LOCAL CLIMATOLOGICAL DATA Monthly Summary
December 2017
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| 56.0 | 38.9 | 47.5 | 50.6 | 44| 80| 17| 0|.........| 0| 0.00| 0.0| 30.26| 30.02|30.162| 1.8| 1.8| 45| 29| NE| 0| 0| | |02| 58.2 | 34.3 | 46.3 | 46.7 | 42| 85| 19| 0|1........| 0| T | 0.0| 30.26| 30.17|30.214| 0.3| 0.3| 45| 14| NE| 0| 0| | |03| 59.5 | 41.9 | 50.7 | 52.0 | 47| 85| 14| 0|1........| 0| 0.00| 0.0| 30.27| 30.12|30.173| 0.0| 0.0| 0| 15| NW| 0| 0| | |04| 59.0 | 37.0 | 48.0 | 48.0 | 37| 93| 25| 0|1........| 0| 0.00| 0.0| 30.33| 30.25|30.293| 0.0| 0.0| 0| 0| N| 0| 0| | |05| 69.0*| 45.0 | 57.0 | 57.0 | M| M| 8| 0|.........| 0| 0.01| 0.0| 30.30| 29.96|30.030| M| M| M| 14| NE| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |06| 64.0 | 42.9 | 53.5 | 53.5 | M| 75| 13| 0|.........| 0| 0.35| 0.0| 30.09| 30.04|30.066| 1.3| 1.3| 45| 20| NE| 0| 0| | |07| 49.5 | 42.1 | 45.8 | 44.5 | 40| 86| 19| 0|1........| 0| 0.02| 0.0| 30.13| 30.05|30.085| 0.0| 0.0| 0| 10|SSW| 0| 0| | |08| 44.4 | 37.0 | 40.7 | 41.3 | 39| 93| 24| 0|1........| 0| 1.25| 0.0| 30.10| 29.94|30.027| 1.3| 1.1| 20| 22| N| 0| 0| | |09| 39.9 | 34.7 | 37.3 | 37.8 | 37| 98| 27| 0|1........| 0| 0.62| T | 29.92| 29.72|29.812| 1.6| 1.5| 25| 26| NE| 0| 0| | |10| 42.0 | 30.5 | 36.3 | 36.0 | 31| 85| 28| 0|.........| 0| 0.00| 0.0| 30.14| 29.90|30.062| 0.7| 0.7|293| 24|WNW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |11| 48.3 | 29.9 | 39.1 | 38.3 | 32| 80| 26| 0|.........| 0| 0.00| 0.0| 30.11| 29.93|30.038| 1.0| 0.6|294| 17|SSW| 0| 0| | |12| 53.8 | 32.5 | 43.2 | 43.7 | 36| 75| 21| 0|.........| 0| 0.01| T | 29.88| 29.52|29.652| 2.9| 1.9|279| 38|WNW| 0| 0| | |13| 37.9 | 25.1 | 31.5 | 31.9 | 15| 51| 33| 0|.........| 0| T | T | 29.91| 29.71|29.821| 0.8| 0.8|275| 33|WNW| 0| 0| | |14| 53.0 | 34.8 | 43.9 | 42.1 | 29| 59| 21| 0|.........| 0| 0.00| 0.0| 30.08| 29.62|29.829| 0.3| 0.3|270| 25| W| 0| 0| | |15| 50.5 | 30.2 | 40.3 | 39.9 | 32| 73| 24| 0|.........| 0| 0.00| 0.0| 30.06| 29.83|29.974| 0.2| 0.2|270| 22|WSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |16| 46.9 | 25.2 | 36.1 | 35.1 | 26| 71| 29| 0|.........| 0| 0.00| 0.0| 30.24| 30.08|30.179| 0.0| 0.0| 0| 14|SSW| 0| 0| | |17| 53.3 | 29.5 | 41.4 | 41.6 | 33| 72| 23| 0|.........| 0| T | 0.0| 30.28| 30.15|30.218| 0.0| 0.0| 0| 11| SW| 0| 0| | |18| 60.6 | 38.8 | 49.7 | 48.7 | 42| 77| 15| 0|.........| 0| 0.00| 0.0| 30.15| 30.00|30.075| 1.5| 1.3|268| 18| W| 0| 0| | |19| 63.9 | 41.4 | 52.7 | 51.7 | 45| 78| 12| 0|1........| 0| 0.00| 0.0| 30.04| 29.88|29.968| 2.0| 1.8|259| 20| W| 0| 0| | |20| 58.7 | 46.8 | 52.8 | 54.0 | 41| 63| 12| 0|.........| 0| 0.00| 0.0| 30.01| 29.87|29.944| 2.6| 1.4| 41| 18| NE| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |21| 48.8 | 35.5 | 42.2 | 43.1 | 33| 69| 22| 0|.........| 0| 0.00| 0.0| 30.26| 30.00|30.162| 3.2| 2.7| 41| 20| NE| 0| 0| | |22| 60.5 | 35.7 | 48.1 | 49.3 | 46| 87| 16| 0|.........| 0| 0.01| 0.0| 30.24| 30.12|30.174| 0.0| 0.0| 0| 12| SE| 0| 0| | |23| 68.9*| 50.3*| 59.6*| 60.4 | 56| 86| 5| 0|.........| 0| 0.06| 0.0| 30.08| 29.83|29.950| 2.0| 2.0|207| 27| SW| 0| 0| | |24| 63.4 | 42.7 | 53.1 | 46.7 | 43| 87| 12| 0|1........| 0| 0.01| 0.0| 30.16| 29.86|30.029| 5.2| 5.0| 48| 32| NE| 0| 0| | |25| 45.2 | 35.1 | 40.2 | 40.6 | 26| 59| 25| 0|.........| 0| 0.00| 0.0| 30.37| 29.83|30.123| 2.0| 1.9|278| 29| W| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |26| 42.3 | 30.0 | 36.2 | 36.2 | 21| 55| 29| 0|.........