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000
CXUS55 KRIW 011957
CLMCPR

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

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE NATRONA COUNTY
INTERNATIONAL AIRPORT NEAR CASPER 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/...

...CASPER WAS RECORD COLDER AND WETTER THAN AVERAGE FOR APRIL...

THE AVERAGE TEMPERATURE FOR CASPER IN APRIL WAS 36.3 DEGREES...WHICH
WAS 6.4 DEGREES BELOW NORMAL. THIS MAKES APRIL 2013 THE 4TH COLDEST
IN THE PAST 73 YEARS OF WEATHER RECORD KEEPING. THE WARMEST DAILY
HIGH WAS 74 DEGREES WHICH OCCURRED ON THE 27TH OF THE MONTH...AND
THE COOLEST READING WAS 4 ABOVE WHICH OCCURRED ON THE 4TH AND THE
18TH. THERE WERE THREE NEW DAILY RECORD LOW TEMPERATURES SET IN APRIL...
4 ABOVE ON THE 9TH AND THE 18TH...AND 9 ABOVE ON THE 23RD.

TOTAL PRECIPITATION FOR THE MONTH WAS 2.54 INCHES...WHICH WAS 197
PERCENT OF NORMAL. THIS MAKES APRIL 2013 THE 6TH WETTEST IN THE PAST
73 YEARS OF WEATHER RECORD KEEPING. THE WETTEST DAY OF THE MONTH WAS
ON THE 8TH AND 9TH...WHEN 0.93 OF AN INCH OF PRECIPITATION FELL.
DURING THE MONTH...39.0 INCHES OF SNOW FELL...WHICH WAS 337 PERCENT
OF NORMAL...AND MADE APRIL THE 2ND SNOWIEST ON THE RECORD BOOKS. THE
HIGHEST WIND GUST WAS 52 MPH...WHICH OCCURRED ON THE 29TH.

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

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1939 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              84   04/30/1992
 LOW               -6   04/12/1997
HIGHEST            74   04/27
LOWEST              4   04/18
                        04/09
AVG. MAXIMUM     49.2              56.8    -7.6
AVG. MINIMUM     23.4              28.6    -5.2
MEAN             36.3              42.7    -6.4
DAYS MAX >= 90      0
DAYS MAX <= 32      6
DAYS MIN <= 32     25
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.75   1941
 MINIMUM         0.08   1992
TOTALS           2.54              1.29    1.25
DAILY AVG.       0.08              0.04    0.04
DAYS >= .01        11
DAYS >= .10         8
DAYS >= .50         2
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    7.10   04/16 TO 04/17

SNOWFALL (INCHES)
TOTALS           39.0              11.6    27.4
SINCE 7/1        82.2              71.9    10.3
DAYS >= 1.0         8

DEGREE_DAYS
HEATING TOTAL     852               669     183
 SINCE 7/1       6863              7042    -179
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              12.3
RESULTANT WIND SPEED/DIRECTION   3/274
HIGHEST WIND SPEED/DIRECTION    43/250    DATE  04/29
HIGHEST GUST SPEED/DIRECTION    52/250    DATE  04/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           15
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     59

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                2     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                3     SNOW                       6
LIGHT SNOW               13     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      5
HAZE                      8

-  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 62 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 33 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 72
DEGREES...AND THE AVERAGE LOW IS 41 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 2.02 INCHES...WITH 2.9 INCHES OF SNOWFALL.

$$