Climatological Report (Monthly)
Issued by NWS Riverton, WY

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CXUS55 KRIW 031210
CLMRIW

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
610 AM MDT FRI MAY 3 2019

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON REGIONAL AIRPORT
FOR THE MONTH OF APRIL 2019...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2019 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 MUCH WETTER THAN NORMAL FOR RIVERTON...

THE AVERAGE TEMPERATURE FOR RIVERTON IN APRIL WAS 45.1 DEGREES...
WHICH WAS JUST 0.9 DEGREES ABOVE NORMAL. THE WARMEST READING OF THE
MONTH WAS 74 DEGREES ON THE 19TH...WHICH BROKE THE PREVIOUS RECORD
OF 72 SET IN 2010...AND ALSO ON THE 20TH...WHICH BROKE THE PREVIOUS
RECORD OF 73 DEGREES...SET IN 2012.  THE COLDEST READING WAS 21
DEGREES ON THE 29TH....WHICH TIED THE PREVIOUS RECORD OF 21 DEGREES
FROM 2017.

TOTAL PRECIPITATION FOR THE MONTH WAS 2.12 INCHES...WHICH WAS 163
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD WAS ON THE 9TH WHEN
0.57 INCHES FELL. TWO DAILY PRECIPITATION RECORDS WERE SET...0.51
INCHES ON THE 10TH BROKE 0.05 FROM 2011...AND 0.12 ON THE 11TH BROKE
0.06 FROM 2009.

SNOWFALL FOR APRIL WAS 7.9 INCHES. THE SNOWIEST 24 HOUR PERIOD WAS
ON THE 11TH WHEN 2.9 INCHES FELL...WHICH BROKE THE PREVIOUS DAILY
RECORD OF 0.3 INCHES FROM 2013.  TWO OTHER SNOWFALL RECORDS FELL.
THE 10TH HAD 2.2 INCHES...BREAKING 1.2 FROM 2011...AND THE 30TH WITH
2.8 INCHES...BREAKING 2.4 FROM 2008. THE HIGHEST WIND GUST WAS 47
MPH ON THE 6TH.

...THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2019...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1995 TO 2019

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              85   04/24/2012
 LOW                4   04/10/2013
                        04/11/1997
                        01/12/1963
HIGHEST            74   04/20
                        04/19
LOWEST             21   04/29
AVG. MAXIMUM     57.5              57.1     0.4
AVG. MINIMUM     32.8              31.3     1.5
MEAN             45.1              44.2     0.9
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     14
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.31   2016
 MINIMUM         0.10   2007
TOTALS           2.12              1.30    0.82
DAILY AVG.       0.07              0.04    0.03
DAYS >= .01         9
DAYS >= .10         6
DAYS >= .50         2
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.57   04/09 TO 04/09
 STORM TOTAL       MM
 (MM/DD(HH))

SNOWFALL (INCHES)
TOTALS            7.9                MM      MM
SINCE 7/1        42.1                MM      MM
SNOWDEPTH AVG.      0
DAYS >= 1.0         3

DEGREE_DAYS
HEATING TOTAL     589               624     -35
 SINCE 7/1       7864              7396     468
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.4
RESULTANT WIND SPEED/DIRECTION   3/328
HIGHEST WIND SPEED/DIRECTION    39/300    DATE  04/06
HIGHEST GUST SPEED/DIRECTION    47/320    DATE  04/06

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           17
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     58

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP                0
HEAVY RAIN                1     RAIN                        3
LIGHT RAIN                8     FREEZING RAIN               0
LT FREEZING RAIN          0     HAIL                        0
HEAVY SNOW                1     SNOW                        3
LIGHT SNOW                4     SLEET                       0
FOG                       9     FOG W/VIS <= 1/4 MILE       2
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 2019...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 62 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 36 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 72
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 45. THE AVERAGE MONTHLY
PRECIPITATION IS 1.72 INCHES.

$$


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