| 0| 0.00| 0.0| 30.50| 30.34|30.444| 0.0| 0.0| 0| 12|WNW| 0| 0| | |27| 41.9 | 29.2 | 35.6 | 36.8 | 28| 71| 29| 0|.........| 0| 0.00| 0.0| 30.51| 30.35|30.423| 1.8| 1.4| 25| 26| NE| 0| 0| | |28| 29.2 | 20.2 | 24.7*| 24.5 | 11| 56| 40| 0|.........| 0| T | T | 30.63| 30.46|30.547| 0.3| 0.3|315| 24| NW| 0| 0| | |29| 38.3 | 19.4*| 28.8 | 28.6 | 17| 62| 36| 0|.........| 0| 0.00| 0.0| 30.43| 30.21|30.309| 0.0| 0.0| 0| 18|WNW| 0| 0| | |30| 48.3 | 27.1 | 37.7 | 36.8 | 26| 66| 27| 0|.........| 0| 0.00| 0.0| 30.22| 29.92|30.065| 0.0| 0.0| 0| 20| SW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |31| 33.4 | 21.8 | 27.6 | 26.4 | 9| 47| 37| 0|.........| 0| 0.00| 0.0| 30.39| 30.14|30.289| 0.8| 0.8|333| 25|NNW| 0| 0| | +--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ | Sum | Sum |------|------|---|----| Ttl| Ttl| |Total|Total| For the month: | ---- | +------+------+------+------+---+----+----+----+ Number of +-----+-----+------+------+------+----+----+---+---+---+---+---+------+ |1590.3|1063.3|------|------|---|----| 694| 0| Days | 2.34| T | 30.63| 29.52|30.104| 1.1| 0.4|357| 38|WNW| 0| 0| ---- | +------+------+------+------+---+----+----+----+------------|-0.97" or 71% of normal +------+----+----+---+---+---+---+---+------+ | Avg | Avg | Avg | Mean |Avg| Avg|----|----|Precip | Season Ttl| Date | Date |------|----|----|---| Date | Date | Avg | +------+------+------+------+---+----+----+----+ +-----+-----+------+------+------+----+----+---+-------+-------+------+ | 51.3| 34.3| 42.8 | 42.8 | 33|74.0|----|----|≥.01 Inch 8|52.04| T | 28 | 12 |------|----|----|---| 12 | 1+ | | + -2.0 -1.8 -1.9 +------+---+----+----+----+------------|+1.66" or 103% 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 |1162|2011|Thunder 0|Precipitation | Snow, Ice Plts | and Date | +--------+---------+--------+--------+----+----+------------+-------+------+---------+-------+-------------+----------------------+ | ≥90°F | ≤32°F | ≤32°F | ≤0°F |----|----|Heavy Fog 0| 1.69| 8- 9| T | 9+ | 0 | - | +--------+---------+--------+--------+----+----+------------+-------+------+---------+----+--+-------------+----------------------+ | 0 | 1 | 12 | 0 |----|----| Clear 8 Partly Cloudy 13 Cloudy 10 | +--------+---------+--------+--------+----+----+------------------------------------------+ NOTES: Data in column 4A are (MAX+MIN) / 2, whereas data in columns 4B, 5, 6, 15, 16, 23 are means via continuous observations Units are: Temperature=°F, Wind=mph, Pressure=Inches Hg, Precipitation=inches. for 24 hours. Column 5: Dew point is calculated from temperature and humidity and is continuously averaged for 24 hours. Columns 7, 8: Degree Days heating base is 65°F, cooling base is 65°F. Data in columns 9, 10, 12 are entered manually by the station observer. Columns 17-18: Resultant wind is calculated by the vector sum of continuous wind observations. Column 23: Solar Radiation is measured in Watts/m^2 and is continuously averaged for 24 hours. Data in columns 4B, 5, 6, 15, 16, 23 are updated continuously, there by achieving a "true" mean. OBSERVER NOTES: FROPA: 1st, 7th, 9th, 12th, 22nd, 23rd 11:59PM & 24th 12:01AM (same); 25th, 27th, 30th
FROST: 2nd, 4th, 10th, 11th, 15th, 16th, 17th, 29th, 30th
STATION RECORDS:
8th - RAINFALL 1.62" [ previous 0.93" 1989 ]
28th - TEMPERATURE Minimum 20 [ previously 22 2004 ]
28th - TEMPERATURE Minimum High 29 [ previously 33 2000 ]

