MONTHLY SUMMARY OF CLIMATOLOGICAL DATA - PORTSMOUTH, VIRGINIA Portsmouth Weather Records Service Portsmouth, Virginia 23702-2017 (3 miles south/West Cradock Section) 1:00 AM EST, Sunday, January 1, 1995 ----------------------------------------------------------------------------- Monthly summary of Local Climatological Data for Portsmouth, Virginia, West Cradock Section, during the month of December, 1994. Time is EST. ----------------------------------------------------------------------------- D HT DN LT DN MT DN HDD CDD PREC HB LB WD WS SC WXR TYPE/REMARKS ----------------------------------------------------------------------------- 1 51 -6 34 -6 42.5 -6 22.5 050 032 NE 18 SU FR- CHILLY 2 60 1 32 -7 46.0 -3 19.0 046 033 SW 13 SU FR (AM) F- (AM) 3 71 15 41 2 56.0 8 9.0 040 030 SW 14 -PC PLEASANT 4 72 15 59 21 65.5 18 0.5 T 038 020 S 11 C RW- (PM) 5 72 17 63 25 67.5 21 2.5 .66 020 996 SW 19 PC RW- T F FROPA 6 71 12 56 20 63.5 16 1.5 019 007 W 13 PC H- 7 77 22 54 17 65.5 20 0.5 013 989 SW 21 PC F (AM) H- WARM 8 65 9 37 1 51.0 5 14.0 050 003 N 31 PC FROPA COLDER 9 61 5 33 -3 47.0 1 18.0 048 022 NNE 10 PC FR- (AM) 10 59 3 53 17 56.0 10 9.0 .05 022 978 N 14 C RW F+ L- 11 63 12 37 1 50.0 7 15.0 .15 033 971 N 29 PC F+RW FROP BREEZY 12 41 -10 34 -2 37.5 -6 27.5 051 031 N 28 PC COLD BREEZY 13 49 -5 41 4 45.0 -1 20.0 .12 041 030 N 22 C R- F BREEZY 14 56 4 46 12 51.0 8 14.0 T 035 027 NE 24 C BREEZY R-- 15 48 -7 42 6 45.0 0 20.0 T 045 033 N 26 C F L- BREEZY COLD 16 50 -2 43 7 46.5 3 18.5 049 029 NNE 19 PC 17 56 5 45 11 50.5 8 14.5 .07 029 003 W 12 C RW F DAMP 18 51 0 43 10 47.0 5 18.0 .16 006 990 WNW 21 PC R- F FROPA K RW 19 50 0 33 0 41.5 0 23.5 038 006 N 22 PC CHILLY 20 51 1 29 -5 40.0 -2 25.0 051 037 NE 11 PC FR COOL 21 55 4 31 -4 43.0 0 22.2 054 039 NE 13 SU FR CHILLY 22 58 8 45 12 51.5 10 13.5 .07 039 984 NNE 20 C F RW R- BREEZY 23 56 1 50 14 53.0 7 12.0 .01 984 958 NNE 32 PC WINDY RW-F COOL 24 52 -3 45 10 48.5 3 16.5 .02 962 945 N 29 C WINDY R- L F 25 52 1 45 13 48.5 7 16.5 T 002 962 N 19 C BREEZY L- 26 50 3 39 8 44.5 6 20.5 025 002 N 22 SU COOL 27 53 7 38 5 45.5 6 19.5 030 015 N 16 SU CHILLY 28 63 10 33 -3 48.0 3 17.0 015 995 W 18 SU FR- PLEASANT 29 51 0 42 7 46.5 4 18.5 038 000 N 21 -PC FROPA 30 45 -3 33 0 39.0 -1 26.0 056 037 NNE 24 PC VIRGA COLD 31 62 11 32 -1 47.0 5 18.0 .15 049 011 SE 14 PC FR-(AM) R- F L- ----------------------------------------------------------------------------- SUMMARY OF DECEMBER 1994: TEMPERATURE: Monthly mean: High = 57.1 Low = 41.5 Mean = 49.3 Departure < Normal: High = +4.1 Low = +6.2 Mean = +5.2 Degree Days: Heating = 489.0 Cooling = 3.5 Number of Days Using: Heating = 28 Cooling = 3 Days with maximum temperature >= 90: 00 Days with minimum temperature <= 32: 04 Days with minimum temperature <= 0: 00 PRECIPITATION: Total month = 1.46" Normal month = 2.96" Departure < Normal = -1.50" or 49% Normal Average daily = 0.05" Normal daily = 0.10" Number of days with measurable precipitation = 10 Maximum for December = 5.73" in 1983 --> (Since Minimum for December = 0.76" in 1988 --> 1976) Number of days with 0.01" or more: 10 Snowfall Number of days with 0.10" or more: 5 December total = 0.00" Number of days with 0.50" or more: 1 December maximum = 1.70" in Number of days with 1.00" or more: 0 1993 DAILY EXTREMES: Low temperature = 29 on the 