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000
CXUS55 KRIW 040921 CCA
CLMRKS

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
315 PM MDT WED MAY 1 2013

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR SWEETWATER COUNTY AIRPORT
NEAR ROCK SPRINGS FOR THE MONTH OF APRIL 2013...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2013 WILL BE
AVAILABLE APPROXIMATELY IN JUNE 2013 FROM THE NATIONAL CLIMATIC
DATA CENTER (HTTP://WWW.NCDC.NOAA.GOV/OL/CLIMATEDATA.HTML).
UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE INTERNET AT
HTTP://WWW.CRH.NOAA.GOV/RIW/CLIMATE/...

...ROCK SPRINGS WAS COLDER AND DRIER THAN NORMAL IN APRIL...

THE AVERAGE TEMPERATURE FOR ROCK SPRINGS IN APRIL WAS 37.5
DEGREES...WHICH WAS 4.1 DEGREES BELOW NORMAL. THE WARMEST DAILY HIGH
FOR THE MONTH WAS 70 DEGREES ON THE 27TH AND THE 28TH. THE COOLEST
READING FOR THE MONTH WAS 6 ABOVE ON THE 10TH. SIX NEW DAILY RECORD
LOW TEMPERATURES WERE SET DURING APRIL...9 ABOVE ON THE 9TH...
6 ABOVE ON THE 10TH...19 DEGREES ON THE 14TH...15 DEGREES ON THE
17TH...12 DEGREES ON THE 18TH AND 11 ABOVE ON THE 23RD.

TOTAL PRECIPITATION FOR APRIL WAS A TRACE...WHICH WAS 0 PERCENT OF
NORMAL. THE HIGHEST WIND GUST WAS 71 MPH...WHICH OCCURRED ON THE 8TH.


...THE ROCK SPRINGS WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1948 TO 2013

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            70   04/28
                        04/27
LOWEST              6   04/10
AVG. MAXIMUM     49.8              53.7    -3.9
AVG. MINIMUM     25.2              29.4    -4.2
MEAN             37.5              41.6    -4.1
DAYS MAX >= 90      0
DAYS MAX <= 32      3
DAYS MIN <= 32     23
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.74   1999
 MINIMUM         0.04   1987
TOTALS              TR             0.91   -0.91
DAILY AVG.          T              0.03   -0.03
DAYS >= .01         0
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL       T   04/22 TO 04/22
                        03/31 TO 04/01
                        04/01 TO 04/01

DEGREE_DAYS
HEATING TOTAL     817               703     114
 SINCE 7/1       7213              7532    -319
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              15.7
RESULTANT WIND SPEED/DIRECTION   6/282
HIGHEST WIND SPEED/DIRECTION    60/060    DATE  04/08
HIGHEST GUST SPEED/DIRECTION    71/060    DATE  04/08

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     53

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       5
LIGHT SNOW               12     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      4
HAZE                      4

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

LOOKING AHEAD TO MAY 2013...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 59 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 33. THE AVERAGE HIGH BY THE END OF THE MONTH IS 69 DEGREES...AND
THE AVERAGE LOW TEMPERATURE IS 42. THE AVERAGE MONTHLY PRECIPITATION
IS 1.21 INCHES.

$$