Portsmouth Weather Records Service
 

Local Climatological Data
*Data Is Subject to Correction by PWRS

Station:  PORTSMOUTH, VIRGINIA
Month:   DECEMBER Year: 2004
Latitude: 36 48 04 N    Longitude: 76 19 37 W
Station Elevation: 20 FT 
Standard Time: EST
 LOCAL CLIMATOLOGICAL DATA (WS-TYPE FORM: F-6)

                                          STATION:   PORTSMOUTH, VIRGINIA
                                          MONTH:     DECEMBER
                                          YEAR:      2004
                                          LATITUDE:   36 48 04 N                   
                                          LONGITUDE:  76 19 40 W                   
NOTE: DATA MAY EXTEND BEYOND RIGHT MARGIN
================================================================================================================================
|-----TEMPERATURE IN F:---------| |RAIN---SNOW-||------WIND-----|BAROMETER||HUMID||SKY||---------------WEATHER-----------------|
                                                  AVG  AVG PK  PK  MAX  MIN MAX MIN DOM WX
DY MAX MIN   AVG   DEP   HDD   CDD  WTR  SNW DPTH DIR  SPD DIR SPD BAR  BAR HUM HUM SKY TYPES / NOTES
=================================================================================================================================
                                 
 1  66  41   53.5   +4  11.5   0.0  0.02 0.0    0 203  7.8 270 39 0095 9766  90  39  PC         SHRA WINDY FROPA
 2  58  32   45.0   -3  20.0   0.0  0.00 0.0    0 158  0.8 160 18 0211 9918  91  41  SU         -FROST
 3  57  37   47.0    0  18.0   0.0  0.00 0.0    0 270  1.5 270 17 0072 9884  88  37  SU         FROPA
 4  58  34   46.0   -2  19.0   0.0  0.00 0.0    0 045  0.5 270 16 0158 0060  85  41  SU 
 5  62  36   49.0   +2  16.0   0.0  0.00 0.0    0 270  0.0 270 10 0267 0103  81  37  SU
 6  61  44   52.5   +5  12.5   0.0  0.13 0.0    0 203  0.7 203 14 0274 0120  96  55   C 1       SHRA
 7  72  54   63.0  +16   2.0   0.0  0.03 0.0    0 203  4.8 203 22 0120 9825 100  77  PC 1       SHRA WARMFROPA
 8  70  47   58.5  +12   6.5   0.0  0.00 0.0    0 270  3.0 203 19 0181 9829  87  40  SU         FROPA
 9  64  46   55.0   +9  10.0   0.0  0.02 0.0    0 158  0.5 158 13 0163 9808 100  74  PC         SHRA BR WARMFROPA
10  71  59   65.0  +19   0.0   0.0  1.24 0.0    0 203  1.6 293 20 9808 9451 100  82  PC 13      SHRA TSRA WARMFROPA
11  59  44   51.5   +7  13.5   0.0  0.07 0.0    0 225  3.7 225 27 9716 9466  95  72  PC         FROPA SHRA
12  53  38   45.5   +1  19.5   0.0  0.00 0.0    0 270  3.1 225 19 9838 9716  82  55  PC
13  57  39   48.0   +2  17.0   0.0     T 0.0    0 270  5.9 270 32 0019 9703  72  31  PC         -SHRA FROPA WINDY
14  44  32   38.0   -7  27.0   0.0  0.00 0.0    0 360  2.6 360 24 0327 0019  65  45  PC         FROPA
15  39  27   33.0  -12  32.0   0.0  0.00 0.0    0 360  3.7 360 26 0527 0327  73  44  SU         WINDY(AM) COLD
16  49  23   36.0   -8  29.0   0.0  0.00 0.0    0 225  0.0 270 10 0560 0333  85  35  SU         FROST
17  54  33   43.5    0  21.5   0.0  0.00 0.0    0 225  0.0 225 13 0333 0234  62  33  SU
18  54  34   44.0   +1  21.0   0.0  0.00 0.0    0 045  1.5 045 13 0241 9852  92  64  PC
19  50  29   39.5   -3  25.5   0.0  0.02   T    T 360  2.0 293 34 9939 9658  97  58  PC         FROST SHRA FROPA SHSN WINDY(PM)
20  29  15   22.0  -20  43.0   0.0  0.08 0.8  0.8 360  5.8 338 34 0290 9765  84  39  PC         SN BLSN WINDY VERY COLD
21  50  19   34.5   -7  30.5   0.0  0.00 0.0    T 225  3.4 225 22 0296 0161  60  34  SU         
22  64  39   51.5  +10  13.5   0.0  0.00 0.0    0 158  0.9 158 15 0341 0162  83  40  PC         
23  68  43   55.5  +11   9.5   0.0  0.18 0.0    0 180  7.1 180 35 0168 9784 100  75   C         SHRA WINDY FROPA
24  42  33   37.5   -7  27.5   0.0  0.00 0.0    0 360  4.9 360 22 0232 0039  75  61   C         WINDY COLDER
25  35  32   33.5   -6  31.5   0.0  0.00 0.0    0 045  4.8 360 24 0289 0172  77  55   C         BREEZY COLD
26  37  27   32.0   -6  33.0   0.0  0.80 5.0  5.0 300  3.4 360 27 0236 9936  98  77   C 1       -RA +SN
27  33  26   29.5   -9  35.5   0.0  0.00 0.0  3.0 360  5.0 360 30 0658 0180  82  45  SU         WINDY (AM) COLD
28  36  22   29.0  -13  36.0   0.0  0.00 0.0  2.0 158  4.0 360  5 0702 0440  78  55  SU         COLD
29  53  32   42.5    0  22.5   0.0  0.00 0.0    T 225  0.8 248 16 0445 0264  69  45  SU         MILDER
30  56  35   45.5   +4  19.5   0.0  0.00 0.0    0 045  0.2 045 12 0528 0346  90  52  PC
31  63  37   50.0   +7  15.0   0.0  0.00 0.0    0 225  0.2 225 10 0500 0370 100  61  PC         BR FG
=============================================================================================================================
SM                     638.5   0.0  2.59 5.8     
==============================================================================================================================
AV 53.7 35.1 44.4 +0.2             -0.43          225 2.72        0243 9990  85  52
===============================================================================================================================
NOTES:
WINDS IN M.P.H.
                      
