Climatological Report (Daily)
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000
CDUS46 KSEW 140829
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1229 AM PST THU DEC 14 2017


...................................

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 13 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         48    221 PM  59    1952  46      2       38
  MINIMUM         34    800 AM  19    1972  35     -1       31
  AVERAGE         41                        40      1       35

PRECIPITATION (IN)
  YESTERDAY        0.00          1.63 2001   0.17  -0.17     0.00
  MONTH TO DATE    1.11                      2.37  -1.26     1.63
  SINCE OCT 1     14.54                     12.42   2.12    18.16
  SINCE JAN 1     43.55                     34.51   9.04    42.94

SNOWFALL (IN)
  YESTERDAY        0.0           0.8  2008                   0.0
  MONTH TO DATE    0.0                                       1.0
  SINCE OCT 1      0.4                                       1.0
  SINCE JUL 1      0.4                                       1.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       24                        25     -1       30
  MONTH TO DATE  316                       310      6      340
  SINCE DEC 1    316                       310      6      340
  SINCE JUL 1   1305                      1493   -188     1191

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    392                       189    203      291
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   9   RESULTANT WIND DIRECTION   N (20)
  HIGHEST WIND SPEED    21   HIGHEST WIND DIRECTION     N (1)
  HIGHEST GUST SPEED    23   HIGHEST GUST DIRECTION     N (1)
  AVERAGE WIND SPEED     9.6


SKY COVER
  AVERAGE SKY COVER 0.5


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    92           200 AM
 LOWEST     65           400 PM
 AVERAGE    79

..........................................................


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   45        59      2002
 MINIMUM TEMPERATURE (F)   35        18      1945


SUNRISE AND SUNSET
DECEMBER 14 2017......SUNRISE   750 AM PST   SUNSET   419 PM PST
DECEMBER 15 2017......SUNRISE   750 AM PST   SUNSET   419 PM PST


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




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