Climatological Report (Daily)
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000
CDUS45 KRIW 180855
CLIGEY


CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
154 AM MST TUE DEC 18 2018


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

...THE GREYBULL WY CLIMATE SUMMARY FOR DECEMBER 17 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2018


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         44    327 PM  51    1998  28     16       28
  MINIMUM          9    747 AM -23    2016   6      3       14
  AVERAGE         27                        17     10       21

PRECIPITATION (IN)
  YESTERDAY        0.00          T    2012   0.01  -0.01      T
                                      2012
                                      2017
  MONTH TO DATE    T                         0.18  -0.18     0.19
  SINCE DEC 1      T                         0.18  -0.18     0.19
  SINCE JAN 1      6.19                      7.41  -1.22     4.38

DEGREE DAYS
 HEATING
  YESTERDAY       38                        48    -10       44
  MONTH TO DATE  750                       784    -34      627
  SINCE DEC 1    750                       784    -34      627
  SINCE JUL 1   2558                      2641    -83     2404

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    703                       669     34      824
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    10   HIGHEST WIND DIRECTION    NW (310)
  HIGHEST GUST SPEED    11   HIGHEST GUST DIRECTION    NW (310)
  AVERAGE WIND SPEED     2.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.1


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    96           900 AM
 LOWEST     41           300 PM
 AVERAGE    69

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


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 2018......SUNRISE   744 AM MST   SUNSET   434 PM MST
DECEMBER 19 2018......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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