Climatological Report (Monthly)
Issued by NWS
Issued by NWS
763
CXUS55 KRIW 031640
CLMP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1012 AM MDT FRI MAY 03 2024
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF APRIL 2024...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2024 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
...LAKE YELLOWSTONE WAS WARMER AND DRIER THAN NORMAL IN APRIL...
AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN APRIL WAS 30.7 DEGREES
WHICH IS 2 DEGREES ABOVE NORMAL. THERE WERE 7 DAYS OF MISSING DATA
IN APRIL SO MONTHLY AVERAGES MAY BE UNREPRESENTATIVE. THE WARMEST
READING OF THE MONTH WAS 57 DEGREES ON THE 13TH AND 14TH. THE 13TH
BROKE THE 2017 RECORD OF 56 AND THE 14TH BROKE THE 2015 RECORD OF
54. THE HIGH ON THE 2ND OF 49 TIED 2013. THE HIGH ON THE 3RD OF 51
BROKE THE 2016 RECORD OF 50. THE 4TH HIT 52 DEGREES AND TIED 2013.
THE HIGH OF 57 ON THE 24TH BROKE 52 DEGREES FROM 2005. THE COLDEST
READING OF THE MONTH WAS 6 BELOW ON THE 18TH. THE LOW ON THE 19TH
WAS 1 DEGREE...AND BROKE THE 2006 RECORD OF 5 DEGREES.
TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 1.02 INCHES... WHICH WAS
45 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH
WAS THE 15TH WHEN 0.38 INCHES OF PRECIPITATION FELL. NO
PRECIPITATION RECORDS WERE BROKEN. THE HIGHEST WIND GUST WAS 34 MPH
FROM THE SOUTHWEST ON THE 30TH.
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF APRIL
2024...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2024
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 65 04/29/2007
LOW -18 04/13/2022
HIGHEST 57 04/13
04/14
04/24
LOWEST -6 04/18
AVG. MAXIMUM 43.8 40.9 2.9
AVG. MINIMUM 17.5 16.6 0.9
MEAN 30.7 28.7 2.0
DAYS MAX >= 90 0
DAYS MAX <= 32 4
DAYS MIN <= 32 23
DAYS MIN <= 0 1
PRECIPITATION (INCHES)
RECORD
MAXIMUM 4.59 2011
MINIMUM 0.76 2008
TOTALS 1.02 2.28 -1.26 1.90
DAILY AVG. 0.04 0.08 -0.04
DAYS >= .01 10
DAYS >= .10 3
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.38 04/15 TO 04/15
STORM TOTAL 0.38
DEGREE DAYS
HEATING TOTAL 784 1088 -304
SINCE 7/1 9626 10651 -1025
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 2.3
RESULTANT WIND SPEED/DIRECTION 0/100
HIGHEST WIND SPEED/DIRECTION 17/280 DATE 04/22
HIGHEST GUST SPEED/DIRECTION 34/240 DATE 04/30
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.00
NUMBER OF DAYS FAIR 25
NUMBER OF DAYS PC 0
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 66
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 4 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 7 SLEET 0
FOG 0 FOG W/VIS <= 1/4 MILE 0
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO MAY 2024. THE AVERAGE HIGH TEMPERATURE ON THE FIRST
OF THE MONTH IS 46 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 21
DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 55 DEGREES AND
THE AVERAGE LOW TEMPERATURE IS 30 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 2.35 INCHES.
$$