----------------------------------------------------------------------------- MONTHLY SUMMARY OF CLIMATOLOGICAL DATA - PORTSMOUTH, VIRGINIA Portsmouth Weather Records Service Portsmouth, Virginia 23702-2017 (3 miles south / West Cradock Section) ----------------------------------------------------------------------------- Monthly summary of Local Climatological Data for Portsmouth, Virginia, West Cradock Section, during the month of January 1996. Time is EST. ----------------------------------------------------------------------------- D HT DN LT DN MT DN HDD CDD PREC WD WS SC WXR TYPE/REMARKS ----------------------------------------------------------------------------- 1 45 -7 42 +5 43.5 -1 21.5 0.07 NE 15 C F+ L R- DAMP 2 47 -2 42 +8 44.5 +3 20.5 0.25 NNW14 C F+ L TRW (PM) 3 56 +8 32 0 44.0 +4 21.0 0.05 N 28 PC F+ RW (AM) RW FROPA (PM) ACCUMULATION: TRACE 4 37 -10 28 -4 32.5 -7 32.5 T NW 27 PC SW(AM) COLD FR(PM) ACCUMULATION: TRACE 5 40 -5 29 -2 34.5 -4 30.5 T NW 22 PC SW--(AM) COLD ACCUMULATION: NONE 6 31 -18 26 -4 28.5 -11 36.5 0.45 NNE24 C S COLD ACCUMULATION 4.5" 7 41 -10 22 -12 32.0 -11 33.5 1.24 NNE31 C S IP ZR R F ZL-FROPA SW- ACCUMULATION: 1.0" 8 30 -15 22 -9 26.0 -12 39.0 0.10 NW 35 PC ZL- S SW WINDY ACCUMULATION: 2.0" 9 39 -7 18 -10 28.5 -8 36.5 WSW24 PC 10 40 -5 25 -4 32.5 -5 32.5 NNW26 PC FROPA COLD 11 29 -15 21 -7 25.0 -11 40.0 N 24 PC COLD 12 43 -4 28 -2 35.5 -3 29.5 1.13 WNW23 C S IP R F FROPA S-- ACCUMULATION: TRACE 13 42 -5 26 -5 34.0 -5 31.0 WNW22 SU FROST+(AM) 14 52 +3 28 -2 40.0 0 25.0 WSW18 SU FR+(AM) MILDER 15 55 +8 37 +6 46.0 +7 19.0 NE 23 SU FROPA 16 44 -2 33 +5 38.5 +2 26.5 .01 NNE18 PC RW-F- 17 62 +13 39 +11 50.5 +12 14.5 S 17 PC F+(AM) 18 69 +19 44 +12 56.5 +15 8.5 .02 SE 40 PC F(AM) RW- WINDY PM 19 70 +25 31 +1 50.5 +13 14.5 .55 SSE64 PC RW TRW FROPA 20 31 -16 22 -6 26.5 -11 38.5 NNW24 PC COLD 21 36 -9 29 0 32.5 -5 32.5 .02 N 19 C R-S-F FROPA 22 38 -8 29 0 33.5 -4 31.5 NNE16 PC F 23 52 +3 29 -1 40.5 +1 24.5 SW 19 PC F+(AM) 24 67 +14 41 +9 54.0 +12 11.0 .52 SSW60 PC WINDY RW+ FROPA 25 41 -9 30 -2 35.5 -6 29.5 W 23 SU BREEZY COLDER 26 57 +8 25 -4 41.0 +2 24.0 ESE24 PC FR(AM) 27 64 +16 40 +10 52.0 +13 13.0 .77 ESE47 C R F WINDY 28 43 -4 31 +1 37.0 -2 28.0 SW 29 PC FR- (PM) 29 44 -4 32 +3 38.0 -1 27.0 .22 ENE18 C FR- (AM) R F 30 49 0 37 +6 43.0 +3 22.0 .01 ESE15 PC RW- F 31 47 -2 30 -2 38.5 -2 26.5 .12 NE 28 C R F FROPA ----------------------------------------------------------------------------- SUMMARY OF JANUARY 1996: TEMPERATURE: Monthly mean: High = 46.5 Low = 30.6 Mean = 38.5 Departure < Normal: High = -1.3 Low = 0.1 Mean = -0.7 Degree Days: Heating = 820.5 Cooling = 0.0 Number of Days Using: Heating = 31 Cooling = 0 Days with maximum temperature >= 90: 0 Days with maximum temperature <= 32: 4 Days with minimum temperature <= 32: 22 Days with minimum temperature <= 0: 0 PRECIPITATION: Total month = 5.60" Departure < Normal = +1.45" Normal month = 4.15" or 135% Average daily = 0.18" Normal daily = 0.13" Number of days with measurable precipitation = 16 Year-to-date = 5.60" Departure = +1.45" 135% of normal Maximum for January = 11.12" in 1987 --> (Since Minimum for December = 1.07" in 1981 --> 1977) Number of days with 0.01" or more: 16 Snowfall Number of days with 0.10" or more: 10 January total = 7.50" Number of days with 0.50" or more: 5 January maximum = 8.90" Number of days with 1.00" or more: 2 in 1980 DAILY EXTREMES: Low temperature = 18 on the 9th High temperature = 70 on the 19th Maximum daily precipitation = 1.24" on the 7th Maximum 24-hour rainfall = 1.69" on the 6th-7th Maximum wind gust = SSE 64 mph on the 19th Maximum barometric pressure = 30.65" on the 26th Minimum barometric pressure = 29.38" on the 7th NUMBER OF: Days Cloudy: 10 Days with thunderstorms: 2 Days Partly Cloudy: 17 Thunderstorms: 2 Days Clear/Sunny: 4 Days with some type of snowfall: 8 Days with Fog/Ground fog: 15 ---------------------------------------------------------------------------- YEAR-TO-DATE: Temperatures Degree Days Precipitation Mean maximum: 46.5 (-1.3) Heating: 820.5 Aqueous: 5.60" (DEP +1.45") Mean minimum: 30.6 (-0.1) Cooling: 0.0 Maximum monthly: 5.60"/JAN. Mean monthly: 38.5 (-0.7) Minimum monthly: 5.60"/JAN. Highest: 70, January 19th Snowfall: 7.50" Lowest: 18, January 9th Maximum daily: 4.50"/JAN. 6 Days with maximum temperature >= 90: 0 Maximum monthly: 7.50"/JAN. Days with maximum temperature <= 32: 22 Days with minimum temperature <= 32: 4 Days with some type of Days with temperature <= 0: 0 snowfall: 8 Days with measurable Number of: precipitation: 16 or 50% Days using Heating: 31 Days using Cooling: 0 Days with thunderstorms: 2 Days Cloudy: 10 Number of thunderstorms: 2 Days Partly Cloudy: 17 Days Clear/Sunny: 4 Greatest 24-hour period Days with fog/ground fog: 15 rainfall: 1.69"/Jan. 6-7th Wind (Highest Recorded Wind Gust): SSW 64 miles per hour, JAN. 19 Barometer: Highest 30.65" on January 26th; Lowest: 29.38" on January 7th --------------------------------------------------------------------------- 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; DEP, departure; YR, year; NORM, normal; DST 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 measurements are in inches. All wind speeds are in miles per hour. -----------------------------------------------------------------------------