Climatological Report (Daily)
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000
CDUS46 KSEW 160829
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
129 AM PDT WED AUG 16 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 15 2017...

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)
 YESTERDAY
  MAXIMUM         78    505 PM  96    2010  77      1       83
  MINIMUM         55    500 AM  47    1955  56     -1       57
  AVERAGE         67                        66      1       70

PRECIPITATION (IN)
  YESTERDAY        0.00          1.20 1950   0.03  -0.03     0.00
  MONTH TO DATE    0.02                      0.34  -0.32     0.16
  SINCE OCT 1     48.82                     35.45  13.37    48.11
  SINCE JAN 1     28.42                     20.05   8.37    23.72

DEGREE DAYS
 HEATING
  YESTERDAY        0                         1     -1        0
  MONTH TO DATE    0                        15    -15        5
  SINCE JUN 1    105                       208   -103      107
  SINCE JUL 1      6                        64    -58       16

 COOLING
  YESTERDAY        2                         2      0        5
  MONTH TO DATE  106                        44     62       52
  SINCE JUN 1    236                       136    100      181
  SINCE JAN 1    255                       142    113      207
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   5   RESULTANT WIND DIRECTION   N (360)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION     N (20)
  HIGHEST GUST SPEED    18   HIGHEST GUST DIRECTION     N (20)
  AVERAGE WIND SPEED     7.6


SKY COVER
  AVERAGE SKY COVER 0.2


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    83           500 AM
 LOWEST     25           600 PM
 AVERAGE    54

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   77        98      1967
 MINIMUM TEMPERATURE (F)   56        47      1946


SUNRISE AND SUNSET
AUGUST 16 2017........SUNRISE   607 AM PDT   SUNSET   819 PM PDT
AUGUST 17 2017........SUNRISE   609 AM PDT   SUNSET   817 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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