Climatological Report (Daily)
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174
CDUS46 KSEW 210838
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1238 AM PST WED FEB 21 2018


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR FEBRUARY 20 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2018


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         36    256 PM  62    1977  50    -14       45
  MINIMUM         27   1108 PM  25    1955  37    -10       40
  AVERAGE         32                        44    -12       43

PRECIPITATION (IN)
  YESTERDAY        T             0.74 1984   0.12  -0.12     0.20
                                      1948
  MONTH TO DATE    1.65                      2.53  -0.88     8.26
  SINCE OCT 1     28.63                     23.50   5.13    32.88
  SINCE JAN 1      9.77                      8.10   1.67    12.48

SNOWFALL (IN)
  YESTERDAY        0.0           1.4  1993                   0.0
  MONTH TO DATE    T                                         7.1
  SINCE OCT 1      3.0                                      11.1
  SINCE JUL 1      3.0                                      11.1
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       33                        21     12       22
  MONTH TO DATE  438                       438      0      453
  SINCE DEC 1   1822                      1904    -82     2119
  SINCE JUL 1   2811                      3087   -276     2970

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1      0                         0      0        0
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   4   RESULTANT WIND DIRECTION   E (90)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION     N (10)
  HIGHEST GUST SPEED    18   HIGHEST GUST DIRECTION     N (10)
  AVERAGE WIND SPEED     6.9


SKY COVER
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    69           500 AM
 LOWEST     59           900 AM
 AVERAGE    64

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   51        67      1973
 MINIMUM TEMPERATURE (F)   37        25      1957


SUNRISE AND SUNSET
FEBRUARY 21 2018......SUNRISE   704 AM PST   SUNSET   542 PM PST
FEBRUARY 22 2018......SUNRISE   702 AM PST   SUNSET   544 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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