WFO Monthly/Daily Climate Data
Issued by NWS Sterling, VA

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CXUS51 KLWX 170620
CF6DCA
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   WASHINGTON NATIONAL DC
                                          MONTH:     DECEMBER
                                          YEAR:      2017
                                          LATITUDE:   38 50 N
                                          LONGITUDE:  77  2 W

  TEMPERATURE IN F:       :PCPN:    SNOW:  WIND      :SUNSHINE: SKY     :PK WND
================================================================================
1   2   3   4   5  6A  6B    7    8   9   10  11  12  13   14  15   16   17  18
                                     12Z  AVG MX 2MIN
DY MAX MIN AVG DEP HDD CDD  WTR  SNW DPTH SPD SPD DIR MIN PSBL S-S WX    SPD DR
================================================================================

 1  57  42  50   6  15   0 0.00  0.0    0  8.1 20 330   M    M   2 1      23 320
 2  53  36  45   1  20   0 0.00  0.0    0  3.0 10  50   M    M   5        11  50
 3  57  38  48   5  17   0 0.03  0.0    0  4.3 15 340   M    M   5 1      20 300
 4  56  36  46   3  19   0 0.00  0.0    0  4.6 15 160   M    M   6 8      17 160
 5  60  45  53  10  12   0 0.07  0.0    0  8.6 20 180   M    M   9 1      24 190
 6  57  42  50   8  15   0    T  0.0    0 11.4 31 330   M    M  10        37 310
 7  51  40  46   4  19   0 0.00  0.0    0  7.9 16 310   M    M   8        22 310
 8  42  37  40  -2  25   0 0.00  0.0    0  5.3 14 180   M    M  10        16 180
 9  38  32  35  -6  30   0 0.18  1.5    0  7.2 15  10   M    M  10 1      19  10
10  41  30  36  -5  29   0 0.00  0.0    2  7.0 16 270   M    M   8        22 280
11  49  35  42   1  23   0 0.00  0.0    0  7.2 17 180   M    M   6        20 170
12  49  25  37  -3  28   0 0.00  0.0    0 13.4 30 320   M    M   9        39 310
13  37  23  30 -10  35   0    T    T    0 15.1 29 300   M    M   5 8      37 300
14  44  31  38  -2  27   0 0.00  0.0    0 12.7 26 330   M    M   7        34 340
15  31  25  28 -12  37   0 0.01  0.2    0  5.6 13  50   M    M   8 1      18  30
16  48  25  37  -2  28   0 0.00  0.0    0  8.8 21 200   M    M   3        26 210
================================================================================
SM  770  542       379   0  0.29     1.7 130.2          M      111
================================================================================
AV 48.1 33.9                               8.1 FASTST   M    M   7    MAX(MPH)
                                 MISC ---->  # 31 330               # 39  310
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2

                                          STATION:  WASHINGTON NATIONAL DC
                                          MONTH:    DECEMBER
                                          YEAR:     2017
                                          LATITUDE:   38 50 N
                                          LONGITUDE:  77  2 W

[TEMPERATURE DATA]      [PRECIPITATION DATA]       SYMBOLS USED IN COLUMN 16

AVERAGE MONTHLY: 41.0   TOTAL FOR MONTH:   0.29    1 = FOG OR MIST
DPTR FM NORMAL:  -0.6   DPTR FM NORMAL:   -1.39    2 = FOG REDUCING VISIBILITY
HIGHEST:    60 ON  5    GRTST 24HR  0.18 ON  9- 9      TO 1/4 MILE OR LESS
LOWEST:     23 ON 13                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:   1.7 INCHES  5 = HAIL
                        GRTST 24HR   1.5 ON  9- 9  6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:   2 ON 10     7 = DUSTSTORM OR SANDSTORM:
                                                       VSBY 1/2 MILE OR LESS
                                                   8 = SMOKE OR HAZE
[NO. OF DAYS WITH]      [WEATHER - DAYS WITH]      9 = BLOWING SNOW
                                                   X = TORNADO
MAX 32 OR BELOW:   1    0.01 INCH OR MORE:   4
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   1
MIN 32 OR BELOW:   7    0.50 INCH OR MORE:   0
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0

[HDD (BASE 65) ]
TOTAL THIS MO.   379    CLEAR  (SCALE 0-3)   1
DPTR FM NORMAL     4    PTCLDY (SCALE 4-7)   8
TOTAL FM JUL 1   928    CLOUDY (SCALE 8-10)  7
DPTR FM NORMAL  -142

[CDD (BASE 65) ]
TOTAL THIS MO.     0
DPTR FM NORMAL     0    [PRESSURE DATA]
TOTAL FM JAN 1  1826    HIGHEST SLP 30.02 ON  6
DPTR FM NORMAL   277    LOWEST  SLP 29.51 ON 14

[REMARKS]



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