April 1998

Text summary is followed by graphs!


 

 FRI, MAY 1, 1998 6:45 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 April 1998.
 Time is EST/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 79 +12  66 +21  72.5 +16       7.5 1.13 SSW23  6.3SSW PC TSRA FROPA   
  2 81 +13  61 +17  71.0 +15       6.0      SW 27  7.4SW  SU FROPA (LATE EVE)
  3 68  +1  53  +7  60.5  +4  4.5           NNE18  4.8SE  PC         
  4 57 -12  44  -4  50.5  -8 14.5      1.50 N  46  9.5N    C RA SHRA BR FROPA
  5 54 -13  42  -5  48.0  -9 17.0           N  31  9.5N   PC WINDY(AM) COOL
  6 63  -2  38  -7  50.5  -4 14.5           N  22  5.5N   SU
  7 73  +8  43  -1  58.0  +3  7.0           NE 15  3.5SE  PC -BR(AM)
  8 84 +17  57 +11  70.5 +14       5.5      SSW28  7.4SSW PC BR(AM)
  9 79 +14  55 + 9  67.0 +11       2.0 0.38 SSW38  7.2SSW PC SHRA TSRA
 10 56 -10  45   0  50.5  +5 14.5      0.18 N  16  4.4N   PC SHRA BR COLDER
 11 57 -12  42  -2  49.5  -7 15.5           N  24  5.4N   SU BREEZY
 12 60 -11  39  -7  49.5  -9 15.5           NE 16  2.9NE  SU 
 13 70  +1  39 -10  54.5  -4 10.5           N  16  3.4SW  SU 
 14 67   0  51  +2  59.0  +1  6.0      0.04 SW 30  7.8SW   C -SHRA FROPA
 15 81 +12  56  +7  68.5  +9       3.5      SW 21  5.8SW  SU PLEASANT
 16 82 +13  61 +12  71.5 +12       6.5    T SW 25  7.0SW  PC -BR(AM) -SHRA
 17 82 +12  68 +19  75.0 +15      10.0 0.06 SW 28  7.6SSW PC -BR(AM) SHRA
 18 72  +3  53  +6  62.5  +4  2.5      0.08 N  25  5.8NE   C DSTLTG FROPA -RA
 19 80  +9  53  +4  66.5  +6       1.5 0.06 SSW23  5.0SSW PC BR -RA SHRA
 20 67  -3  55  +6  61.0  +1  4.0      0.05 N  20  6.1N   PC FROPA(AM) BR SHRA 
 21 65  -7  47  -4  56.0  -5  9.0           NE 18  2.7NE  PC
 22 60 -10  50  +1  55.0  -4 10.0      0.57 NE 21  4.7NE   C RA WINDY
 23 63  -7  50   0  56.5  -3  8.5           NE 21  6.3N   PC
 24 74  +1  49  -1  61.5   0  3.5           W  30  5.7W   PC PLEASANT
 25 82  +8  51  +1  66.5  +4       1.5      W  21  5.2W   PC PLEASANT
 26 82 +10  59  +8  70.5  +9       5.5      SSW29  8.1SW  PC WARM
 27 69  -5  47  -5  58.0  -5  7.0           N  24  6.8N   PC FROPA COLDER
 28 61 -11  41 -12  51.0 -11 14.0           N  18  3.3N   SU CHILLY -BR(AM)
 29 73   0  45  -6  59.0  -3  6.0           SSW18  3.4SSW -PC -BR(AM) FU
 30 77  +3  53  +1  65.0  +2                SSW21  5.0SSW PC +FU MILD
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 SUMMARY OF APRIL 1998:

 TEMPERATURE:

    Monthly mean:        High =  70.6   Low =  50.4   Mean =  60.5
    Departure < Normal:  High = + 1.0   Low = + 2.3   Mean = + 1.6 

    Degree Days:            Heating =  184.0   Cooling =   49.5
    Number of Days Using:   Heating =    19    Cooling =    10

    Days with maximum temperature >= 90:  0
    Days with maximum temperature <= 32:  0
    Days with minimum temperature <= 32:  0
    Days with minimum temperature <=  0:  0

 PRECIPITATION:

     Total  month =          4.05"   Departure from Normal =  + 0.58"
     Normal month (to date)  3.47"                            or 117%
     Average daily =         0.12"        
     Normal daily =          0.12" 
     Number of days with measurable precipitation =   10
     
     Year-to-date =  21.30" Departure =  + 5.78" or 137% of normal

     Maximum for April  =   7.08" in 1991      -->  (Since
     Minimum for April  =   1.21" in 1985      -->  (1977)

     Number of days with 0.01" or more: 10          Snowfall
     Number of days with 0.10" or more:  5    April total =  0.00
     Number of days with 0.50" or more:  3    April   max =  1.10" in
     Number of days with 1.00" or more:  2                     1983

  DAILY EXTREMES:   Low  temperature =  38 on the 6th
		    High temperature =  84 on the 8th
 	 Maximum daily precipitation = 1.50" on the 4th
	    Maximum 24-hour rainfall = 1.50" on the 4th
		   Maximum wind gust = N 46 mph on the 4th
	 Maximum barometric pressure = 30.412" on the 29th 
         Minimum barometric pressure = 29.200" on the 9th

				  NUMBER OF:

 Days Cloudy:               4        Days with thunderstorms:  2
 Days Partly Cloudy:       19             # of Thunderstorms:  2
 Days Clear/Sunny:          7 Days with some type of snowfall: 0
 Days with Fog/Ground Fog: 11
 Days with Dense Fog:       0
 Days with Frost:           0
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 YEAR-TO-DATE: (through April 30th, 1998)

 Temperatures             Degree Days        Precipitation

 Mean maximum: 60.3 (+3.0) Heating: Aqueous:  21.30" (DEP +5.78") 137%
 Mean minimum: 43.4 (+5.3)  1678.0    Maximum monthly:  7.60"/FEB.
 Mean monthly: 51.9 (+4.2) Cooling:   Minimum monthly:  3.90"/MAR.
			     100.0
 Highest:      88, March 30   
				    Snowfall:           0.00"
 Lowest:       24, January 1          Maximum daily:    0.00"
 Days with max temperature >= 90:  0  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: 42 or 35.00%
 Days using Heating:       101
 Days using Cooling:        18        Days with thunderstorms: 5
 Days Cloudy:               29        Number of thunderstorms: 5
 Days Partly Cloudy:        63   
 Days Clear/Sunny:          28        Greatest 24-hour period
 Days with fog/ground fog:  51           rainfall: 3.86"/FEB. 4th

 Wind (Highest Gust): SE 53 miles per hour, January 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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April 98 Temp Graph
April 98 Rain/Rel Hum Graph
April 98 Wind Graph
April 98 Barometer & Rel Hum%

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