Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 140543
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1240 AM EST THU DEC 14 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 13 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         37   1158 PM  71    2015  47    -10       47
                                      1889
  MINIMUM         23    800 AM  11    1960  33    -10       40
  AVERAGE         30                        40    -10       44

PRECIPITATION (IN)
  YESTERDAY        T             2.43 1909   0.09  -0.09     0.00
  MONTH TO DATE    0.28                      1.39  -1.11     1.56
  SINCE DEC 1      0.28                      1.39  -1.11     1.56
  SINCE JAN 1     35.38                     38.08  -2.70    30.65

SNOWFALL (IN)
  YESTERDAY        T             6.7  1966   0.1   -0.1
  MONTH TO DATE    2.0                       0.8    1.2
  SINCE JUL 1      2.0                       1.3    0.7
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       35                        25     10       21
  MONTH TO DATE  287                       299    -12      273
  SINCE DEC 1    287                       299    -12      273
  SINCE JUL 1    836                       994   -158      760

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1   1826                      1549    277     1994
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    29   HIGHEST WIND DIRECTION    NW (300)
  HIGHEST GUST SPEED    37   HIGHEST GUST DIRECTION    NW (300)
  AVERAGE WIND SPEED    15.1


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    44          1100 PM
 LOWEST     29           300 PM
 AVERAGE    37

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


THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   47        70      1931
                                             1929
                                             1881
 MINIMUM TEMPERATURE (F)   33         6      1904


SUNRISE AND SUNSET
DECEMBER 14 2017......SUNRISE   719 AM EST   SUNSET   447 PM EST
DECEMBER 15 2017......SUNRISE   720 AM EST   SUNSET   447 PM EST


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




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