   MONTHLY AVERAGE MAXIMUM TEMP OF 51.3 WAS  2.0 BELOW NORMAL
   MONTHLY AVERAGE MINIMUM TEMP OF 34.3 WAS  1.3 BELOW NORMAL
   MONTHLY AVERAGE TEMPERATURE  OF 42.8 WAS  1.9 BELOW NORMAL

   MAXIMUM TEMP:  69 ON THE  5th and 23rd
   MINIMUM TEMP:  19 ON THE 29th

   DAYS WITH TEMPERATURES:
        MAXIMUM >= 90:   0
        MAXIMUM <= 32:   1
        MINIMUM <= 32:  13
        MINIMUM <=  0:   0

   HEATING DEGREE DAYS:  689.0 
   COOLING DEGREE DAYS:    0.0

   DAYS WITH HEATING DEGREE DAYS:   31
   DAYS WITH COOLING DEGREE DAYS:    0

   PRECIP TOTAL OF  2.34" WAS 0.97" BELOW NORMAL (71% OF NORMAL)
   
   GREATEST DAILY RAINFALL:    1.25" on the   8th   
   GREATEST 24-HOUR RAINFALL:  1.69" on the 8-9th

   DAYS WITH MEASUREABLE PRECIP: 9 OF 31 DAYS OR 29.03% 
   AVERAGE DAILY PRECIP: 0.08"
   NORMAL DAILY PRECIP:  0.11"
                                   
   DAYS WITH PRECIP >= 0.01"     9 
   DAYS WITH PRECIP >= 0.10"     3 
   DAYS WITH PRECIP >= 0.50"     2
   DAYS WITH PRECIP >= 1.00"     1

   DAYS WITH THUNDERSTORMS:   0   
   NUMBER OF THUNDERSTORMS:   0 

   DAYS WITH SNOW:     4  
   SNOWFALL TOTAL:   TRACE 
   SEASONAL SNOWFALL 2017-2018 (beginning November 2017): TRACE

   CLOUDY DAYS:          10
   PARTLY CLOUDY DAYS    13 
   SUNNY/CLEAR DAYS:      8
   DAYS WITH F/GF:        8
   DAYS WITH DENSE FOG:   0 
   DAYS WITH FROST:       9

   YEAR-TO-DATE

   YEARLY  AVERAGE MAXIMUM TEMP OF 71.6 WAS 1.9 ABOVE NORMAL
   YEARLY  AVERAGE MINIMUM TEMP OF 53.7 WAS 2.1 ABOVE NORMAL
   YEARLY  AVERAGE TEMPERATURE  OF 62.7 WAS 2.0 ABOVE NORMAL

   MAXIMUM TEMP:  99 on July 14th
   MINIMUM TEMP:  16 on January 8th and 10th 

   DAYS WITH TEMPERATURES:
        MAXIMUM >= 90:   47
        MAXIMUM <= 32:    3
        MINIMUM <= 32:   36
        MINIMUM <=  0:    0

   HEATING DEGREE DAYS:  2808.5
   COOLING DEGREE DAYS:  1954.0

   DAYS WITH HEATING DEGREE DAYS: 183
   DAYS WITH COOLING DEGREE DAYS: 178
                               
   PRECIP TOTAL OF 52.04" WAS 1.66" ABOVE NORMAL (103% OF NORMAL).

