Climatological Report (Daily)
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000
CDUS45 KRIW 180741
CLIGEY


CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1241 AM MST MON DEC 18 2017


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

...THE GREYBULL WY CLIMATE SUMMARY FOR DECEMBER 17 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         28    320 PM  51    1998  28      0       -2
  MINIMUM         14   1159 PM -23    2016   6      8      -23
  AVERAGE         21                        17      4      -12

PRECIPITATION (IN)
  YESTERDAY        T   R         T    2012   0.01  -0.01      T
                                      2012
                                      2016
  MONTH TO DATE    0.19                      0.18   0.01     0.03
  SINCE DEC 1      0.19                      0.18   0.01     0.03
  SINCE JAN 1      4.38                      7.41  -3.03     7.08

DEGREE DAYS
 HEATING
  YESTERDAY       44                        48     -4       77
  MONTH TO DATE  627                       784   -157      832
  SINCE DEC 1    627                       784   -157      832
  SINCE JUL 1   2404                      2641   -237     2207

 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     9   HIGHEST WIND DIRECTION     W (290)
  HIGHEST GUST SPEED    13   HIGHEST GUST DIRECTION     E (100)
  AVERAGE WIND SPEED     3.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.4


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1200 AM
 LOWEST     85           300 PM
 AVERAGE    93

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


THE GREYBULL WY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   28        48      1999
 MINIMUM TEMPERATURE (F)    6       -25      2016


SUNRISE AND SUNSET
DECEMBER 18 2017......SUNRISE   744 AM MST   SUNSET   434 PM MST
DECEMBER 19 2017......SUNRISE   745 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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