Climatological Report (Daily)
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207
CDUS46 KSEW 180133
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
633 PM PDT TUE OCT 17 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 17 2017...
VALID TODAY AS OF 0600 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         60    251 PM  74    1989  59      1       59
  MINIMUM         50    743 AM  34    1949  46      4       50
  AVERAGE         55                        52      3       55

PRECIPITATION (IN)
  TODAY            0.06          1.24 2009   0.11  -0.05     0.17
  MONTH TO DATE    0.64                      1.50  -0.86     5.89
  SINCE OCT 1      0.64                      1.50  -0.86     5.89
  SINCE JAN 1     29.65                     23.59   6.06    30.67

SNOWFALL (IN)
  TODAY            0.0          MM      MM                   0.0
  MONTH TO DATE    0.0                                       0.0
  SINCE OCT 1      0.0                                       0.0
  SINCE JUL 1      0.0                                       0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  TODAY           10                        13     -3       10
  MONTH TO DATE  198                       176     22      158
  SINCE SEP 1    276                       308    -32      267
  SINCE JUL 1    283                       393   -110      288

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE SEP 1     75                        21     54        3
  SINCE JAN 1    392                       189    203      291
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED  14   RESULTANT WIND DIRECTION   S (200)
  HIGHEST WIND SPEED    30   HIGHEST WIND DIRECTION     S (200)
  HIGHEST GUST SPEED    40   HIGHEST GUST DIRECTION    SW (210)
  AVERAGE WIND SPEED    MM


SKY COVER
  AVERAGE SKY COVER 0.7


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93          1000 AM
 LOWEST     53           300 PM
 AVERAGE    73

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   59        70      1974
 MINIMUM TEMPERATURE (F)   45        32      1949


SUNRISE AND SUNSET
OCTOBER 17 2017.......SUNRISE   731 AM PDT   SUNSET   617 PM PDT
OCTOBER 18 2017.......SUNRISE   733 AM PDT   SUNSET   615 PM PDT


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




$$




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