Climatological Report (Monthly)
Issued by NWS

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000
CXUS55 KRIW 010953
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
243 AM MDT SUN MAY 1 2016

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE LAKE YELLOWSTONE FOR
THE MONTH OF APRIL 2016...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2016 WILL BE
AVAILABLE APPROXIMATELY IN JUNE 2016 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.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...APRIL WAS MUCH WARMER AND SLIGHTLY DRIER THAN NORMAL FOR LAKE
YELLOWSTONE...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN APRIL WAS 34.8
DEGREES...WHICH WAS 3.5 DEGREES ABOVE NORMAL. THIS MAKES IT THE
WARMEST APRIL ON RECORD. THE WARMEST READING OF THE MONTH WAS 61
DEGREES ON THE 22ND...SETTING A NEW RECORD. THIS BROKE THE
PREVIOUS RECORD OF 58...SET IN 2006. THE COLDEST READING WAS 12
DEGREES ON THE 1ST.
NEW DAILY HIGH RECORDS INCLUDED...
50 DEGREES ON THE 3RD...  OLD RECORD WAS 49 FROM 2013
54 DEGREES ON THE 7TH...  TIED WITH 2005
54 DEGREES ON THE 8TH...  OLD RECORD WAS 51 FROM 2014
56 DEGREES ON THE 9TH...  OLD RECORD WAS 52 FROM 2014
55 DEGREES ON THE 12TH... OLD RECORD WAS 54 FROM 2003
57 DEGREES ON THE 20TH... TIED WITH 2010
56 DEGREES ON THE 21ST... TIED WITH 2009

TOTAL PRECIPITATION FOR THE MONTH WAS 1.35 INCHES...WHICH WAS 65
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE
24TH AND 25TH...WHEN 0.43 OF AN INCH OF PRECIPITATION FELL. THE
HIGHEST WIND GUST WAS 33 MPH ON THE 6TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2016

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              65   04/29/2007
 LOW              -17   04/02/2008
HIGHEST            61   04/22
LOWEST             12   04/01
AVG. MAXIMUM     47.0
AVG. MINIMUM     22.5
MEAN             34.8              31.3     3.5
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     30
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.59   2011
 MINIMUM         0.76   2008
TOTALS           1.35              2.08   -0.73
DAILY AVG.       0.05
DAYS >= .01        11
DAYS >= .10         5
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.43   04/24 TO 04/25

DEGREE_DAYS
HEATING TOTAL     902              1012    -110
 SINCE 7/1       9995             10251    -256
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              2.7
HIGHEST WIND SPEED/DIRECTION    21/290    DATE  04/06
HIGHEST GUST SPEED/DIRECTION    33/270    DATE  04/06

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)     64

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 2016...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 43 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 18 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 56
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 31 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 2.16 INCHES.

$$



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