SAT FEB 1, 1997 9:15 AM EST ------------------------------------------------------------------- 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 1997. Time is EST. ------------------------------------------------------------------- D HT DN LT DN MT DN HDD PREC WD WS SC WXR TYPE/REMARKS ------------------------------------------------------------------- 1 43 -9 39 +2 41.0 -4 24.0 NE 26 C BR BREEZY (AM) DAMP 2 56 +6 41 +7 48.5 +7 16.5 SW 19 PC BR MILD 3 69 +20 49 +16 59.0 +18 6.0 W 21 PC BR MILD -HZ 4 71 +23 50 +17 60.5 +20 4.5 SSW18 SU FG (AM) -HZ 5 71 +24 53 +21 62.0 +23 3.0 T SW 31 PC BR FROPA -SHRA MILD 6 61 +12 48 +17 54.5 +14 10.5 W 24 SU COOLER 7 48 -3 37 +3 42.5 0 22.5 NNW16 PC COLDER 8 42 -3 30 -1 36.0 -2 29.0 NNW20 PC COLD 9 45 -1 35 +7 40.0 +3 25.0 .87 E 24 C -SHSN PE -RA BR 10 46 +1 38 +8 42.0 +5 23.0 W 37 PC FROPA 11 44 0 27 -1 35.5 0 29.5 .02 SW 38 PC FROPA SHRA SHSN 0.10" SNOW ACCUMULATION 12 37 -10 23 -7 30.0 -8 35.0 W 17 SU COLD 13 34 -12 24 -7 29.0 -10 36.0 W 17 SU COLD FROPA 14 39 -10 23 -7 31.0 -8 34.0 NW 16 SU -FROST COLD 15 45 -1 23 -8 34.0 -5 31.0 NW 16 SU FROST (AM) 16 57 +11 33 +5 45.0 +8 20.0 .91 SSE34 PC +SHRA BR FROPA 17 33 -15 18 -10 25.5 -12 39.5 WNW33 CL VERY COLD DRY 18 26 -23 16 -14 21.0 -16 44.0 WNW30 CL VERY COLD DRY 19 29 -15 13 -17 20.5 -16 44.5 NNW26 SU VERY COLD DRY 20 44 -3 23 -5 33.5 -4 31.5 WSW25 -PC MILDER 21 41 -4 29 0 35.0 -2 30.0 NNE23 SU -FROST FROPA 22 65 +18 29 0 47.0 +9 18.0 .07 S 33 PC WARMER -SHRA -FROST 23 63 +13 41 +11 52.0 +12 13.0 .01 NNW29 PC -SHRA -BR FROPA 24 58 +5 38 +6 48.0 +5 17.0 .02 SSE28 PC -BR SHRA 25 62 +11 43 +10 52.5 +11 12.5 .19 WNW28 PC SHRA TSRA FROPA 26 43 -5 34 +5 38.5 0 26.5 W 21 PC COLDER 27 49 +1 34 +3 41.5 +2 23.5 ESE21 PC CHILLY 28 60 +12 37 +6 48.5 +9 16.5 .45 S 26 PC RA +SHRA BR FROPA 29 37 -11 32 +3 34.5 -4 30.5 N 21 PC COLDER 30 41 -8 31 +3 36.0 -4 29.0 N 17 C FROPA 31 50 +1 38 +5 44.0 +3 21.0 .01 NNW19 C -RA BR ------------------------------------------------------------------- SUMMARY OF JANUARY 1997: TEMPERATURE: Monthly mean: High = 48.7 Low = 33.2 Mean = 40.9 Departure < Normal: High = + 0.9 Low = + 2.4 Mean = + 1.6 Degree Days: Heating = 746.0 Cooling = 0.0 Number of Days Using: Heating = 31 Cooling = 0 Days with maximum temperature >= 90: 0 Days with maximum temperature <= 32: 2 Days with minimum temperature <= 32: 14 Days with minimum temperature <= 0: 0 PRECIPITATION: Total month = 2.55" Departure < Normal = - 1.52" Normal month (to date) 4.07" or 63% Average daily = 0.08" Normal daily = 0.13" Number of days with measurable precipitation = 9 Year-to-date = 2.55" Departure = - 1.52" or 63% of normal Maximum for January = 11.12" in 1987 --> (Since Minimum for January = 1.07" in 1981 --> 1976) Number of days with 0.01" or more: 9 Snowfall Number of days with 0.10" or more: 4 January total = 0.10" Number of days with 0.50" or more: 2 January max = 8.90" Number of days with 1.00" or more: 0 in 1980 DAILY EXTREMES: Low temperature = 13 on the 19th High temperature = 71 on the 4th and 5th Maximum daily precipitation = 0.91" on the 16th Maximum 24-hour rainfall = 0.91" on the 16th Maximum wind gust = SW 38 mph on the 11th Maximum barometric pressure = 30.592 on