Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012027
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
125 PM MDT TUE SEP 1 2015

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE SOUTH BIG HORN COUNTY
AIRPORT NEAR GREYBULL FOR THE MONTH OF AUGUST 2015...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF AUGUST 2015 WILL BE
AVAILABLE APPROXIMATELY IN OCTOBER 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.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...GREYBULL AS SLIGHTLY COOLER THAN NORMAL WITH BELOW AVERAGE
PRECIPITATION IN AUGUST...

THE AVERAGE TEMPERATURE FOR GREYBULL IN AUGUST WAS 71.6
DEGREES...WHICH WAS 0.4 DEGREES BELOW NORMAL. THE WARMEST READING OF
THE MONTH WAS 101 DEGREES ON THE 14TH AND 15TH. A RECORD HIGH WAS
SET ON THE 15TH...BREAKING THE PREVIOUS RECORD HIGH OF 96 DEGREES
SET IN 2007. THE COLDEST READING OF THE MONTH WAS 38 DEGREES ON THE
23RD..SETTING A NEW RECORD. THIS BROKE THE PREVIOUS RECORD OF 45
DEGREES...SET IN 2008. ANOTHER RECORD LOW OF 41 DEGREES WAS SET ON
THE 19TH...BREAKING THE PREVIOUS RECORD OF 45 DEGREES...SET IN 2012.
ANOTHER RECORD LOW OF 46 DEGREES WAS SET ON THE 20TH...BREAKING THE
PREVIOUS RECORD LOW OF 50 DEGREES SET IN 2009. ANOTHER RECORD LOW OF
46 DEGREES WAS SET ON THE 22ND...BREAKING THE PREVIOUS RECORD LOW OF
53 DEGREES SET IN 2009. ANOTHER RECORD LOW OF 43 DEGREES WAS SET ON
THE 24TH...BREAKING THE PREVIOUS RECORD LOW OF 44 DEGREES SET IN
2010.


TOTAL PRECIPITATION FOR THE MONTH WAS 0.09 INCHES...WHICH WAS 21
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD WAS ON THE 17TH AND
18TH WHEN 0.08 INCHES FELL. A RECORD 0.01 INCHES FELL ON THE
27TH...BREAKING THE OLD RECORD OF A TRACE LAST SET IN 2013. THE
HIGHEST WIND GUST WAS 59 MPH ON THE 22ND.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH             105   08/03/2001
 LOW               36   08/31/2005
HIGHEST           101   08/15
                        08/14
LOWEST             38   08/23
AVG. MAXIMUM     88.6              89.1    -0.5
AVG. MINIMUM     54.6              54.8    -0.2
MEAN             71.6              72.0    -0.4
DAYS MAX >= 90     14
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         1.01   2014
 MINIMUM            T   2013
TOTALS           0.09              0.42   -0.33
DAILY AVG.       0.00              0.01   -0.01
DAYS >= .01         3
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.08   08/17 TO 08/18

DEGREE_DAYS
HEATING TOTAL      25                15      10
 SINCE 7/1         28                21       7
COOLING TOTAL     237               230       7
 SINCE 1/1        749               633     116
.................................................

WIND (MPH)
AVERAGE WIND SPEED              6.8
HIGHEST WIND SPEED/DIRECTION    48/330    DATE  08/22
HIGHEST GUST SPEED/DIRECTION    59/340    DATE  08/22

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.10
NUMBER OF DAYS FAIR           30
NUMBER OF DAYS PC              1
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     42

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                6     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       2     FOG W/VIS <= 1/4 MILE      0
HAZE                      6

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

LOOKING AHEAD TO SEPTEMBER 2015...THE AVERAGE HIGH TEMPERATURE ON
THE FIRST OF THE MONTH IS 84 DEGREES...AND THE AVERAGE LOW
TEMPERATURE IS 50 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH
IS 67 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 37 DEGREES. THE
AVERAGE MONTHLY PRECIPITATION IS 0.88 INCHES.


$$


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