   GREATEST DAILY RAINFALL:     4.36" on July 15th  
   GREATEST 24-HOUR RAINFALL:   4.47" on July 14th and 15th             
   DAYS WITH MEASUREABLE PRECIP:  124 of 365 or 33.97%

   AVERAGE DAILY PRECIP: 0.14" 
   NORMAL DAILY PRECIP:  0.14"

   DAYS WITH PRECIP >= 0.01"   124
   DAYS WITH PRECIP >= 0.10"    77
   DAYS WITH PRECIP >= 0.50"    28
   DAYS WITH PRECIP >= 1.00"    14

   DAYS WITH THUNDERSTORMS:  31
   NUMBER OF THUNDERSTORMS:  32 
                                  
   DAYS WITH SNOW  (calendar year 2017):    4
   SNOWFALL TOTAL  (calendar year 2017):  6.0" 
   SEASONAL SNOW 2016-2017 (beginning November 2016):  6.0"
   SEASONAL SNOW 2017-2018 (beginning November 2017):  TRACE
    
   CLOUDY DAYS:          76
   PARTLY CLOUDY DAYS:  156 
   SUNNY/CLEAR DAYS:    133
   DAYS WITH F/GF:      110 
   DAYS WITH DENSE FOG:  11
   DAYS WITH FROST:      34
OBSERVATIONS AT 3-HOUR INTERVALS
December 2017: 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| |30.02| 0.00| 51| 49| 92|00| 0| 0| |30.24| 0.00| 38| 35| 90|00| 0| 0| |30.16| 0.00| 49| 47| 91|00| 0| 0| |04| |30.03| 0.00| 51| 49| 93|00| 0| 0| |30.25| 0.00| 35| 33| 92|00| 0| 0| |30.12| 0.00| 48| 46| 91|00| 0| 0| |07| |30.10| 0.00| 48| 46| 96|00| 0| 0| |30.26| 0.00| 34| 33| 93|00| 0| 0| |30.15| 0.00| 50| 49| 96|00| 0| 0| |10| |30.19| 0.00| 55| 45| 68|04| 7| 26| |30.25| 0.00| 50| 46| 85|04| 4| 14| |30.18| 0.00| 55| 51| 86|00| 0| 0| |13| |30.18| 0.00| 56| 43| 63|04| 5| 24| |30.19| 0.00| 58| 47| 69|06| 0| 5| |30.13| 0.00| 59| 50| 72|31| 0| 15| |16| |30.18| 0.00| 54| 43| 67|06| 0| 15| |30.20| 0.00| 55| 48| 77|00| 0| 0| |30.15| 0.00| 58| 49| 73|00| 0| 0| |19| |30.23| 0.00| 50| 42| 74|02| 0| 4| |30.17| 0.00| 52| 47| 83|00| 0| 0| |30.21| 0.00| 53| 47| 79|00| 0| 0| |22| |30.26| 0.00| 42| 38| 86|00| 0| 0| |30.18| 0.00| 52| 48| 87|00| 0| 0| |30.25| 0.00| 45| 42| 89|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 4 | DEC 5 | DEC 6 | | | | | |01| |30.25| 0.00| 41| 39| 92|00| 0| 0| | | | | | | | | | | | | | | | | | | |04| |30.30| 0.00| 38| 36| 93|00| 0| 0| | | | | | | | | | | | | | | | | | | |07| DATALOGGER NOT WORKING | DATALOGGER NOT WORKING | DATALOGGER NOT WORKING |10| | | | | | | | | | | | | | | | | | | | | | | | | | | | |13| | | | | | | | | | | | | | | | | | | |30.06| 0.00| 49| 38| 67|04| 5| 20| |16| | | | | | | | | | | | | | | | | | | |30.06| 0.00| 47| 35| 63|06| 0| 4| |19| | | | | | | | | | | | | | | | | | | |30.07| 0.00| 47| 38| 70|02| 0| 5| |22| | | | | | | | | | | | | | | | | | | |30.08| 0.20| 44| 42| 92|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 7 | DEC 8 | DEC 9 | | | | | |01| |30.06| 0.01| 43| 41| 95|22| 0| 4| |30.07| 0.00| 42| 38| 85|00| 0| 0| |29.90| 0.02| 40| 39| 98|00| 0| 0| |04| |30.08| 0.00| 42| 41| 96|00| 0| 0| |30.05| 0.00| 43| 40| 87|00| 0| 0| |29.85| 0.08| 39| 38| 97|04| 0| 19| |07| |30.10| 