Climatological Report (Daily)
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CDUS46 KSEW 100847
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1247 AM PST SAT DEC 10 2016


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 9 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2016


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         36   1159 PM  61    2014  46    -10       54
  MINIMUM         31    301 AM  18    2009  36     -5       46
  AVERAGE         34                        41     -7       50

PRECIPITATION (IN)
  YESTERDAY        0.34          1.78 1956   0.17   0.17     0.53
  MONTH TO DATE    1.27                      1.70  -0.43     5.96
  SINCE OCT 1     17.80                     11.75   6.05    19.14
  SINCE JAN 1     42.58                     33.84   8.74    39.58

SNOWFALL (IN)
  YESTERDAY        T   R         T    1978                   0.0
  MONTH TO DATE    0.5                                       0.0
  SINCE OCT 1      0.5                                       0.0
  SINCE JUL 1      0.5                                       0.0
  SNOW DEPTH       1

DEGREE DAYS
 HEATING
  YESTERDAY       31                        24      7       15
  MONTH TO DATE  236                       212     24      142
  SINCE DEC 1    236                       212     24      142
  SINCE JUL 1   1087                      1395   -308     1153

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    291                       189    102      474
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED  11   RESULTANT WIND DIRECTION  SE (120)
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION     E (110)
  HIGHEST GUST SPEED    26   HIGHEST GUST DIRECTION     E (90)
  AVERAGE WIND SPEED    12.7


SKY COVER
  AVERAGE SKY COVER 1.0


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    92          1200 AM
 LOWEST     82           400 AM
 AVERAGE    87

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   46        66      2014
 MINIMUM TEMPERATURE (F)   36        16      2009


SUNRISE AND SUNSET
DECEMBER 10 2016......SUNRISE   746 AM PST   SUNSET   418 PM PST
DECEMBER 11 2016......SUNRISE   747 AM PST   SUNSET   418 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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