Climatological Report (Monthly) Issued by NWS
000
CXUS55 KRIW 012356
CLMCPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
533 PM MDT MON MAY 01 2023
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR CASPER FOR THE MONTH OF
APRIL 2023..
...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2023 WILL BE
AVAILABLE IN APPROXIMATELY 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 COLDER AND MUCH SNOWIER THAN NORMAL FOR CASPER...
THE IMPORTANT TOPIC FOR APRIL IS THE AMOUNT OF SNOW THAT FELL SO IT
IS LISTED FIRST. SNOWFALL FOR THE MONTH WAS 39.0 INCHES WHICH IS
28.5 INCHES ABOVE NORMAL AND MAKING IT TIED FOR 2ND SNOWIEST APRIL.
THE SNOWIEST DAY WAS ON THE 3RD WITH 26.7 INCHES. THIS CRUSHED THE
1981 RECORD OF 9.1 INCHES. IT ALSO SET AN ALL-TIME HIGH DAILY
SNOWFALL RECORD EXCEEDING THE DEC 24TH 1982 AMOUNT OF 24.3 INCHES.
THE 4TH ALSO HAD RECORD SNOW WITH 9.3 INCHES BREAKING 4.9 INCHES
FROM 2009. APRIL 3RD-4TH ALSO SAW THE BIGGEST SNOWSTORM EVER ON
RECORD WITH A TOTAL OF 37.4 INCHES. THIS BROKE THE PREVIOUS RECORD
OF 31.3 INCHES FROM DEC 23RD-24TH 1982.
THE AVERAGE TEMPERATURE FOR CASPER IN APRIL WAS 39.3 DEGREES WHICH
WAS 3 DEGREES BELOW NORMAL. THE WARMEST READING FOR THE MONTH WAS 72
DEGREES ON THE 12TH. THE COLDEST TEMPERATURE WAS 3 DEGREES ON THE
5TH...WHICH BROKE THE 1982 RECORD OF 7. NO OTHER TEMPERATURE RECORDS
WERE BROKEN.
PRECIPITATION FOR THE MONTH WAS 1.49 INCHES...WHICH IS 106 PERCENT
OF NORMAL THE WETTEST 24-HOUR PERIOD WAS ON THE 3RD WHEN 0.9 INCHES
FELL. THIS BROKE THE 1981 RECORD OF 0.73 INCHES. THE 4TH HAD 0.37
INCHES AND BROKE THE 1958 RECORD OF 0.29 INCHES. THE HIGHEST WIND
GUST WAS 70 MPH FROM THE NORTHWEST ON THE 27TH
...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2023...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2023
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 84 04/30/1992
LOW -6 04/12/1997
HIGHEST 72 04/12
LOWEST 3 04/05
AVG. MAXIMUM 51.7 56.3 -4.6
AVG. MINIMUM 26.9 28.2 -1.3
MEAN 39.3 42.3 -3.0
DAYS MAX >= 90 0
DAYS MAX <= 32 4
DAYS MIN <= 32 23
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 5.75 1941
MINIMUM 0.08 1992
TOTALS 1.49 1.41 0.08 1.98
DAILY AVG. 0.05 0.05 0.00
DAYS >= .01 9
DAYS >= .10 2
DAYS >= .50 1
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.90 04/03 TO 04/03
STORM TOTAL 0.90
SNOWFALL (INCHES)
TOTALS 39.0 10.5 28.5
SINCE 7/1 134.2 69.1 65.1
SNOWDEPTH AVG. 2
DAYS >= 1.0 4
DEGREE DAYS
HEATING TOTAL 762 682 80
SINCE 7/1 7643 6953 690
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 13.4
RESULTANT WIND SPEED/DIRECTION 7/240
HIGHEST WIND SPEED/DIRECTION 54/350 DATE 04/27
HIGHEST GUST SPEED/DIRECTION 70/350 DATE 04/27
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.34
NUMBER OF DAYS FAIR 20
NUMBER OF DAYS PC 4
NUMBER OF DAYS CLOUDY 6
AVERAGE RH (PERCENT) 59
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 0
LIGHT RAIN 3 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 2 SNOW 2
LIGHT SNOW 11 SLEET 0
FOG 10 FOG W/VIS <= 1/4 MILE 2
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO MAY 2023...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 60 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 32 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 73
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 42. THE AVERAGE MONTHLY
PRECIPITATION IS 2.21 INCHES. THE AVERAGE MONTHLY SNOWFALL IS 2.6
INCHES.
$$