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CLMCPR

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CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
233 AM MDT SUN JUN 2 2013

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE NATRONA COUNTY
INTERNATIONAL AIRPORT NEAR CASPER FOR THE MONTH OF MAY 2013...

..OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2013 WILL BE
AVAILABLE APPROXIMATELY IN JULY 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 SLIGHTLY WARMER AND SLIGHTLY DRIER THAN AVERAGE FOR
MAY...

THE AVERAGE TEMPERATURE FOR CASPER IN MAY WAS 54.2 DEGREES...WHICH
WAS 2.0 DEGREES ABOVE NORMAL. THE WARMEST DAILY HIGH WAS 88
DEGREES...WHICH OCCURRED ON THE 13TH AND 14TH OF THE MONTH. BOTH SET
NEW RECORD HIGHS...BREAKING THE PREVIOUS RECORDS OF 87 AND 85
DEGREES...SET BACK IN 2001 AND 1976...RESPECTIVELY. THE COOLEST
READING WAS 21...WHICH OCCURRED ON THE 2ND.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.81 INCHES...WHICH WAS 90
PERCENT OF NORMAL. THE WETTEST DAY OF THE MONTH WAS ON THE
19TH...WHEN 1.24 OF AN INCH OF PRECIPITATION FELL. THIS ALSO SET A
NEW RECORD...BREAKING THE PREVIOUS RECORD OF 0.85 SET IN 1975.
DURING THE MONTH...3.5 INCHES OF SNOW FELL...WHICH ALL FELL ON THE
1ST. THIS SET A NEW RECORD...BREAKING THE PREVIOUS RECORD OF 3
INCHES SET IN 1988. THIS 3.5 INCHES WAS 0.6 INCHES ABOVE NORMAL. THE
HIGHEST WIND GUST WAS 47 MPH...WHICH OCCURRED ON THE 30TH.

...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF MAY 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              95   05/29/2003
 LOW               16   05/12/1953
HIGHEST            88   05/14
                        05/13
LOWEST             21   05/02
AVG. MAXIMUM     69.5              67.1     2.4
AVG. MINIMUM     39.0              37.2     1.8
MEAN             54.2              52.2     2.0
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      6
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.46   1978
 MINIMUM         0.30   1966
TOTALS           1.81              2.02   -0.21
DAILY AVG.       0.06              0.07   -0.01
DAYS >= .01         7
DAYS >= .10         3
DAYS >= .50         1
DAYS >= 1.00        1
GREATEST
 24 HR. TOTAL    1.24   05/19 TO 05/19

SNOWFALL (INCHES)
TOTALS            3.5               2.9     0.6
SINCE 7/1        85.7              74.8    10.9
DAYS >= 1.0         1

DEGREE_DAYS
HEATING TOTAL     336               402     -66
 SINCE 7/1       7199              7444    -245
COOLING TOTAL      10                 4       6
 SINCE 1/1         10                 4       6
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.4
RESULTANT WIND SPEED/DIRECTION   2/274
HIGHEST WIND SPEED/DIRECTION    37/270    DATE  05/27
HIGHEST GUST SPEED/DIRECTION    47/300    DATE  05/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           23
NUMBER OF DAYS PC              3
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     52

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       2
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                1     SLEET                      0
FOG                       7     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

LOOKING AHEAD TO JUNE 2013...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 72 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 43 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 85
DEGREES...AND THE AVERAGE LOW IS 51 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 1.37 INCHES.

$$