September 1998
Graphs follow the text summary!
SAT, OCT 3, 1998 10:00 AM EDT
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MONTHLY SUMMARY OF CLIMATOLOGICAL DATA - PORTSMOUTH, VIRGINIA
Portsmouth Weather Records Service
Portsmouth, Virginia 23702-2017
(3 miles south / West Cradock Section)
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Monthly summary of Local Climatological Data for Portsmouth,
Virginia, West Cradock Section, during the month of September 1998.
Time is EDT.
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D HT DN LT DN MT DN HDD CDD PREC WD WS WAS SC WXR TYPE/REMARKS
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1 87 +2 74 +6 80.5 +4 15.5 T ENE13 PC +FG HZ -TSRA
2 87 +2 70 +2 78.5 +2 13.5 WSW23 PC BR HZ WARM HUMID
3 85 0 70 +0 77.5 +0 12.5 0.66 WSW19 PC SHRA BR RA
4 80 -3 70 +2 75.0 -1 10.0 0.82 N 28 PC RA BR SHRA HUMID
5 84 +1 65 -2 74.5 -1 9.5 N 20 SU FROPA(AM)DRIER
6 90 +5 66 -1 78.0 +2 13.0 SW 19 SU BR HZ
7 93 +8 73 +6 83.0 +7 18.0 SW 25 SU HZ HOT
8 81 -1 67 0 74.0 0 9.0 0.43 SSW24 PC FROPA BR TSRA
9 72 -12 57 -8 64.5 -10 0.5 N 23 SU COOLER PLEASANT
10 76 -8 56 -10 66.0 -9 1.0 N 20 SU COOL DRY
11 80 -3 56 -9 68.0 -6 3.0 N 16 SU PLEASANT
12 89 +5 62 -2 75.5 +2 10.5 W 13 SU WARMER
13 88 +5 65 +1 76.5 +3 11.5 N 15 SU -BR
14 88 +6 72 +7 80.0 +6 15.0 SSW10 SU +FG WARM
15 89 +7 71 +6 80.0 +7 15.0 SW 12 SU GF WARM
16 89 +7 71 +6 80.0 +6 15.0 SW 16 PC GF HZ WARM
17 89 +7 71 +6 80.0 +7 15.0 T NE 12 PC +FG SHRA
18 83 +1 75 +10 79.0 +6 14.0 NE 16 PC -BR
19 82 0 74 +10 78.0 +5 13.0 0.01 NE 18 PC -BR(AM) -SHRA
20 82 +1 71 +8 76.5 +5 11.5 N 15 PC -BR
21 88 +7 69 +6 78.5 +7 13.5 SW 16 PC BR
22 86 +7 74 +10 80.5 +8 15.5 0.06 N 27 PC SHRA FROPA(EVE)
23 74 -3 57 -2 65.5 -2 0.5 NNE25 PC COOLER BREEZY
24 76 0 51 -8 63.5 -4 1.5 W 15 SU PLEASANT
25 82 +4 58 -4 69.5 0 4.5 SW 15 PC
26 87 +7 65 +2 76.0 +5 11.0 SW 13 SU
27 90 +12 67 +6 78.5 +9 13.5 SW 22 SU WARM
28 91 +14 70 +11 80.5 +12 15.5 T SSW14 PC -TSRA HZ BR DST LTG
29 81 +6 71 +13 76.0 +9 11.0 NNE12 PC
30 84 +9 68 +9 76.0 +9 11.0 0.18 SSW18 PC SHRA BR
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SUMMARY OF SEPTEMBER 1998:
TEMPERATURE:
Monthly mean: High = 84.4 Low= 66.8 Mean = 75.6
Departure < Normal: High = +3.2 Low = +2.7 Mean = +3.0
Degree Days: Heating = 2.0 Cooling = 321.0
Number of Days Using: Heating = 2 Cooling = 28
Days with maximum temperature >= 90: 4
Days with maximum temperature <= 32: 0
Days with minimum temperature <= 32: 0
Days with minimum temperature <= 0: 0
PRECIPITATION:
Total month = 2.16" Departure from Normal = -1.72"
Normal month (to date) = 3.88" or 56%
Average daily = 0.07"
Normal daily = 0.13"
Number of days with measurable precipitation = 6
Year-to-date = 40.83" Departure = + 3.87" or 110% of normal
Maximum for September = 10.29" in 1979 --> (Since
Minimum for September = 0.26" in 1978 --> (1976)
Number of days with 0.01" or more: 6 Snowfall
Number of days with 0.10" or more: 4 September total = 0.00"
Number of days with 0.50" or more: 2 September max = 0.00" in
Number of days with 1.00" or more: 0 ----
DAILY EXTREMES: Low temperature = 51 on the 24th
High temperature = 93 on the 7th
Maximum daily precipitation = 0.82" on the 4th
Maximum 24-hour rainfall = 1.48" on the 3rd-4th
Maximum barometric pressure = 30.210" on the 24th
Minimum barometric pressure = 29.555" on the 8th
WIND:
Maximum wind gust = N 28 MPH on the 4th
NUMBER OF:
Days Cloudy: 0 Days with thunderstorms: 3
Days Partly Cloudy: 17 # of Thunderstorms: 3
Days Clear/Sunny: 13 Days with some type of snowfall: 0
Days with Fog/Ground Fog: 13
Days with Dense Fog: 3
Days with Frost: 0
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YEAR-TO-DATE: (through September 30th, 1998)
Temperatures Degree Days Precipitation
Mean maximum: 74.1 (+1.9) Heating: Aqueous: 40.83" (DEP +3.87") 110%
Mean minimum: 57.0 (+3.5) 1730.0 Maximum monthly: 7.60"/FEB.
Mean monthly: 65.5 (+2.7) Cooling: Minimum monthly: 2.16"/SEP.
1878.0
Highest: 99, July 22
Snowfall: 0.00"
Lowest: 24, January 1 Maximum daily: 0.00"
Days with max temperature >= 90: 41 Maximum monthly: 0.00"
Days with max temperature <= 32: 0
Days with min temperature <= 32: 13 Days with some type of
Days with temperature <= 0: 0 snowfall: 2
Days with measurable
Number of: precipitation: 91 or 33.33%
Days using Heating: 114
Days using Cooling: 158 Days with thunderstorms: 26
Days Cloudy: 43 Number of thunderstorms: 29
Days Partly Cloudy: 167
Days Clear/Sunny: 63 Greatest 24-hour period
Days with fog/ground fog: 119 rainfall: 3.86"/FEB. 4th
Wind (Highest Gust): NNE 63 miles per hour, August 27th
Barometer: Highest 30.667" on January 1st
Lowest: 29.198" on February 4th
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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
FC+ Tornado/waterspout
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
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
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PWRS DENOTATIONS: SU/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; AFT afternoon hours;
EVE evening hours; PM evening hours; E estimated;
VBL, variable wind directions; TS, tropical storm
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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 WAS Average Wind Speed & Dominant
Direction
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
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NOTES: All temperatures are in degrees fahrenheit. All precipita-
tion measurements are in inches. All wind speeds are in miles per
hour.
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