0.00| 42| 42| 97|00| 0| 0| |30.09| 0.01| 42| 40| 92|00| 0| 0| |29.84| 0.05| 40| 39| 98|04| 4| 24| |10| |30.13| 0.00| 44| 42| 90|00| 0| 0| |30.10| 0.00| 44| 43| 95|22| 0| 4| |29.77| 0.01| 40| 39| 98|04| 5| 26| |13| |30.07| 0.00| 49| 39| 67|29| 0| 7| |30.05| 0.10| 43| 42| 94|00| 0| 0| |29.74| 0.03| 38| 38| 98|00| 4| 24| |16| |30.05| 0.00| 48| 40| 72|00| 0| 0| |30.02| 0.07| 40| 39| 95|00| 5| 22| |29.73| 0.01| 37| 36| 97|27| 0| 4| |19| |30.08| 0.00| 44| 39| 82|00| 0| 0| |29.99| 0.13| 38| 37| 98|06| 0| 6| |29.80| 0.02| 35| 34| 97|00| 0| 0| |22| |30.09| 0.00| 43| 38| 84|00| 0| 0| |29.94| 0.03| 39| 38| 97|04| 4| 20| |29.86| 0.00| 35| 34| 98|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 10 | DEC 11 | DEC 12 | | | | | |01| |29.90| 0.00| 35| 35| 98|27| 0| 4| |30.10| 0.00| 30| 28| 93|00| 0| 0| |29.88| 0.00| 38| 36| 91|00| 0| 0| |04| |29.94| 0.00| 35| 34| 97|00| 0| 0| |30.06| 0.00| 31| 29| 93|00| 0| 0| |29.79| 0.00| 38| 35| 90|20| 0| 6| |07| |30.03| 0.00| 34| 33| 96|00| 0| 0| |30.10| 0.00| 31| 29| 90|20| 0| 6| |29.69| 0.00| 39| 35| 86|20| 0| 12| |10| |30.11| 0.00| 36| 33| 87|29| 4| 18| |30.11| 0.00| 39| 32| 77|27| 5| 15| |29.63| 0.00| 47| 42| 82|22| 5| 19| |13| |30.09| 0.00| 41| 30| 63|29| 0| 18| |30.04| 0.00| 48| 34| 59|06| 5| 15| |29.54| 0.00| 53| 41| 65|24| 4| 20| |16| |30.08| 0.00| 41| 31| 66|00| 0| 0| |30.01| 0.00| 48| 35| 61|00| 0| 0| |29.53| 0.00| 51| 38| 60|24| 0| 18| |19| |30.13| 0.00| 35| 30| 81|00| 0| 0| |30.00| 0.00| 41| 35| 79|00| 0| 0| |29.55| 0.00| 48| 34| 58|27| 0| 19| |22| |30.14| 0.00| 32| 29| 90|00| 0| 0| |29.96| 0.00| 38| 35| 88|00| 0| 0| |29.66| 0.00| 36| 30| 79|31| 7| 30| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 13 | DEC 14 | DEC 15 | | | | | |01| |29.74| 0.00| 31| 12| 45|29| 4| 33| |29.67| 0.00| 35| 24| 63|00| 0| 0| |30.06| 0.00| 37| 24| 58|02| 0| 4| |04| |29.80| 0.00| 28| 12| 50|27| 0| 17| |29.62| 0.00| 38| 25| 61|20| 0| 12| |30.04| 0.00| 37| 28| 70|04| 0| 15| |07| |29.87| 0.00| 25| 14| 61|00| 0| 0| |29.69| 0.00| 37| 26| 64|18| 0| 23| |30.03| 0.00| 37| 30| 77|02| 0| 17| |10| |29.91| 0.00| 30| 11| 44|27| 4| 24| |29.77| 0.00| 44| 30| 58|24| 0| 6| |29.97| 0.00| 42| 37| 82|04| 0| 11| |13| |29.85| 0.00| 35| 15| 43|27| 4| 25| |29.81| 0.00| 52| 31| 45|27| 4| 24| |29.84| 0.00| 50| 42| 74|00| 0| 0| |16| |29.83| 0.00| 38| 17| 42|24| 0| 15| |29.88| 0.00| 48| 31| 53|06| 0| 16| |29.87| 0.00| 46| 38| 73|27| 4| 20| |19| |29.81| 0.00| 33| 19| 57|00| 0| 0| |30.00| 0.00| 42| 32| 67|06| 0| 17| |29.96| 0.00| 38| 28| 66|29| 0| 21| |22| |29.78| 0.00| 35| 22| 58|18| 0| 4| |30.07| 0.00| 40| 27| 61|04| 0| 13| |30.03| 0.00| 34| 26| 73|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 16 | DEC 17 | DEC 18 | | | | | |01| |30.08| 0.00| 29| 25| 83|00| 0| 0| |30.23| 0.00| 35| 28| 77|00| 0| 0| |30.14| 0.00| 47| 39| 74|22| 0| 6| |04| |30.12| 0.00| 27| 24| 87|00| 0| 