20th High temperature = 77 on the 7th Maximum daily precipitation = 0.66" on the 5th Maximum 24-hour rainfall = 0.66" on the 5th Maximum wind gust = 32 mph from the NNE on the 23rd High barometer = 30.56" on the 30th Low barometer = 29.45" on the 24th Number of Days with thundershowers/ Days Cloudy: 9 storms: 1 Days Partly Cloudy: 16 Number of thundershowers/ Days Clear/Sunny: 6 storms: 1 Days with Fog/Ground fog: 12 Days with some type of snowfall: 0 --------------------------------------------------------------------------- YEARLY-TOTALS-TO-DATE Temperatures Degree Days Precipitation Mean maximum: 71.0 (+1.4) Heating: 3050.0 Aqueous: 46.16" (-0.70") Mean minimum: 51.7 (+0.8) Cooling: 1718.0 Maximum monthly: 10.96"/MAR. Mean monthly: 61.4 (+1.2) Minimum monthly: 1.23"/APR. Highest: 99, July 15th Snowfall: 8.00" Lowest: 5, January 19th Maximum daily: 2.00"/JAN.14 Days with maximum temperature >= 90: 48 Maximum monthly: 6.90"/JAN. Days with minimum temperature <= 32: 46 Days with some type of Days with temperature <= 0: 00 snowfall: 15 Days with measurable precipitation: 124 or 34% Number of Days with thundershowers/ Days Cloudy: 45 storms: 34 Days Partly Cloudy: 244 Number of thundershowers/ Days Clear/Sunny: 76 storms: 38 Days with fog/ground fog: 119 Greatest 24-hour period rainfall: 3.69"/March 1-2 Wind (Highest Recorded Wind Gust): Southwest 50 miles per hour, January 4th West 50 miles per hour, March 18th Barometer: Highest 30.80" on January 10th; Lowest: 29.12" on March 2nd ---------------------------------------------------------------------------- DENOTATIONS (Weather/sky conditions) Intensity Markings A Hail GF Ground fog RW Rainshower Precipitation: AP Small hail GL Glaze S Snow - Light B Blowing H Haze SG Snow granules + Heavy C Cloudy IP Ice pellets SP Snow pellets Sky Condition: CL Clear K Smoke SU Sunny -Thin or Partial D Dust L Drizzle TRW Thundershower Departures from F Fog LTG Lightning T Thunderstorm Norms: FR Frost PC Partly Cloudy X Obscurred Sky - below; + above R Rain Y Spray ZL Freezing drizzle ZR Freezing rain ----------------------------------------------------------------------------- OTHER DENOTATIONS: NA, not available; NR, not recorded; TEMP, temperature; MAX, maximum; MIN, minimum; T, trace of precipitation; INOP, inopera- tive equipment; MPH, miles per hour; DN, departure from normal; YR, year; NORM, normal; DSNT LTG, distant lightning; FROP or FROPA, frontal passage; AM morning; PM afternoon hours; EVE evening hours; E estimated; VBL, variable wind directions ----------------------------------------------------------------------------- COLUMN DENOTATIONS: D Date PREC Precipitation HT High Temperature WS Maximum Wind Speed (Gust) LT Low Temperature WD Direction of Maximum Wind Gust MT Mean Temperature HB High Barometer Reading (Inches) DN Departure from Normal of High, LB Low Barometer Reading (Inches) Low or Mean Temperature SC Dominant Daily Sky Cover HDD Heating Degree Days WXR TYPES Observed Weather Conditions CDD Cooling Degree Days and Remarks ----------------------------------------------------------------------------- NOTES: All temperatures are in degrees fahrenheit. All precipitation mea- surements are in inches. All wind speeds are in miles per hour. -----------------------------------------------------------------------------