Climatological Report (Daily)
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CDUS46 KSEW 220120
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
520 PM PST SUN DEC 21 2014


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 21 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         55    239 PM  56    2005  45     10       48
  MINIMUM         51    459 PM  12    1990  35     16       42
  AVERAGE         53                        40     13       45

PRECIPITATION (IN)
  TODAY            0.00          0.99 1964   0.17  -0.17     0.22
  MONTH TO DATE    3.48                      3.69  -0.21     1.14
  SINCE OCT 1     15.07                     13.74   1.33     6.47
  SINCE JAN 1     47.19                     35.83  11.36    32.04

SNOWFALL (IN)
  TODAY            0.0           3.0  2008                   0.0
  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           12                        25    -13       20
  MONTH TO DATE  361                       510   -149      558
  SINCE DEC 1    361                       510   -149      558
  SINCE JUL 1   1201                      1693   -492     1580

 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  13   RESULTANT WIND DIRECTION  SW (220)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION    SW (230)
  HIGHEST GUST SPEED    33   HIGHEST GUST DIRECTION    SW (220)
  AVERAGE WIND SPEED    13.1


SKY COVER
  AVERAGE SKY COVER 0.8


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    83          1200 AM
 LOWEST     71           200 PM
 AVERAGE    77

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   45        57      2005
 MINIMUM TEMPERATURE (F)   35        14      1983


SUNRISE AND SUNSET
DECEMBER 21 2014......SUNRISE   754 AM PST   SUNSET   421 PM PST
DECEMBER 22 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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