 30| |19| |29.99| 0.00| 35| 27| 72|04| 5| 12| |29.57| 0.01| 27| 26| 95|31| 6| 15| |29.83| 0.00| 33| 17| 52|24| 6| 21| |22| |29.98| 0.02| 32| 30| 91|06| 4| 11| |29.58| 0.00| 26| 25| 95|29| 5| 14| |29.94| 0.00| 30| 18| 59|24| 10| 21| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 28 | DEC 29 | DEC 30 | | | | | |01| |30.00| 0.00| 28| 18| 64|24| 11| 22| |30.07| 0.00| 23| 19| 85|24| 0| 5| |30.18| 0.00| 24| 22| 91|00| 0| 0| |04| |30.07| 0.00| 29| 19| 64|24| 10| 27| |30.06| 0.00| 21| 17| 85|24| 0| 5| |30.20| 0.00| 22| 20| 92|00| 0| 0| |07| |30.11| 0.00| 27| 17| 66|24| 4| 12| |30.10| 0.00| 19| 16| 86|27| 0| 5| |30.26| 0.00| 21| 19| 92|00| 0| 0| |10| |30.14| 0.00| 30| 18| 61|24| 7| 17| |30.13| 0.00| 30| 22| 71|27| 0| 5| |30.30| 0.00| 35| 27| 72|33| 0| 6| |13| |30.06| 0.00| 37| 23| 56|24| 7| 22| |30.09| 0.00| 40| 27| 60|00| 6| 16| |30.26| 0.00| 43| 26| 50|04| 0| 6| |16| |30.03| 0.00| 38| 25| 60|24| 6| 18| |30.10| 0.00| 39| 27| 62|33| 0| 11| |30.25| 0.00| 41| 30| 63|04| 0| 5| |19| |30.07| 0.00| 29| 23| 79|00| 0| 0| |30.15| 0.00| 31| 27| 84|00| 0| 0| |30.25| 0.00| 36| 29| 78|00| 0| 0| |22| |30.07| 0.00| 26| 21| 81|24| 0| 5| |30.19| 0.00| 28| 25| 88|00| 0| 0| |30.27| 0.00| 32| 29| 88|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 31 | | | | | | | |01| |30.25| 0.00| 29| 27| 90|04| 0| 4| | | |04| |30.25| 0.00| 27| 25| 92|00| 0| 0| | | |07| |30.28| 0.00| 25| 23| 93|00| 0| 0| | | |10| |30.27| 0.00| 38| 30| 74|20| 0| 10| | | |13| |30.23| 0.00| 48| 35| 60|20| 4| 11| | | |16| |30.22| 0.00| 52| 37| 57|20| 4| 14| | | |19| |30.25| 0.00| 42| 34| 74|00| 0| 0| | | |22| |30.25| 0.00| 39| 33| 78|20| 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| |30.002| 32| 25| 78| 4.3| 30 | 2.3| |04| |30.001| 30| 24| 79| 4.2| 29 | 2.1| |07| |30.017| 29| 24| 81| 4.1| 28 | 2.5| |10| |30.033| 35| 26| 70| 6.6| 30 | 3.3| |13| |29.974| 40| 27| 62| 6.8| 30 | 4.1| |16| |29.973| 40| 27| 62| 6.2| 29 | 4.3| |19| |30.001| 35| 26| 71| 3.3| 29 | 1.9| |22| |30.016| 33| 25| 75| 3.3| 29 | 2.4| +--+----+------+---+---+---+-----+----+----+
HOURLY PRECIPITATION (Water Equivalent)
December 2010: 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| | |0.02|0.02| | |0.01|0.01|0.01|0.01|0.10| | | | | | | | | | | | | |01 02| | | | | | | | | | | | | | | | | | | | | | | | |02 03| | | | | | | | | | | | | | | | | | | | | | | | |03 04| | | | | | | | | | | | | | | | | | | | | | | |0.01|04 05| |0.01|0.01|0.02|0.02|0.01| | | | | | | | | | | | | | | | | | |05 | | | | | | | | | | | | | | | | | | | | | | | | | 06| | | | | | | | | | | | | | | | | | | | | | | | |06 07| | | | | | | | | | | | | | | | | | | | | | | | |07 08| | | | | | | | | | | | | | | | | | | | | | | | |08 09| | | | | | | | | | | | | | | | | | | | | | | | |09 10| | | | | | | | | | | | | | | | | | | | | | | | |10 | | | | | | | | | | | | | | | | | | | | | | | | | 11| | | | | | | | | | | | | | |0.03|0.06|0.06|0.13|0.05| |0.07|0.02|0.04|0.06|11 12| |0.05|0.13| | | | | | | | | | | | | |0.03|0.04|0.18|0.03| |0.03| | |12 13| | | | | | |0.02|0.01|0.05|0.05|0.05|0.05|0.05|0.05|0.04| | | | | | | | | |13 14| | | | | | | | | | | | | | | | | | | | | | | | |14 15| | | | | | | | | | | | | | | | | | | | | | | | |15 | | | | | | | | | | | | | | | | | | | | | | | | | 16| | | | | | | | |0.01|0.05|0.05|0.05|0.05|0.05|0.05|0.04|0.03|0.03|0.01| | | | |0.01|16 17| | | | | | | | | | | | | | | | | | | | | | | | |17 18| | | | | | | | | | | | | | | | | | | | | |0.01|0.01|0.03|18 19| | | | | | | | | | | | | | | | | | | | | | | | |19 20| | | | | | | | | | | | | | | | | | | | | | | | |20 | | | | | | | | | | | | | | | | | | | | | | | | | 21| | | | | | | | | | | | | | | | | | | | | | | | |21 22| | | | | | | | | | | | | | | | | | | | | | | | |22 23| | | | | | | | | | | | | | | | | | | | | | | | |23 24| | | | | | | | | | | | | | | | | | | | | | | | |24 25| | | | | | | | | | | | | | | | | | | | | |0.02|0.02|0.06|25 | | | | | | | | | | | | | | | | | | | | | | | | | 26| |0.02|0.02|0.02|0.02|0.03|0.04|0.05|0.05|0.05|0.05|0.06|0.06|0.06|0.08|0.08|0.08|0.03|0.03|0.01| | | | |26 27| | | | | | | | | | | | | | | | | | | | | | | | |27 28| | | | | | | | | | | | | | | | | | | | | | | | |28 29| | | | | | | | | | | | | | | | | | | | | | | | |29 30| | | | | | | | | | | | | | | | | | | | | | | | |30 31| | | | | | | | | | | | | | | | | | | | | | | | |31 ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- Sum| |0.08|0.18|0.06|0.04|0.04|0.07|0.07|0.12|0.16|0.25|0.16|0.16|0.16|0.20|0.18|0.20|0.23|0.27|0.04|0.07|0.08|0.07|0.17|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.)