Climatological Report (Daily)
Issued by NWS Grand Rapids, MI

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CDUS43 KGRR 151425
CLIGRR


CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
925 AM EST FRI DEC 15 2017


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

...THE GRAND RAPIDS MI CLIMATE SUMMARY FOR DECEMBER 15 2017...
VALID AS OF 0900 AM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1892 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         23    758 AM  60    1971  35    -12       16
  MINIMUM         19    113 AM  -7    1917  24     -5        4
  AVERAGE         21                        29     -8       10

PRECIPITATION (IN)
  TODAY            0.01          2.25 1893   0.08  -0.07     0.08
  MONTH TO DATE    0.81                      1.29  -0.48     1.87
  SINCE DEC 1      0.81                      1.29  -0.48     1.87
  SINCE JAN 1     38.28                     37.06   1.22    45.20

SNOWFALL (IN)
  TODAY            T             6.7  1987   0.7   -0.7      1.7
  MONTH TO DATE   11.7                       9.4    2.3     28.8
  SINCE DEC 1     11.7                       9.4    2.3     28.8
  SINCE JUL 1     12.3                      16.7   -4.4     29.6
  SNOW DEPTH       6

DEGREE DAYS
 HEATING
  TODAY           44                        36      8       55
  MONTH TO DATE  526                       504     22      556
  SINCE DEC 1    526                       504     22      556
  SINCE JUL 1   1717                      1842   -125     1504

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    719                       699     20      936
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED  10   RESULTANT WIND DIRECTION   S (190)
  HIGHEST WIND SPEED    18   HIGHEST WIND DIRECTION     S (200)
  HIGHEST GUST SPEED    23   HIGHEST GUST DIRECTION     S (200)
  AVERAGE WIND SPEED    10.2


SKY COVER
  AVERAGE SKY COVER 1.0


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  HEAVY SNOW
  SNOW
  LIGHT SNOW
  FOG
  FOG W/VISIBILITY <= 1/4 MILE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    92           900 AM
 LOWEST     74           700 AM
 AVERAGE    83

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


THE GRAND RAPIDS MI CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   34        61      1984
 MINIMUM TEMPERATURE (F)   23        -2      1989
                                             1901


SUNRISE AND SUNSET
DECEMBER 15 2017......SUNRISE   806 AM EST   SUNSET   509 PM EST
DECEMBER 16 2017......SUNRISE   807 AM EST   SUNSET   509 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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