Climatological Report (Daily)
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855
CDUS45 KRIW 170753
CLIGEY


CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1250 AM MST SUN DEC 17 2017


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

...THE GREYBULL WY CLIMATE SUMMARY FOR DECEMBER 16 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         33    128 PM  45    1998  28      5       12
  MINIMUM         26    110 AM -16    2008   6     20       -5
  AVERAGE         30                        17     13        4

PRECIPITATION (IN)
  YESTERDAY        0.19R         T    2005   0.01   0.18     0.02
                                      2005
                                      2015
  MONTH TO DATE    0.19                      0.17   0.02     0.03
  SINCE DEC 1      0.19                      0.17   0.02     0.03
  SINCE JAN 1      4.38                      7.40  -3.02     7.08

DEGREE DAYS
 HEATING
  YESTERDAY       35                        48    -13       61
  MONTH TO DATE  583                       736   -153      755
  SINCE DEC 1    583                       736   -153      755
  SINCE JUL 1   2360                      2593   -233     2130

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    824                       669    155      887
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    25   HIGHEST WIND DIRECTION    NW (330)
  HIGHEST GUST SPEED    37   HIGHEST GUST DIRECTION    NW (330)
  AVERAGE WIND SPEED     6.6


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.9


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           900 AM
 LOWEST     63           100 AM
 AVERAGE    82

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


THE GREYBULL WY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   28        51      1998
 MINIMUM TEMPERATURE (F)    6       -23      2016


SUNRISE AND SUNSET
DECEMBER 17 2017......SUNRISE   743 AM MST   SUNSET   434 PM MST
DECEMBER 18 2017......SUNRISE   744 AM MST   SUNSET   434 PM MST


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




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