Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 082232 CCA
CLMRKS

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
111 PM MDT WED MAY 2 2018

..PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE SOUTHWEST WYOMING
REGIONAL AIRPORT NEAR ROCK SPRINGS 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 MUCH DRIER THAN NORMAL IN ROCK SPRINGS...

THE AVERAGE TEMPERATURE FOR ROCK SPRINGS IN APRIL WAS 42.6
DEGREES...WHICH WAS 1 DEGREE ABOVE NORMAL. THE WARMEST READING OF
THE MONTH WAS 75 DEGREES ON THE 28TH...AND THE COLDEST WAS 13
DEGREES ON THE 3RD. NO TEMPERATURE RECORDS WERE SET THIS MONTH.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.16 INCHES. WHICH IS 18
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD WAS THE 6TH...WHEN
0.11 INCHES FELL. THIS MAKES IT THE 6TH DRIEST APRIL ON RECORD. NO
PRECIPITATION RECORDS WERE SET DURING THE MONTH. THE HIGHEST WIND
GUST WAS 61 MPH ON THE 28TH.

...THE ROCK SPRINGS WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1948 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              79   04/23/2012
                        04/29/2007
                        04/20/1989
 LOW                2   04/02/1975
HIGHEST            75   04/28
LOWEST             13   04/03
AVG. MAXIMUM     56.2              53.7     2.5
AVG. MINIMUM     29.0              29.4    -0.4
MEAN             42.6              41.6     1.0
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     22
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.74   1999
 MINIMUM            T   2013
TOTALS           0.16              0.91   -0.75
DAILY AVG.       0.01              0.03   -0.02
DAYS >= .01         4
DAYS >= .10         1
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.11   04/06 TO 04/06

DEGREE_DAYS
HEATING TOTAL     663               703     -40
 SINCE 7/1       6850              7532    -682
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              14.1
RESULTANT WIND SPEED/DIRECTION   7/256
HIGHEST WIND SPEED/DIRECTION    51/210    DATE  04/28
HIGHEST GUST SPEED/DIRECTION    61/210    DATE  04/28

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     48

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                5     SLEET                      0
FOG                       6     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 2018...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 59 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 33 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 69
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 42 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 1.21 INCHES.

$$


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