Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012355
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
555 PM MDT FRI MAY 1 2015

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

...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2015 WILL BE
AVAILABLE APPROXIMATELY IN JUNE 2015 FROM THE NATIONAL CLIMATIC
DATA CENTER (WWW.NCDC.NOAA.GOV). UNOFFICIAL ASOS DAILY SUMMARIES ARE
ONLINE AT WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW..

...APRIL WAS WARMER AND MUCH DRIER THAN AVERAGE IN GREYBULL...

THE AVERAGE TEMPERATURE FOR GREYBULL IN APRIL WAS 48.1 DEGREES...
WHICH WAS 1.6 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE
MONTH WAS 82 DEGREES ON THE 14TH. THE COLDEST READING WAS 20 DEGREES
ON THE 3RD.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.11 INCHES...WHICH WAS 15
PERCENT OF NORMAL. THIS WAS THE 3RD DRIEST APRIL ON RECORD SINCE
1999. THE WETTEST 24 HOUR PERIOD WAS ON THE 26TH AND 27TH WHEN 0.07
INCHES OF PRECIPITATION FELL. THE HIGHEST WIND GUST WAS 57 MPH FROM
THE NORTHWEST ON THE 15TH.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 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              88   04/23/2012
                        04/29/2007
 LOW                5   04/21/2008
HIGHEST            82   04/14
LOWEST             20   04/03
AVG. MAXIMUM     62.7              60.6     2.1
AVG. MINIMUM     33.6              32.3     1.3
MEAN             48.1              46.5     1.6
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     12
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         1.19   1999
 MINIMUM         0.10   2004
TOTALS           0.11              0.71   -0.60
DAILY AVG.       0.00              0.02   -0.02
DAYS >= .01         4
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.07   04/26 TO 04/27

DEGREE_DAYS
HEATING TOTAL     498               557     -59
 SINCE 7/1       6845              7399    -554
COOLING TOTAL       0                 1      -1
 SINCE 1/1          0                 1      -1
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.6
HIGHEST WIND SPEED/DIRECTION    46/330    DATE  04/15
HIGHEST GUST SPEED/DIRECTION    57/320    DATE  04/15

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           23
NUMBER OF DAYS PC              5
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     47

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                5     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                      1

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

LOOKING AHEAD TO MAY 2015...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 65 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 37 DEGREES. THE AVERAGE HIGH TEMPERATURE BY THE END OF THE MONTH
IS 74 DEGREES...AND THE AVERAGE LOW IS 48. MAY IS THE WETTEST MONTH
OF THE YEAR WITH AVERAGE MONTHLY PRECIPITATION OF 1.65 INCHES.

$$






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