0| |30.24| 0.00| 32| 27| 83|00| 0| 0| |30.13| 0.00| 43| 38| 82|20| 0| 7| |07| |30.20| 0.00| 25| 23| 90|00| 0| 0| |30.28| 0.00| 30| 27| 88|00| 0| 0| |30.14| 0.00| 39| 36| 87|00| 0| 0| |10| |30.24| 0.00| 33| 27| 78|00| 0| 0| |30.28| 0.00| 38| 33| 82|20| 0| 7| |30.13| 0.00| 48| 42| 79|24| 5| 14| |13| |30.17| 0.00| 44| 27| 51|00| 0| 0| |30.21| 0.00| 51| 35| 53|00| 0| 0| |30.06| 0.00| 57| 44| 61|29| 5| 15| |16| |30.15| 0.00| 46| 28| 49|20| 0| 12| |30.20| 0.00| 51| 36| 57|22| 0| 11| |30.00| 0.00| 60| 47| 62|20| 4| 14| |19| |30.21| 0.00| 40| 28| 62|00| 0| 0| |30.21| 0.00| 49| 38| 68|22| 0| 5| |30.03| 0.00| 52| 45| 77|00| 0| 0| |22| |30.23| 0.00| 36| 28| 72|00| 0| 0| |30.18| 0.00| 47| 39| 73|22| 0| 5| |30.02| 0.00| 46| 42| 87|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
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 | 0.22 | 0.26 | 0.29 | 0.30 | 0.34 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Date | 08 | 08 | 08 | 08 | 08 | 08 | 08 | 08 | 08 | 08 | 08 | 08 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Time | 1305 | 2210 | 2213 | 2220 | 2230 | 2243 | 2300 | 2316 | 2337 | 2353 | 2348 | 1900 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ 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 2017: 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| |30.00| 0.00| 44| 42| 91|00| 0| 0| |29.87| 0.00| 57| 48| 74|20| 0| 11| |30.01| 0.00| 45| 36| 71|00| 0| 0| |04| |29.99| 0.00| 43| 42| 94|00| 0| 0| |29.87| 0.00| 59| 48| 69|27| 4| 15| |30.03| 0.00| 43| 36| 75|04| 5| 15| |07| |30.00| 0.00| 42| 41| 95|00| 0| 0| |29.90| 0.00| 55| 48| 76|00| 0| 0| |30.12| 0.00| 41| 30| 64|04| 4| 10| |10| |30.04| 0.00| 50| 47| 89|27| 4| 15| |29.96| 0.00| 57| 50| 77|24| 0| 4| |30.20| 0.00| 46| 32| 59|04| 4| 18| |13| |29.96| 0.00| 60| 48| 65|27| 5| 16| |29.95| 0.00| 54| 35| 48|04| 10| 18| |30.19| 0.00| 48| 34| 58|06| 7| 17| |16| |29.93| 0.00| 63| 45| 53|27| 5| 16| |29.95| 0.00| 53| 35| 51|00| 0| 0| |30.19| 0.00| 47| 34| 60|04| 5| 14| |19| |29.96| 0.00| 54| 45| 71|00| 0| 0| |29.99| 0.00| 51| 36| 57|06| 5| 14| |30.23| 0.00| 41| 33| 73|00| 0| 0| |22| |29.91| 0.00| 54| 47| 76|22| 0| 10| |30.01| 0.00| 49| 34| 56|06| 0| 6| |30.26| 0.00| 37| 31| 79|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 22 | DEC 23 | DEC 24 | | | | | |01| |30.23| 0.00| 38| 35| 89|06| 0| 5| |30.08| 0.00| 54| 52| 95|00| 0| 0| |30.01| 0.00| 55| 50| 83|04| 7| 22| |04| |30.21| 0.00| 38| 36| 91|00| 0| 0| |30.06| 0.00| 52| 51| 96|22| 0| 4| |30.08| 0.00| 51| 46| 82|04| 7| 24| |07| |30.21| 0.00| 40| 37| 89|00| 0| 0| |30.03| 0.01| 51| 49| 96|00| 0| 0| |30.12| 0.00| 47| 40| 79|04| 11| 25| |10| |30.24| 0.00| 46| 44| 92|24| 0| 6| |29.97| 0.00| 57| 55| 92|22| 0| 16| |30.16| 0.00| 46| 40| 80|06| 7| 20| |13| |30.16| 0.00| 57| 52| 82|20| 0| 7| |29.91| 0.00| 67| 56| 69|20| 6| 20| |30.06| 0.00| 45| 40| 82|04| 7| 20| |16| |30.13| 