Climatological Report (Monthly)
Issued by NWS

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293
CXUS55 KRIW 011121
CLMCPR

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
335 AM MDT MON MAY 1 2017

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

...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2017 WILL BE
AVAILABLE APPROXIMATELY IN JUNE 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 WETTER THAN NORMAL IN APRIL...

THE AVERAGE TEMPERATURE FOR CASPER IN APRIL WAS 43.0 DEGREES...WHICH
WAS 0.3 DEGREES ABOVE NORMAL. THE WARMEST READING OF THE MONTH WAS
79 DEGREES ON THE 13TH...SETTING A NEW RECORD HIGH. THIS BROKE THE
PREVIOUS RECORD OF 76 DEGREES...SET IN 2000. THE COLDEST READING OF
THE MONTH WAS 19 DEGREES ON THE 10TH.

TOTAL PRECIPITATION FOR THE MONTH WAS 2.21 INCHES...WHICH WAS 171
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE 2
1ST...WHEN 0.48 INCHES OF PRECIPITATION FELL. NO PRECIPITATION
RECORDS WERE SET DURING THE MONTH. TOTAL SNOWFALL FOR THE MONTH WAS
5.8 INCHES...WHICH WAS 50 PERCENT OF NORMAL. NO SNOWFALL RECORDS
WERE SET DURING THE MONTH. THE HIGHEST WIND GUST WAS 56 MPH ON THE
23RD.

...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 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              84   04/30/1992
 LOW               -6   04/12/1997
HIGHEST            79   04/13
LOWEST             19   04/10
AVG. MAXIMUM     56.0              56.8    -0.8
AVG. MINIMUM     29.9              28.6     1.3
MEAN             43.0              42.7     0.3
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     22
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.75   1941
 MINIMUM         0.08   1992
TOTALS           2.21              1.29    0.92
DAILY AVG.       0.07              0.04    0.03
DAYS >= .01        14
DAYS >= .10         8
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.48   04/21 TO 04/21

SNOWFALL (INCHES)
TOTALS            5.8              11.6    -5.8
SINCE 7/1        67.1              71.9    -4.8
DAYS >= 1.0         3

DEGREE_DAYS
HEATING TOTAL     653               669     -16
 SINCE 7/1       6555              7042    -487
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              11.2
RESULTANT WIND SPEED/DIRECTION   5/250
HIGHEST WIND SPEED/DIRECTION    41/210    DATE  04/09
HIGHEST GUST SPEED/DIRECTION    56/260    DATE  04/23

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           16
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          8

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       3
LIGHT SNOW                9     SLEET                      0
FOG                      14     FOG W/VIS <= 1/4 MILE      5
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 2017...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 TEMPERATURE IS 41. THE AVERAGE MONTHLY
PRECIPITATION IS 2.02 INCHES.

$$



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