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000
CXUS55 KRIW 012024
CLMP60

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

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE 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 WAS COLDER AND WETTER THAN AVERAGE AT LAKE YELLOWSTONE...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN MARCH WAS 25.9
DEGREES...WHICH WAS 5.4 DEGREES BELOW NORMAL. THE WARMEST DAILY HIGH
FOR THE MONTH WAS 55 DEGREES ON THE 27TH...AND THE COLDEST READING
11 BELOW ON THE 23RD.

TOTAL PRECIPITATION FOR THE MONTH WAS 2.31 INCHES...WHICH WAS 111
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE
13TH...WHEN 0.63 OF AN INCH OF PRECIPITATION FELL. THE HIGHEST WIND
GUST WAS 36 MPH...WHICH OCCURRED ON THE 5TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              65   04/29/2007
 LOW              -17   04/02/2008
HIGHEST            55   04/27
LOWEST            -11   04/23
AVG. MAXIMUM     38.8
AVG. MINIMUM     13.0
MEAN             25.9              31.3    -5.4
DAYS MAX >= 90      0
DAYS MAX <= 32      8
DAYS MIN <= 32     30
DAYS MIN <= 0       6

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.59   2011
 MINIMUM         0.76   2008
TOTALS           2.31              2.08    0.23
DAILY AVG.       0.08
DAYS >= .01        15
DAYS >= .10         7
DAYS >= .50         2
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.63   04/13 TO 04/13

DEGREE_DAYS
HEATING TOTAL    1166              1012     154
 SINCE 7/1      10429             10251     178
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0

.................................................

WIND (MPH)
AVERAGE WIND SPEED              3.1
HIGHEST WIND SPEED/DIRECTION    20/280    DATE  04/20
HIGHEST GUST SPEED/DIRECTION    36/280    DATE  04/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.00
NUMBER OF DAYS FAIR           30
NUMBER OF DAYS PC              0
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                0     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     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 2013...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 47 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 24 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 56
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 32 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 2.27 INCHES.

$$