0.00| 60| 52| 75|22| 0| 7| |29.85| 0.00| 68| 60| 74|20| 5| 21| |30.00| 0.00| 44| 42| 92|04| 5| 16| |19| |30.15| 0.01| 57| 53| 87|00| 0| 0| |29.84| 0.00| 67| 61| 82|18| 4| 16| |29.95| 0.00| 44| 43| 96|00| 0| 0| |22| |30.13| 0.00| 54| 53| 94|00| 0| 0| |29.91| 0.00| 66| 61| 85|20| 4| 18| |29.90| 0.00| 43| 42| 95|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 25 | DEC 26 | DEC 27 | | | | | |01| |29.84| 0.00| 42| 41| 95|00| 0| 0| |30.34| 0.00| 35| 18| 49|20| 0| 6| |30.42| 0.00| 36| 28| 73|00| 0| 0| |04| |29.86| 0.00| 44| 43| 97|18| 0| 4| |30.41| 0.00| 34| 20| 56|27| 0| 5| |30.42| 0.00| 36| 31| 79|00| 0| 0| |07| |30.00| 0.00| 44| 34| 69|27| 5| 27| |30.47| 0.00| 31| 21| 68|27| 0| 5| |30.42| 0.00| 38| 32| 78|00| 0| 0| |10| |30.13| 0.00| 43| 23| 46|29| 12| 26| |30.50| 0.00| 37| 19| 49|00| 0| 0| |30.42| 0.00| 41| 27| 57|06| 0| 5| |13| |30.14| 0.00| 42| 19| 39|27| 0| 20| |30.44| 0.00| 42| 18| 38|29| 0| 12| |30.36| 0.00| 41| 29| 62|06| 0| 11| |16| |30.20| 0.00| 41| 20| 44|24| 0| 17| |30.43| 0.00| 42| 18| 37|24| 0| 4| |30.39| 0.00| 38| 30| 73|33| 4| 22| |19| |30.30| 0.00| 36| 14| 40|27| 0| 23| |30.46| 0.00| 35| 24| 63|00| 0| 0| |30.45| 0.00| 33| 26| 73|04| 4| 20| |22| |30.36| 0.00| 36| 17| 46|29| 0| 7| |30.45| 0.00| 37| 26| 66|00| 0| 0| |30.48| 0.00| 32| 25| 74|04| 5| 23| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 28 | DEC 29 | DEC 30 | | | | | |01| |30.51| 0.00| 27| 13| 55|31| 4| 24| |30.43| 0.00| 23| 13| 67|00| 0| 0| |30.21| 0.00| 31| 21| 67|00| 0| 0| |04| |30.54| 0.00| 23| 10| 56|31| 0| 19| |30.39| 0.00| 20| 14| 78|00| 0| 0| |30.19| 0.00| 29| 23| 79|00| 0| 0| |07| |30.60| 0.00| 20| 8| 58|31| 0| 19| |30.36| 0.00| 20| 15| 81|00| 0| 0| |30.14| 0.00| 28| 24| 86|00| 0| 0| |10| |30.63| 0.00| 24| 14| 65|33| 0| 20| |30.35| 0.00| 28| 18| 66|00| 0| 0| |30.07| 0.00| 36| 28| 70|22| 0| 4| |13| |30.57| 0.00| 27| 16| 62|33| 0| 22| |30.26| 0.00| 35| 13| 39|22| 0| 15| |29.95| 0.00| 48| 27| 43|22| 0| 20| |16| |30.55| 0.00| 27| 9| 47|31| 0| 16| |30.24| 0.00| 37| 16| 42|00| 0| 0| |29.93| 0.00| 46| 27| 48|22| 0| 15| |19| |30.53| 0.00| 26| 9| 48|04| 0| 4| |30.26| 0.00| 34| 20| 57|00| 0| 0| |30.00| 0.00| 40| 27| 60|00| 0| 0| |22| |30.49| 0.00| 24| 11| 58|00| 0| 0| |30.27| 0.00| 31| 21| 66|00| 0| 0| |30.07| 0.00| 37| 28| 71|33| 0| 17| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | DEC 31 | | | | | | | |01| |30.14| 0.00| 32| 22| 67|33| 4| 23| | | |04| |30.23| 0.00| 27| 12| 51|31| 4| 24| | | |07| |30.28| 0.00| 25| 7| 46|31| 0| 19| | | |10| |30.33| 0.00| 26| 9| 49|33| 0| 23| | | |13| |30.30| 0.00| 28| 7| 40|33| 0| 22| | | |16| |30.29| 0.00| 27| 6| 39|04| 0| 15| | | |19| |30.32| 0.00| 25| 6| 43|31| 0| 19| | | |22| |30.35| 0.00| 24| 8| 50|33| 4| 24| | | +--+----+-----+-----+---+---+---+--+---+---+---------------------------------------+---------------------------------------+
