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000
CXUS55 KRIW 022205
CLMRIW

CLIMATE REPORT...UPDATED
NATIONAL WEATHER SERVICE RIVERTON WY
1241 PM MDT WED MAY 1 2013

 ...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON REGIONAL
AIRPORT 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/...

...APRIL HAD NORMAL PRECIPITATION...BUT WAS MUCH COLDER THAN NORMAL
FOR RIVERTON...

THE AVERAGE TEMPERATURE FOR RIVERTON IN APRIL WAS 39.1 DEGREES...
WHICH WAS 5.1 DEGREES BELOW NORMAL. THE WARMEST READING FOR THE
MONTH WAS 76 DEGREES ON THE 27TH. THE COOLEST READING FOR THE MONTH
WAS 4 ABOVE ZERO ON THE 10TH. THIS SET A NEW RECORD LOW FOR THIS
DATE. THE PREVIOUS RECORD WAS 13 DEGREES IN 1997. SEVERAL OTHER
RECORD LOWS WERE SET IN APRIL.

APRIL 8TH...16 DEGREES. OLD RECORD 17 IN 1997.
      9TH...14 DEGREES. OLD RECORD 18 IN 1997.
     16TH...20 DEGREES. OLD RECORD 22 IN 1999.
     17TH...16 DEGREES. OLD RECORD 19 IN 1999.
     18TH...13 DEGREES. OLD RECORD 21 IN 1998.
     22ND...23 DEGREES. TIED OLD RECORD LAST SET IN 2011.
     23RD... 9 DEGREES. OLD RECORD 19 IN 2011.
     24TH...22 DEGREES. TIED OLD RECORD LAST SET IN 2011.

APRIL 2013 TIES APRIL 1997 FOR RECORD AVERAGE MONTHLY LOW
TEMPERATURE.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.30 INCHES. THIS WAS 100
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE
8TH AND 9TH...WHEN 0.37 OF AN INCH OF PRECIPITATION FELL. A NEW
RECORD OF 0.22 OF AN INCH FELL ON THE 16TH...BREAKING THE PREVIOUS
RECORD OF 0.21...SET BACK IN 2009. DURING THE MONTH...15.9 INCHES OF
SNOW FELL. THE HIGHEST WIND GUST WAS 52 MPH...WHICH OCCURRED ON THE
29TH.


...THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1995 TO 2013

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            76   04/27
LOWEST              4R  04/10
AVG. MAXIMUM     51.8              57.1    -5.3
AVG. MINIMUM     26.5              31.3    -4.8
MEAN             39.1              44.2    -5.1
DAYS MAX >= 90      0
DAYS MAX <= 32      5
DAYS MIN <= 32     21
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.80   1999
 MINIMUM         0.10   2007
TOTALS           1.30              1.30    0.00
DAILY AVG.       0.04              0.04    0.00
DAYS >= .01        10
DAYS >= .10         4
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.37   04/08 TO 04/09
 STORM TOTAL       MM
 (MM/DD(HH))

SNOWFALL (INCHES)
TOTALS           15.9                MM      MM
SINCE 7/1        35.8                MM      MM
SNOWDEPTH AVG.      1
DAYS >= 1.0         4

DEGREE_DAYS
HEATING TOTAL     768               624     144
 SINCE 7/1       7210              7396    -186
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.2
RESULTANT WIND SPEED/DIRECTION   4/321
HIGHEST WIND SPEED/DIRECTION    40/260    DATE  04/29
HIGHEST GUST SPEED/DIRECTION    52/260    DATE  04/29

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

AVERAGE RH (PERCENT)     51

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                2     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                3     SNOW                       5
LIGHT SNOW               12     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      4
HAZE                      7

-  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 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 55. THE AVERAGE MONTHLY
PRECIPITATION IS 1.72 INCHES.

$$