 CLIMATOLOGICAL DATA (WS-TYPE FORM: F-6) , PAGE 2

                                          STATION:  PORTSMOUTH, VIRGINIA
                                          MONTH:    DECEMBER
                                          YEAR:     2004
                                          LATITUDE:   36 48 04 N                   
                                          LONGITUDE:  76 19 40 W                   

[TEMPERATURE DATA]      [PRECIPITATION DATA]               SYMBOLS USED IN WX TYPES COLUMN

AVERAGE MAXIMUM: 53.7   TOTAL FOR MONTH:   2.59"           1 = FOG
AVERAGE MAX DEP: +0.9   DPTR FM NORMAL:   -0.43" OR  86%   2 = FOG REDUCING VISIBILITY
AVERAGE MINIMUM: 35.1   GRTST 24HR  1.26" ON  9-10TH           TO 1/4 MILE OR LESS
AVERAGE MIN DEP: -0.4   GRTST DAILY 1.24" ON  10TH         3 = THUNDER
AVERAGE MONTHLY: 44.4   SNOW, ICE PELLETS, GLAZE           4 = ICE PELLETS              
AVERAGE MON DEP: +0.2   TOTAL MONTH:  5.8"                 5 = HAIL
                        GRTST DAILY   5.0" ON 26TH         6 = GLAZE OR RIME            
HIGHEST: 72 ON    7     GRTST 24HR    5.0" ON 26TH         7 = BLOWING DUST OR SAND:    
LOWEST:  15      20     GRTST DEPTH:  5.0" ON 26TH             VSBY  MILE OR LESS    
                                                           8 = SMOKE OR HAZE            
[NO. OF DAYS WITH]      [PRECIP  - DAYS WITH MEASURABLE]   9 = BLOWING SNOW             
                                                           X = TORNADO                  
MAX 32 OR BELOW:   1    0.01 INCH OR MORE:  10 OR 32.26%
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   4                                  
MIN 32 OR BELOW:  12    0.50 INCH OR MORE:   2                                  
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   1                                  

[HDD (BASE 65) ]                                   [# DAYS WITH]
TOTAL THIS MO. 638.5 
                        CLEAR  (SCALE 0-3)  12      6 FOG
                        PTCLDY (SCALE 4-7)  14      1 DENSE FOG    [VSBY  MILE OR LESS]
SEASONAL      1154.5    CLOUDY (SCALE 8-10)  5      1 THUNDERSTORMS              
                                                    1 # OF THUNDERSTORMS
[CDD (BASE 65) ]                                    3 SNOW                         
TOTAL THIS MO.   0.0                                3 FROST
                        [PRESSURE DATA]                       [AVERAGE SKY COVER]
SEASONAL TOTAL 1688.5   HIGHEST SLP 30.702" ON THE 28TH                 39.84% 
                        LOWEST  SLP 29.451" ON THE 10TH 
                        AVERAGE SLP 30.116"
[STATION RECORDS]

