Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 082219 CCA
CLMCPR

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
404 PM MDT TUE MAY 1 2018

..PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE NATRONA COUNTY
INTERNATIONAL AIRPORT NEAR CASPER FOR THE MONTH OF APRIL 2018...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2018 WILL BE
AVAILABLE APPROXIMATELY IN 60 DAYS FROM THE NATIONAL CENTERS FOR
ENVIRONMENTAL INFORMATION (HTTP://WWW.NCDC.NOAA.GOV/CDO-
WEB/DATASETS). UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE
INTERNET AT HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...APRIL WAS DRIER THAN NORMAL FOR CASPER...

THE AVERAGE TEMPERATURE FOR CASPER IN MARCH WAS 41.9 DEGREES. THIS
WAS ONLY 0.8 DEGREES BELOW NORMAL. THE WARMEST READING OF THE MONTH
WAS 80 DEGREES ON THE 28TH. THIS TIED THE PREVIOUS RECORD SET IN
2007. THE COLDEST READING WAS 5 DEGREES ON THE 3RD. ON THE 7TH...14
DEGREES TIES THE RECORD LOW PREVIOUSLY SET IN 2008.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.03 INCHES...WHICH WAS 80
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS ON
THE 30TH WHEN 0.4 INCHES OF PRECIPITATION FELL. SNOWFALL FOR APRIL
WAS 5.7 INCHES...WHICH IS 5.9 INCHES BELOW NORMAL...OR ONLY 49
PERCENT OF NORMAL. NO PRECIPITATION OR SNOW RECORDS WERE BROKEN THIS
MONTH. THE HIGHEST WIND GUST WAS 54 MPH ON THE 2ND.

...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1939 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              84   04/30/1992
 LOW               -6   04/12/1997
HIGHEST            80   04/28
LOWEST              5   04/03
AVG. MAXIMUM     58.7              56.8     1.9
AVG. MINIMUM     25.1              28.6    -3.5
MEAN             41.9              42.7    -0.8
DAYS MAX >= 90      0
DAYS MAX <= 32      1
DAYS MIN <= 32     23
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.75   1941
 MINIMUM         0.08   1992
TOTALS           1.03              1.29   -0.26
DAILY AVG.       0.03              0.04   -0.01
DAYS >= .01         8
DAYS >= .10         5
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.40   04/30 TO 04/30

SNOWFALL (INCHES)
TOTALS            5.7              11.6    -5.9
SINCE 7/1        71.7              71.9    -0.2
DAYS >= 1.0         3

DEGREE_DAYS
HEATING TOTAL     685               669      16
 SINCE 7/1       7056              7042      14
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              11.8
RESULTANT WIND SPEED/DIRECTION   2/273
HIGHEST WIND SPEED/DIRECTION    44/240    DATE  04/02
HIGHEST GUST SPEED/DIRECTION    54/230    DATE  04/02

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           16
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       3
LIGHT SNOW               10     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      1
HAZE                      3

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

LOOKING AHEAD TO MAY 2018...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. THE AVERAGE SNOWFALL IS 2.9 INCHES.

$$



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