Climatological Report (Daily)
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CDUS46 KSEW 210121
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
521 PM PST SAT DEC 20 2014


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 20 2014...
VALID TODAY AS OF 0500 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2014


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         50    459 PM  57    2009  45      5       47
                                      1973
  MINIMUM         44    510 AM  14    2008  35      9       33
                                      1990
  AVERAGE         47                        40      7       40

PRECIPITATION (IN)
  TODAY            0.69          1.93 1955   0.16   0.53     0.22
  MONTH TO DATE    3.40                      3.52  -0.12     0.92
  SINCE OCT 1     14.99                     13.57   1.42     6.25
  SINCE JAN 1     47.11                     35.66  11.45    31.82

SNOWFALL (IN)
  TODAY            0.0           3.0  2008                   1.1
  MONTH TO DATE    0.0                                       1.1
  SINCE OCT 1      0.8                                       1.1
  SINCE JUL 1      0.8                                       1.1
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  TODAY           18                        25     -7       25
  MONTH TO DATE  352                       485   -133      538
  SINCE DEC 1    352                       485   -133      538
  SINCE JUL 1   1192                      1668   -476     1560

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    369                       189    180      385
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   9   RESULTANT WIND DIRECTION  SE (130)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION     S (170)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION    SE (140)
  AVERAGE WIND SPEED     9.2


SKY COVER
  AVERAGE SKY COVER 0.9


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  LIGHT RAIN
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           100 PM
 LOWEST     83           100 AM
 AVERAGE    88

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   45        56      2005
 MINIMUM TEMPERATURE (F)   35        12      1990


SUNRISE AND SUNSET
DECEMBER 20 2014......SUNRISE   753 AM PST   SUNSET   420 PM PST
DECEMBER 21 2014......SUNRISE   754 AM PST   SUNSET   421 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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