the 27th Minimum barometric pressure = 29.466" on the 8th NUMBER OF: Days Cloudy: 4 Days with thunderstorms: 1 Days Partly Cloudy: 18 # of Thunderstorms: 1 Days Clear/Sunny: 9 Days with some type of snowfall: 2 Days with Fog/Ground Fog:11 Days with Dense Fog: 2 Days with Frost: 4 ------------------------------------------------------------------ YEAR-TO-DATE: Temperatures Degree Days Precipitation Mean maximum: 48.7 (+0.9) Heating: Aqueous: 2.55" (DEP - 1.52") Mean minimum: 33.2 (+2.4) 746.0 Maximum monthly: 2.55"/JAN. Mean monthly: 40.9 (+1.6) Cooling: Minimum monthly: 2.55"/JAN. 0.0 Highest: 71, January 4,5 Snowfall: 0.10" Lowest: 13, January 19 Maximum daily: 0.10"/JAN.11 Days with max temperature >= 90: 0 Maximum monthly: 0.10"/JAN. Days with max temperature <= 32: 2 Seasonal total: 0.10" Days with min temperature <= 32: 14 Days with some type of Days with temperature <= 0: 0 snowfall: 1 Days with measurable Number of: precipitation: 9 or 29% Days using Heating: 746 Days using Cooling: 0 Days with thunderstorms: 1 Days Cloudy: 4 Number of thunderstorms: 1 Days Partly Cloudy: 18 Days Clear/Sunny: 9 Greatest 24-hour period Days with fog/ground fog: 11 rainfall: 0.91"/JAN. 16th Wind (Highest Gust): SW 38 miles per hour, January 11th Barometer: Highest 30.592" on January 27th Lowest: 29.466" on January 8th ------------------------------------------------------------------ METAR DENOTATIONS: BC Patches BL Blowing BR Fog with visibilites > 5/8 but <=6 statute miles and below to 5/8 mile DU Dust (widespread) DS Duststorm DZ Drizzle FC Funnel Cloud FG Fog with visibility <= 5/8 statute miles FU Smoke FZDZ Freezing drizzle FZRA Freezing rain FZFG Freezing fog GR Hail GS Small hail HZ Haze IC Ice crystals PE Ice pellets PY Spray RA Rain SA Sand SS Sandstorm PO Sand or dust whirls SG Snow granules SH Shower SHRA Shower of rain SHSN Shower of snow SHPE Shower of ice pellets SHGR Shower with hail SHGS Shower with small hail SM Statute miles SN Snow SQ Squalls TC+ Tornado/waterspout TS Thunderstorm TSGR Thunderstorm with hail TSGS Thunderstorm with small hail TSPE Thunderstorm with ice pellets TSRA Thunderstorm with rain TSSN Thunderstorm with snow UP Unknown precipitation VA Volcanic ash VC Vicinity VV Used for obscurred sky METAR Qualifiers: (now placed in FRONT of code) - Light + Heavy DR Low drifting M Below (as in -x.x degrees) MI Shallow PR Partial ------------------------------------------------------------------ PWRS DENOTATIONS: CL = Clear sky; PC = Partly cloudy sky; C = cloudy sky; NA, not available; NR, not recorded; TEMP, temperature; MAX, maximum; MIN, minimum; T, trace of precipitation; INOP, inoperative 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 hours; AFT 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 LB Low Barometer Reading (Inches) SC Dominant Daily Sky Cover HDD Heating Degree Days WXR TYPES Observed Weather CDD Cooling Degree Days Conditions and Remarks ------------------------------------------------------------------ NOTES: All temperatures are in degrees fahrenheit. All precipita- tion measurements are in inches. All wind speeds are in miles per hour. ------------------------------------------------------------------