Climatological Report (Monthly)
Issued by NWS

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000
CXUS55 KRIW 011935
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1235 PM MST THU JAN 1 2015

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE SOUTH BIG HORN COUNTY
AIRPORT NEAR GREYBULL FOR THE MONTH OF DECEMBER 2014...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 2014 WILL BE
AVAILABLE APPROXIMATELY IN FEBRUARY 2015 FROM THE NATIONAL CLIMATIC
DATA CENTER (HTTP://WWW.NCDC.NOAA.GOV/OL/CLIMATEDATA.HTML).
UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE INTERNET AT
HTTP://WWW.CRH.NOAA.GOV/RIW/CLIMATE/...

...GREYBULL WAS SLIGHTLY WARMER AND DRIER THAN NORMAL IN DECEMBER...

THE AVERAGE TEMPERATURE FOR GREYBULL IN DECEMBER WAS 18.2
DEGREES...WHICH WAS 0.5 DEGREES ABOVE NORMAL. THE WARMEST READING
FOR THE MONTH WAS 51 DEGREES ON THE 12TH...AND THE COLDEST READING
WAS 22 BELOW ON THE 31ST. THERE WERE THREE NEW RECORD HIGH READINGS
SET IN DECEMBER...WITH 51 DEGREES ON THE 12TH...50 DEGREES ON THE
13TH...AND 39 DEGREES TYING THE RECORD HIGH ON THE 21ST. THERE WERE
ALSO THREE NEW RECOLD LOW TEMPERATURES SET...WITH 21 BELOW ON THE
1ST... 17 BELOW ON THE 30TH...AND 20 BELOW ON THE 31ST.

THE TOTAL PRECIPITATION FOR THE MONTH WAS 0.21 OF AN INCH...WHICH
WAS 75 PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD WAS ON THE
25TH...WHEN 0.13 OF AN INCH OF PRECIPITATION FELL. THE HIGHEST WIND
GUST WAS 43 MPH...WHICH OCCURRED ON THE 14TH.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              63   12/11/2004
 LOW              -24   12/09/2009
HIGHEST            51   12/12
LOWEST            -22   12/31
AVG. MAXIMUM     28.1              29.1    -1.0
AVG. MINIMUM      8.4               6.3     2.1
MEAN             18.2              17.7     0.5
DAYS MAX >= 90      0
DAYS MAX <= 32     20
DAYS MIN <= 32     30
DAYS MIN <= 0       8

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         0.49   1999
 MINIMUM         0.02   1998
TOTALS           0.21              0.28   -0.07
DAILY AVG.       0.01              0.01    0.00
DAYS >= .01         5
DAYS >= .10         1
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.13   12/25 TO 12/25

DEGREE_DAYS
HEATING TOTAL    1442              1466     -24
 SINCE 7/1       3275              3323     -48
COOLING TOTAL       0                 0       0
 SINCE 1/1        698               669      29
.................................................

WIND (MPH)
AVERAGE WIND SPEED              5.3
HIGHEST WIND SPEED/DIRECTION    36/320    DATE  12/14
HIGHEST GUST SPEED/DIRECTION    43/320    DATE  12/14

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           15
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     81

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                3     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW               10     SLEET                      0
FOG                      19     FOG W/VIS <= 1/4 MILE      3
HAZE                      6

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

LOOKING AHEAD TO JANUARY 2015...THE AVERAGE HIGH TEMPERATURE ON
THE FIRST OF THE MONTH IS 28 DEGREES...AND THE AVERAGE LOW
TEMPERATURE IS 4 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH
IS 30 DEGREES...AND THE AVERAGE LOW IS 6 ABOVE. THE AVERAGE MONTHLY
PRECIPITATION IS 0.23 INCHES.

$$




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