WFO Monthly/Daily Climate Data
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000
CXUS55 KSEW 150930
CF6SEA
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   SEATTLE-TACOMA WA AIRPORT
                                          MONTH:     DECEMBER
                                          YEAR:      2018
                                          LATITUDE:   47 27 N
                                          LONGITUDE: 122 18 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  46  39  43   1  22   0 0.07  0.0    0  2.5  8  20   M    M   9 1      10  40
 2  46  40  43   1  22   0 0.06  0.0    0  3.5  8  90   M    M   9 1       9  80
 3  47  35  41  -1  24   0 0.00  0.0    0  8.8 17  20   M    M   4 12     22  20
 4  47  32  40  -2  25   0 0.00  0.0    0 10.7 16  20   M    M   1        19  10
 5  45  31  38  -3  27   0 0.00  0.0    0 12.6 20  20   M    M   0        24  30
 6  46  33  40  -1  25   0 0.00  0.0    0  9.5 17 100   M    M   2        23 120
 7  44  34  39  -2  26   0 0.00  0.0    0  8.1 17 110   M    M   6        22  90
 8  48  40  44   3  21   0    T  0.0    0  9.3 20 110   M    M   9        25 120
 9  48  42  45   4  20   0 0.59  0.0    0 12.3 21 120   M    M  10 1      26 120
10  49  42  46   5  19   0 0.09  0.0    0  9.6 16 170   M    M   7 1      21 170
11  50  43  47   6  18   0 0.73  0.0    0 11.8 25 190   M    M  10 1      30 190
12  49  39  44   4  21   0 0.07  0.0    0 11.2 22 180   M    M   8        30 180
13  52  45  49   9  16   0 0.29  0.0    0  9.0 20 190   M    M  10 8      26 190
14  57  43  50  10  15   0 0.01  0.0    0 13.0 41 180   M    M   8 8      54 180
================================================================================
SM  674  538       301   0  1.91     0.0 131.9          M       93
================================================================================
AV 48.1 38.4                               9.4 FASTST   M    M   7    MAX(MPH)
                                 MISC ---->  # 41 180               # 54  180
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

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

                                          STATION:  SEATTLE-TACOMA WA AIRPORT
                                          MONTH:    DECEMBER
                                          YEAR:     2018
                                          LATITUDE:   47 27 N
                                          LONGITUDE: 122 18 W

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

AVERAGE MONTHLY: 43.3   TOTAL FOR MONTH:   1.91    1 = FOG OR MIST
DPTR FM NORMAL:   2.2   DPTR FM NORMAL:   -0.63    2 = FOG REDUCING VISIBILITY
HIGHEST:    57 ON 14    GRTST 24HR  0.73 ON 11-11      TO 1/4 MILE OR LESS
LOWEST:     31 ON  5                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:   0.0 INCH    5 = HAIL
                        GRTST 24HR     0.0         6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:   0           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:   0    0.01 INCH OR MORE:   8
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   3
MIN 32 OR BELOW:   2    0.50 INCH OR MORE:   2
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0

[HDD (BASE 65) ]
TOTAL THIS MO.   301    CLEAR  (SCALE 0-3)   3
DPTR FM NORMAL   -34    PTCLDY (SCALE 4-7)   4
TOTAL FM JUL 1  1244    CLOUDY (SCALE 8-10)  7
DPTR FM NORMAL  -274

[CDD (BASE 65) ]
TOTAL THIS MO.     0
DPTR FM NORMAL     0    [PRESSURE DATA]
TOTAL FM JAN 1   404    HIGHEST SLP M ON M
DPTR FM NORMAL   215    LOWEST  SLP 29.47 ON 14

[REMARKS]


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