January & Yearly 1999
Graphs follow the text summary!
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FRI, FEB 12, 1999 9:15 PM EST
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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 January 1999.
Time is EST.
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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 39 -12 25 -11 32.0 -12 33.0 N 19 N4.6 SU FROST COLD
2 57 +7 28 -6 42.5 +1 22.5 SE 24 NNE7.0 C WARMFROPA
3 65 +14 43 9 54.0 +12 11.0 .36 S 40 W6.8 PC WINDY SHRA FROPA
4 43 -6 29 -5 36.0 -5 29.0 W 20 WNW5.5 SU BREEZY COLD
5*29 -18 21 -11 25.0 -14 40.0 N 20 N4.8 SU COLD NEW STATION
MINIMUM HIGH RECORD TEMP
6 38 -12 17 -15 27.5 -13 37.5 SSW22 SSW6.5 SU FROST FU
7 53 +1 34 -1 43.5 0 21.5 W23 NE7.8 PC FROPA
8 54 +7 38 +5 46.0 +6 19.0 T SE14 NE4.3 C -SHRA WARMFROPA
9*66 +19 33 +4 49.5 +11 15.5 .09 N 31 S9.2 C FROPA-SHRA-IP-SN
NEW STATION MAXIMUM RECORD TEMP
10 33 -12 25 -5 29.0 -8 36.0 T N 25 N7.5 PC -SHRA-IP-SHSN
11 44 0 28 0 36.0 0 29.0 W 27 S7.2 SU
12 61 +13 36 +6 48.5 +9 16.5 SW23 SSW8.8 PC
13 66 +19 46 +14 56.0 +16 9.0 SW24 SW6.9 PC MILDER
14 54 +5 44 +13 49.0 +9 16.0 .03 NE14 NE4.3 C SHRA +FG -DZ
15 59 +12 36 +4 47.5 +8 17.5 .68 NNE32 NNE5.4 PC +FG SHRA FROPA DZ
16 54 +7 30 +1 42.0 +4 23.0 SSW22 SW2.9 -PC FROST
17 59 +11 38 +9 48.5 +10 16.5 SW12 SE3.5 -PC
18 67 +17 47 +15 57.0 +16 8.0 .52 SSW32 S7.5 C SHRA BR TSRA(2)
FROPA
19 56 +11 38 +8 47.0 +10 18.0 WSW23 S7.5 SU
20 59 +12 39 +10 49.0 +11 16.0 SE17 SSE3.0-PC BR
21 68 +22 42 +12 55.0 +17 10.0 SSW16 SSE3.3 PC BR
22*69 +21 *51 +21 60.0 +21 5.0 SE12 SE3.8 PC +FG(AM) NEW STATION
MAX & MAX MIN TEMPS
23*74 +23 *59 +27 66.5 +25 1.5 .02 S24 S8.9 PC BR SHRA NEW STATION
MAX & MAX MIN TEMPS
24 67 +13 44 +11 55.5 +12 9.5 *1.34 NE20 N5.8 C SHRA BR RA FROPA
NEW DAILY PRECIP RECORD
25 55 +4 37 +4 46.0 +4 19.0 N 23 NNE4.3 SU BR(AM) FROPA
26 47 -1 *38 +8 42.5 +4 22.5 NNE20 NNE5.6 SU NEW STATION MAX
MIN TEMP
27 64 +15 36 +5 50.0 +10 15.0 SW23 SSW7.4 SU -FR (AM)
28*71 +22 48 +16 59.5 +19 5.5 WSW21 WSW6.5 PC MILD NEW STATION
MAX RECORD TEMP
29 58 +9 40 +10 49.0 +10 16.0 NNE26 NNE6.9-PC FROPA COOLER
30 46 -3 35 +4 40.5 0 24.5 NNE21 NNE4.8 SU BR FU -FROST
31 40 -9 33 +1 36.5 -4 28.5 T NE27 NNE8.9 PC BREEZY COLD -SHSN
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SUMMARY OF JANUARY 1999:
TEMPERATURE:
Monthly mean: High = 55.3 Low = 36.7 Mean = 46.0
Departure < Normal: High = + 6.8 Low = + 5.3 Mean = + 6.0
Degree Days: Heating = 590.0 Cooling = 1.5
Num er of Days Using: Heating = 30 Cooling = 1
Days with maximum temperature >= 90: 0
Days with maximum temperature <= 32: 1
Days with minimum temperature <= 32: 8
Days with minimum temperature <= 0: 0
PRECIPITATION:
Total month = 3.04" Departure from Normal = -1.06"
Normal month (to date) = 4.10" or 74%
Average daily = 0.10"
Normal daily = 0.13"
Number of days with measurable precipitation = 7
Year-to-date = 3.04" Departure = - 1.06" or 74% of normal
Maximum for January = 11.12" in 1987 --> (Since
Minimum for January = 1.07" in 1981 --> (1977)
Number of days with 0.01" or more: 7 Snowfall
Number of days with 0.10" or more: 4 January total = TRACE on the
Number of days with 0.50" or more: 3 9th and 10th
Number of days with 1.00" or more: 1 January max = 8.90" in 1980
DAILY EXTREMES: Low temperature = 17 on the 6th
High temperature = 74 on the 23rd
Maximum daily precipitation = 1.34" on the 24th
Maximum 24-hour rainfall = 1.36" on the 23rd-24th
Maximum barometric pressure = 30.807" on the 31st
Minimum barometric pressure = 29.614" on the 3rd
Frozen precip = TRACE on the 9th & 10th
WIND:
Maximum wind gust = S 40 MPH on the 3rd
NUMBER OF:
Days Cloudy: 6 Days with thunderstorms: 1
Days Partly Cloudy: 14 # of Thunderstorms: 2
Days Clear/Sunny: 11 Days with some type of snowfall: 3
Days with Fog/Ground Fog: 10
Days with Dense Fog: 3
Days with Frost: 5
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YEAR-TO-DATE: (through January 31st, 1999)
Temperatures Degree Days Precipitation
Mean maximum: 55.3 (+6.8) Heating: Aqueous: 3.04" (DEP -1.06") 74%
Mean minimum: 36.7 (+5.3) 590.0 Maximum monthly: 3.04"/JAN.
Mean monthly: 46.0 (+6.0) Cooling: Minimum monthly: 3.04"/JAN.
1.5
Highest: 74, January 23
Snowfall: TRACE"
Lowest: 17, January 6 Maximum daily: TRACE" (Jan. 9,10)
Days with max temperature >= 90: 0 Maximum monthly: TRACE" (Jan. 9,10)
Days with max temperature <= 32: 1
Days with min temperature <= 32: 8 Days with some type of
Days with temperature <= 0: 0 snowfall: 3
Days with measurable
Number of: precipitation: 7 or 22.58%
Days using Heating: 30
Days using Cooling: 1 Days with thunderstorms: 1
Days Cloudy: 6 Number of thunderstorms: 2
Days Partly Cloudy: 15
Days Clear/Sunny: 10 Greatest 24-hour daily rainfall:
Days with fog/ground fog: 10 1.34"/JAN. 24th
Days with dense fog: 3
Wind (Highest Gust): S 40 miles per hour, Janaury 3rd
Barometer: Highest 30.807" on January 31st
Lowest: 29.614" on January 3rd
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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; *New/tied record
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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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