Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012006
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
106 AM MST FRI DEC 1 2017

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE SOUTH BIG HORN COUNTY
AIRPORT NEAR GREYBULL FOR THE MONTH OF NOVEMBER 2017...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF NOVEMBER 2017 WILL BE
AVAILABLE APPROXIMATELY IN JANUARY 2018 FROM THE NATIONAL CENTER FOR
ENVIRONMENTAL INFORMATION (HTTP://WWW.NCEI.NOAA.GOV/OL/
CLIMATEDATA.HTML). UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON
THE INTERNET AT HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

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

THE AVERAGE TEMPERATURE FOR GREYBULL FOR THE MONTH WAS 33.7
DEGREES...WHICH WAS 3.2 DEGREE ABOVE NORMAL...MAKING IT THE 10TH
WARMEST NOVEMBER ON RECORD. THE WARMEST READING OF THE MONTH WAS 64
DEGREES ON THE 16TH. THIS BROKE THE PREVIOUS RECORD OF 62 DEGREES
SET IN 2001. A RECORD HIGH WAS ALSO BROKEN ON THE 24TH WITH 56
DEGREES BREAKING 54 DEGREES SET 1998. THE COLDEST READING WAS 10
DEGREES ON THE 7TH.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.21....WHICH WAS 70 PERCENT
OF NORMAL. THE WETTEST 24 HOUR PERIOD WAS THE 1ST...WHEN 0.12 INCHES
FELL. THIS BROKE THE PREVIOUS RECORD OF A TRACE...SET IN 2011. A
RECORD WAS ALSO SET ON THE 4TH WHEN 0.03 BROKE A TRACE SET IN 2008
AND ANOTHER ON THE 27TH WHEN A TRACE TIED A TRACE FROM 2005.  THE
HIGHEST WIND GUST WAS 45 MPH ON THE 27TH AND 29TH.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF NOVEMBER 2017...

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

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              73   11/01/2014
                        11/08/1999
                        11/06/1999
 LOW              -22   11/16/2014
HIGHEST            64   11/16
LOWEST             10   11/07
AVG. MAXIMUM     45.0              43.1     1.9
AVG. MINIMUM     22.3              17.9     4.4
MEAN             33.7              30.5     3.2
DAYS MAX >= 90      0
DAYS MAX <= 32      2
DAYS MIN <= 32     30
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         0.80   2002
 MINIMUM         0.00   2009
TOTALS           0.21              0.30   -0.09
DAILY AVG.       0.01              0.01    0.00
DAYS >= .01         6
DAYS >= .10         1
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.12   11/01 TO 11/01

DEGREE_DAYS
HEATING TOTAL     934              1035    -101
 SINCE 7/1       1777              1857     -80
COOLING TOTAL       0                 0       0
 SINCE 1/1        824               669     155
.................................................

WIND (MPH)
AVERAGE WIND SPEED              5.4
HIGHEST WIND SPEED/DIRECTION    38/330    DATE  11/27
HIGHEST GUST SPEED/DIRECTION    45/300    DATE  11/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           21
NUMBER OF DAYS PC              4
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                5     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      2
HAZE                      1

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

LOOKING AHEAD TO DECEMBER 2017...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 33 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 10 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 28
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 5 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.28 INCHES.  THE OFFICIAL START OF WINTER
BEGINS DECEMBER 21ST AT 0928 LOCAL TIME.

$$


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