Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 010925
CLMCPR

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
201 AM MDT MON JUN 1 2015

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE CASPER-NATRONA COUNTY
INTERNATIONAL AIRPORT NEAR CASPER FOR THE MONTH OF MAY 2015...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2015 WILL BE
AVAILABLE APPROXIMATELY IN JULY 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...

...CASPER WAS MUCH COLDER THAN NORMAL AND MUCH WETTER THAN AVERAGE FOR
MAY...

THE AVERAGE TEMPERATURE FOR CASPER IN MAY WAS 49.1 DEGREES...WHICH
WAS 3.1 DEGREE BELOW NORMAL. THE WARMEST READING FOR THE MONTH WAS
79 DEGREES ON THE 31ST. THE COLDEST READING FOR THE MONTH WAS 27
DEGREES ON THE 1ST AND THE 11TH. A NEW DAILY RECORD FOR THE COOLEST
HIGH TEMPERATURE OF 40 DEGREES WAS SET ON THE 10TH...OTHERWISE NO
OTHER TEMPERATURE RECORDS WERE SET DURING THE MONTH.

TOTAL PRECIPITATION FOR THE MONTH WAS 3.89 INCHES...WHICH WAS 192
PERCENT OF NORMAL. THIS MAKES IT THE 7TH WETTEST MAY ON RECORD..WITH
THE WETTEST MAY COMING IN 1978 WHEN 6.46 INCHES OF PRECIPITATION
FELL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS FROM THE 23RD TO
THE 24TH WHEN 1.13 INCHES OF PRECIPITATION FELL. TOTAL SNOWFALL FOR
THE MONTH WAS 6.3 INCHES...WHICH WAS 217 PERCENT OF NORMAL. A DAILY
SNOWFALL RECORD OF 3.3 INCHES OCCURRED ON THE 9TH. NO OTHER
PRECIPITATION OR SNOWFALL RECORDS OCCURRED DURING THE MONTH. THE
HIGHEST WIND GUST WAS 43 MPH ON THE 3RD.

...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1939 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              95   05/29/2003
 LOW               16   05/12/1953
HIGHEST            79   05/31
LOWEST             27   05/11
                        05/01
AVG. MAXIMUM     61.1              67.1    -6.0
AVG. MINIMUM     37.2              37.2     0.0
MEAN             49.1              52.2    -3.1
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      7
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.46   1978
 MINIMUM         0.30   1966
TOTALS           3.89              2.02    1.87
DAILY AVG.       0.13              0.07    0.06
DAYS >= .01        18
DAYS >= .10         9
DAYS >= .50         2
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    1.13   05/23 TO 05/24

SNOWFALL (INCHES)
TOTALS            6.3               2.9     3.4
SINCE 7/1        71.7              74.8    -3.1
DAYS >= 1.0         2

DEGREE_DAYS
HEATING TOTAL     486               402      84
 SINCE 7/1       6938              7444    -506
COOLING TOTAL       0                 4      -4
 SINCE 1/1          0                 4      -4
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.6
RESULTANT WIND SPEED/DIRECTION   2/043
HIGHEST WIND SPEED/DIRECTION    33/220    DATE  05/02
HIGHEST GUST SPEED/DIRECTION    43/190    DATE  05/03

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR           11
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY         12

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              7     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       8
LIGHT RAIN               19     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                4     SLEET                      0
FOG                      17     FOG W/VIS <= 1/4 MILE      4
HAZE                      2

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

LOOKING AHEAD TO JUNE 2015...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 71...AND THE AVERAGE LOW TEMPERATURE IS 43.
THE AVERAGE HIGH BY THE END OF THE MONTH IS 85 DEGREES...AND THE
AVERAGE LOW IS 51. THE AVERAGE MONTHLY PRECIPITATION IS 1.61 INCHES.
THE AVERAGE MONTHLY SNOWFALL IS 0.1 INCHES.

$$










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