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000
CXUS55 KRIW 012013
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
211 PM MDT WED MAY 1 2013

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE SOUTH BIG HORN COUNTY
AIRPORT NEAR GREYBULL FOR THE MONTH OF APRIL 2013...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2013 WILL BE AVAILABLE
APPROXIMATELY IN JUNE 2013 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 DRIER AND COLDER THAN NORMAL IN APRIL...

THE AVERAGE TEMPERATURE FOR GREYBULL IN APRIL WAS 42.1 DEGREES...
WHICH WAS 4.4 DEGREES BELOW NORMAL. THE WARMEST DAILY HIGH FOR THE
MONTH WAS 77 DEGREES ON THE 27TH. THE COLDEST READING WAS 14 DEGREES
ON THE 10TH...18TH AND THE 23RD. FOUR DAILY LOW TEMPERATURE RECORDS
WERE SET DURING APRIL...17 DEGREES ON THE 9TH...AND 14 DEGREES ON
THE 10TH...18TH AND 23RD.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.38 INCHES...WHICH WAS 54
PERCENT OF NORMAL. THE WETTEST PERIOD OF THE MONTH WAS BETWEEN THE
20TH AND 22ND WHEN 0.15 OF AN INCH OF PRECIPITATION FELL. THE
HIGHEST WIND GUST WAS 54 MPH...WHICH OCCURRED ON THE 29TH.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              88   04/23/2012
                        04/29/2007
 LOW                5   04/21/2008
HIGHEST            77   04/27
LOWEST             14   04/23
                        04/18
                        04/10
AVG. MAXIMUM     54.8              60.6    -5.8
AVG. MINIMUM     29.4              32.3    -2.9
MEAN             42.1              46.5    -4.4
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     18
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         1.19   1999
 MINIMUM         0.10   2004
TOTALS           0.38              0.71   -0.33
DAILY AVG.       0.01              0.02   -0.01
DAYS >= .01         7
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.11   04/20 TO 04/21
                        04/21 TO 04/22

DEGREE_DAYS
HEATING TOTAL     678               557     121
 SINCE 7/1       7410              7399      11
COOLING TOTAL       0                 1      -1
 SINCE 1/1          0                 1      -1

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

WIND (MPH)
AVERAGE WIND SPEED              8.6
HIGHEST WIND SPEED/DIRECTION    43/340    DATE  04/29
HIGHEST GUST SPEED/DIRECTION    54/340    DATE  04/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     52

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                5     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       4
LIGHT SNOW                9     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      1
HAZE                      5

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

LOOKING AHEAD TO MAY 2013...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 66 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 38 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 75
DEGREES...AND THE AVERAGE LOW IS 48. THE AVERAGE MONTHLY
PRECIPITATION IS 1.65 INCHES.

$$