Climatological Report (Daily)
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CDUS46 KSEW 200828
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1228 AM PST SAT DEC 20 2014


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 19 2014...

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)
 YESTERDAY
  MAXIMUM         52    152 PM  56    1994  45      7       41
                                      1969
  MINIMUM         45   1141 PM  17    1990  35     10       32
                                      1949
  AVERAGE         49                        40      9       37

PRECIPITATION (IN)
  YESTERDAY        0.12          1.19 1953   0.17  -0.05     0.00
  MONTH TO DATE    2.71                      3.36  -0.65     0.70
  SINCE OCT 1     14.30                     13.41   0.89     6.03
  SINCE JAN 1     46.42                     35.50  10.92    31.60

SNOWFALL (IN)
  YESTERDAY        0.0           3.3  1964                   0.0
  MONTH TO DATE    0.0                                        T
  SINCE OCT 1      0.8                                        T
  SINCE JUL 1      0.8                                        T
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       16                        25     -9       28
  MONTH TO DATE  334                       460   -126      513
  SINCE DEC 1    334                       460   -126      513
  SINCE JUL 1   1174                      1643   -469     1535

 COOLING
  YESTERDAY        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   S (180)
  HIGHEST WIND SPEED    18   HIGHEST WIND DIRECTION     S (200)
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION     S (200)
  AVERAGE WIND SPEED     9.5


SKY COVER
  AVERAGE SKY COVER 0.9


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93          1200 AM
 LOWEST     61           300 PM
 AVERAGE    77

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   45        57      2009
                                             1973
 MINIMUM TEMPERATURE (F)   35        14      2008
                                             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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