Climatological Report (Daily)
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CDUS46 KSEW 110830
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1230 AM PST SUN DEC 11 2016


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 10 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         44    128 PM  66    2014  46     -2       53
  MINIMUM         35    304 AM  16    2009  36     -1       43
  AVERAGE         40                        41     -1       48

PRECIPITATION (IN)
  YESTERDAY        0.18          1.55 1977   0.17   0.01     0.37
  MONTH TO DATE    1.45                      1.87  -0.42     6.33
  SINCE OCT 1     17.98                     11.92   6.06    19.51
  SINCE JAN 1     42.76                     34.01   8.75    39.95

SNOWFALL (IN)
  YESTERDAY        0.0           2.8  1992                   0.0
  MONTH TO DATE    1.0                                       0.0
  SINCE OCT 1      1.0                                       0.0
  SINCE JUL 1      1.0                                       0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       25                        24      1       17
  MONTH TO DATE  261                       236     25      159
  SINCE DEC 1    261                       236     25      159
  SINCE JUL 1   1112                      1419   -307     1170

 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   S (180)
  HIGHEST WIND SPEED    23   HIGHEST WIND DIRECTION     S (190)
  HIGHEST GUST SPEED    35   HIGHEST GUST DIRECTION     S (170)
  AVERAGE WIND SPEED    12.4


SKY COVER
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           200 AM
 LOWEST     76          1200 PM
 AVERAGE    88

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   46        58      2014
 MINIMUM TEMPERATURE (F)   35        21      2009


SUNRISE AND SUNSET
DECEMBER 11 2016......SUNRISE   747 AM PST   SUNSET   418 PM PST
DECEMBER 12 2016......SUNRISE   748 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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