Climatological Report (Daily)
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CDUS46 KSEW 180829
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1229 AM PST THU DEC 18 2014


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 17 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         48    220 PM  57    1994  45      3       47
  MINIMUM         43    447 AM  11    1964  35      8       40
  AVERAGE         46                        40      6       44

PRECIPITATION (IN)
  YESTERDAY        0.11          1.61 1979   0.16  -0.05     0.00
  MONTH TO DATE    2.08                      3.03  -0.95     0.65
  SINCE OCT 1     13.67                     13.08   0.59     5.98
  SINCE JAN 1     45.79                     35.17  10.62    31.55

SNOWFALL (IN)
  YESTERDAY        0.0           0.1  1992                   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       19                        25     -6       21
  MONTH TO DATE  300                       410   -110      461
  SINCE DEC 1    300                       410   -110      461
  SINCE JUL 1   1140                      1593   -453     1483

 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   4   RESULTANT WIND DIRECTION  SE (120)
  HIGHEST WIND SPEED    12   HIGHEST WIND DIRECTION     E (100)
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION     E (100)
  AVERAGE WIND SPEED     3.6


SKY COVER
  AVERAGE SKY COVER 0.9


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    92          1000 PM
 LOWEST     50          1200 AM
 AVERAGE    71

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   45        54      2004
                                             2003
                                             1972
 MINIMUM TEMPERATURE (F)   35        18      1964


SUNRISE AND SUNSET
DECEMBER 18 2014......SUNRISE   752 AM PST   SUNSET   420 PM PST
DECEMBER 19 2014......SUNRISE   753 AM PST   SUNSET   420 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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