 DECEMBER 2004 SNOWFALL MONTHLY MAXIMUM 5.8" [PREVIOULSY 1.7" 1993]
 1ST - WIND GUST 39 MPH [ PREVIOUSLY 36 MPH IN 1996 ]
15TH - TEMPERATURE MINIMUM MAXIMUM 39 [ PREVIOUSLY 44 IN  1985 ]
19TH - SNOWFALL TIED TRACE [PREVIOUSLY TRACE 2003]
20TH - TEMPERATURE MINIMUM 15 [ PREVIOUSLY 16 1981 ]
20TH - TEMPERATURE MINIMUM MAXIMUM 29 [PREVIOUSLY 33 IN 1981]
20TH - SNOWFALL 0.8" [PREVIOUSLY TRACE IN 1985 ]
23RD - WIND GUST 35 MPH [ PREVIOUSLY 32 MPH IN 1994 ]
26TH - SNOWFALL 5.0" [ NO PREVIOUS STATION RECORD ]
26TH - PRECIPITATION 0.80" [ PREVIOUSLY 0.46" IN 1976 ]
27TH - WIND GUST 30 MPH [ PREVIOUSLY 23 MPH IN 1977 ]
27TH - TEMPERATURE MINIMUM MAXIMUM TIED 33 [ PREVIOUSLY IN 1989 ]
28TH - TEMPERATURE MINIMUM 22 [ PREVIOUSLY 23 IN 1977 ]

YEAR-TO-DATE

[TEMPERATURE DATA]      [PRECIPITATION DATA]

AVERAGE MAXIMUM: 69.0   TOTAL FOR YEAR:   49.56"
AVERAGE MAX DEP: -0.5   DPTR FM NORMAL:   + 1.36 OR 103%
AVERAGE MINIMUM: 52.1   GRTST 24HR  2.99" ON  8/14-15     
AVERAGE MIN DEP: +0.8   GRTST DAILY 2.95" ON  8/14                         
AVERAGE MONTHLY: 60.6   SNOW, ICE PELLETS, GLAZE
AVERAGE MON DEP: +0.2   TOTAL:          12.3"                                   
                        GRTST DAILY   5.0" ON DECEMBER 26TH
HIGHEST: 93 ON  6/18    GRTST 24HR    5.0" ON DECEMBER 26TH
                7/07    GRTST DEPTH:  5.0" ON DECEMBER 26TH
LOWEST:  15 ON  12/20

[NO. OF DAYS WITH]      [PRECIP  - DAYS WITH MEASURABLE]                        
                                                                                
MAX 32 OR BELOW:   4    0.01 INCH OR MORE: 122  OR 33.33%
MAX 90 OR ABOVE:  13    0.10 INCH OR MORE:  82                                  
MIN 32 OR BELOW:  57    0.50 INCH OR MORE:  31                                  
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:  13

[HDD (BASE 65) ]                                   [# DAYS WITH]
TOTAL         3316.5    CLEAR  (SCALE 0-3)  98    167 FOG                          
                        PTCLDY (SCALE 4-7) 196      4 DENSE FOG    [VSBY  MILE OR LESS]
                        CLOUDY (SCALE 8-10) 72     36 THUNDERSTORMS              
                                                   39 # OF THUNDERSTORMS
[CDD (BASE 65) ]                                   11 SNOW                         
TOTAL         1688.5                               12 FROST                     
                        [PRESSURE DATA]                                         
                        HIGHEST SLP 30.736" ON NOVEMBER 14TH    
                        LOWEST  SLP 29.345" ON THE 18TH OF JANUARY  
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, inoper- ative 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

METAR DENOTATIONS


BC   Patches
BL   Blowing 
BR   Fog with visibilites > 1/4 but <=6 statute miles and
below to 1/4 mile
DU   Dust (widespread)
DS   Duststorm
DZ   Drizzle
FC   Funnel Cloud
FC+  Tornado/waterspout
FG   Fog with visibility <= 1/4 statute miles
FU   Smoke
FZDZ Freezing drizzle
FZRA Freezing rain
FZFG Freezing fog
GR   Hail
GS   Small hail
HZ   Haze
IC   Ice crystals
PL   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
V V   Used for obscurred sky

METAR Qualifiers: (now placed in FRONT of code)

-  Light     + Heavy      DR Low drifting    M  Below ( -x.x degrees)
                                       MI Shallow     PR Partial