Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 020903 AAA
CLMCPR

CLIMATE REPORT...AMENDED
NATIONAL WEATHER SERVICE RIVERTON WY
359 PM MDT THU JUN 1 2017

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE NATRONA COUNTY
INTERNATIONAL AIRPORT NEAR CASPER FOR THE MONTH OF MAY 2017...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2017 WILL BE
AVAILABLE APPROXIMATELY IN JULY 2017 FROM THE NATIONAL CENTER FOR
ENVIRONMENTAL INFORMATION HTTP://WWW.NCEI.NOAA.GOV/OL/
CLIMATEDATA.HTML). UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON
THE INTERNET AT HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...CASPER WAS SLIGHTLY WETTER THAN NORMAL IN MAY...

THE AVERAGE TEMPERATURE FOR CASPER IN MAY WAS 52.0 DEGREES...WHICH
WAS 0.2 DEGREES BELOW NORMAL. THE WARMEST READING OF THE MONTH WAS
85 DEGREES ON THE 6TH. THE COLDEST READING OF THE MONTH WAS 28
DEGREES ON THE 20TH. NO TEMPERATURE RECORD WERE SET DURING THE MONTH.

TOTAL PRECIPITATION FOR THE MONTH WAS 2.25 INCHES...WHICH WAS 111
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS ON
THE 18TH...WHEN 1.06 INCHES OF PRECIPITATION FELL. NO PRECIPITATION
RECORDS WERE SET DURING THE MONTH. TOTAL SNOWFALL FOR THE MONTH WAS
2.9 INCHES. NO SNOWFALL RECORDS WERE SET DURING THE MONTH. THE
HIGHEST WIND GUST WAS 49 MPH ON THE 24TH.

...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1939 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              95   05/29/2003
 LOW               16   05/12/1953
HIGHEST            85   05/06
LOWEST             28   05/20
AVG. MAXIMUM     66.4              67.1    -0.7
AVG. MINIMUM     37.6              37.2     0.4
MEAN             52.0              52.2    -0.2
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           2.25              2.02    0.23
DAILY AVG.       0.07              0.07    0.00
DAYS >= .01        11
DAYS >= .10         7
DAYS >= .50         1
DAYS >= 1.00        1
GREATEST
 24 HR. TOTAL    1.06   05/18 TO 05/18

SNOWFALL (INCHES)
TOTALS            2.9               2.9     0.0
SINCE 7/1        70.0              74.8    -4.8
DAYS >= 1.0         1

DEGREE_DAYS
HEATING TOTAL     396               402      -6
 SINCE 7/1       6951              7444    -493
COOLING TOTAL       0                 4      -4
 SINCE 1/1          0                 4      -4
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.2
RESULTANT WIND SPEED/DIRECTION   1/276
HIGHEST WIND SPEED/DIRECTION    37/250    DATE  05/24
HIGHEST GUST SPEED/DIRECTION    49/270    DATE  05/24

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           15
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       5
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                2     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      3
HAZE                      1

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

LOOKING AHEAD TO JUNE 2017...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 73 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 42 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 85
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 50. THE AVERAGE MONTHLY
PRECIPITATION IS 1.61 INCHES.

$$



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