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| |30.090| 39| 33| 79| 0.7| 35 | 0.5| |04| |30.092| 38| 33| 82| 0.7| 01 | 0.4| |07| |30.116| 37| 32| 82| 0.9| 03 | 0.6| |10| |30.134| 42| 34| 74| 2.4| 32 | 0.8| |13| |30.077| 47| 34| 61| 2.4| 02 | 0.8| |16| |30.070| 47| 34| 62| 1.3| 32 | 0.4| |19| |30.099| 43| 33| 71| 0.4| 08 | 0.3| |22| |30.115| 40| 33| 77| 0.8| 35 | 0.4| +--+----+------+---+---+---+-----+----+----+
HOURLY PRECIPITATION (Water Equivalent)
December 2017: 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| | | | | | | | | | | | | | | | | | | | | | | | |01 02| | | | | | | | | | | | | | | | | | | | | | | | |02 03| | | | | | | | | | | | | | | | | | | | | | | | |03 04| | | | | | | | | | | | | | | | | | | | | | | | |04 05| | | | | | | | | | | | | | | | | | | | | | | | |05 | | | | | | | | | | | | | | | | | | | | | TOTAL FOR DAY 0.01| 06| | | | | | | | | | | | | | | | | | | |0.05| |0.20|0.10| |06 07|0.01|0.01| | | | | | | | | | | | | | | | | | | | | | |07 08| | | | | | |0.01|0.01|0.01| | |0.05|0.10|0.12|0.07|0.07|0.11|0.09|0.13|0.11|0.05|0.03|0.18|0.11|08 09|0.02|0.08|0.06|0.08|0.03|0.05|0.05|0.02|0.03|0.01|0.04|0.02|0.03|0.01|0.01|0.01|0.02|0.02|0.02|0.01| | | | |09 10| | | | | | | | | | | | | | | | | | | | | | | | |10 | | | | | | | | | | | | | | | | | | | | | | | | | 11| | | | | | | | | | | | | | | | | | | | | | | | |11 12| | | | | | | | | | | | | | | | | | | | |0.01| | | |12 13| | | | | | | | | | | | | | | | | | | | | | | | |13 14| | | | | | | | | | | | | | | | | | | | | | | | |14 15| | | | | | | | | | | | | | | | | | | | | | | | |15 | | | | | | | | | | | | | | | | | | | | | | | | | 16| | | | | | | | | | | | | | | | | | | | | | | | |16 17| | | | | | | | | | | | | | | | | | | | | | | | |17 18| | | | | | | | | | | | | | | | | | | | | | | | |18 19| | | | | | | | | | | | | | | | | | | | | | | | |19 20| | | | | | | | | | | | | | | | | | | | | | | | |20 | | | | | | | | | | | | | | | | | | | | | | | | | 21| | | | | | | | | | | | | | | | | | | | | | | | |21 22| | | | | | | | | | | | | | | | | | |0.01| | | | | |22 23| | | | | | |0.01| | | | | | | | | | | | | | | | |0.05|23 24| | | | | | | | | | | | | | | | | |0.01| | | | | | |24 25| | | | | | | | | | | | | | | | | | | | | | | | |25 | | | | | | | | | | | | | | | | | | | | | | | | | 26| | | | | | | | | | | | | | | | | | | | | | | | |26 27| | | | | | | | | | | | | | | | | | | | | | | | |27 28| | | | | | | | | | | | | | | | | | | | | | | | |28 29| | | | | | | | | | | | | | | | | | | | | | | | |29 30| | | | | | | | | | | | | | | | | | | | | | | | |30 31| | | | | | | | | | | | | | | | | | | | | | | | |31 ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- Sum|0.03|0.09|0.06|0.08|0.03|0.05|0.07|0.03|0.04|0.01|0.04|0.07|0.13|0.13|0.08|0.08|0.13|0.12|0.16|0.18|0.06|0.23|0.28|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.)