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CXUS55 KRIW 020943
CLMP60

CYSCLMP60 000
TTAA00 KRIW 020835


CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
233 AM MDT SUN JUN 2 2013

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF MAY 2013...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2013 WILL BE
AVAILABLE APPROXIMATELY IN JULY 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/...

...MAY WAS SLIGHTLY DRIER THAN AVERAGE AT LAKE YELLOWSTONE...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN MAY WAS 40.0
DEGREES...WHICH WAS 0.0 DEGREES OF NORMAL. THE WARMEST DAILY HIGH
FOR THE MONTH WAS 70 DEGREES ON THE 13TH...WHICH BROKE THE PREVIOUS
RECORD OF 68 DEGREES...SET IN 2001. RECORD HIGHS OF 64 AND 65
DEGREES WERE SET ON THE 14TH AND 15TH...BREAKING THE PREVIOUS
RECORDS OF 64 AND 63 DEGREES...BOTH SET IN 2006. THE COLDEST READING
6 DEGREES ON THE 2ND.

TOTAL PRECIPITATION FOR THE MONTH WAS 2.03 INCHES...WHICH WAS 89
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE
18TH THROUGH THE 19TH...WHEN 0.61 OF AN INCH OF PRECIPITATION FELL.
0.16 OF AN INCH OF PRECIPITATION ON THE 17TH...SET A NEW
RECORD...BREAKING THE PREVIOUS RECORD OF 0.12 SET IN 2012. 0.46 AND
0.38 ALSO FELL ON THE 18TH AND 29TH...BREAKING THE PREVIOUS RECORDS
OF 0.34 AND 0.26...SET IN 2004 AND 2011 RESPECTIVELY. THE HIGHEST
WIND GUST WAS 30 MPH...WHICH OCCURRED ON THE 13TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF MAY 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              78   05/28/2003
 LOW                0   05/07/2010
HIGHEST            70   05/13
LOWEST              6   05/02
AVG. MAXIMUM     52.5
AVG. MINIMUM     27.6
MEAN             40.0              40.0     0.0
DAYS MAX >= 90      0
DAYS MAX <= 32      1
DAYS MIN <= 32     28
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.41   2004
 MINIMUM         0.72   2001
TOTALS           2.03              2.27   -0.24
DAILY AVG.       0.07
DAYS >= .01        15
DAYS >= .10         8
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.61   05/18 TO 05/19

DEGREE_DAYS
HEATING TOTAL     770               777      -7
 SINCE 7/1      11199             11028     171
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              2.3
HIGHEST WIND SPEED/DIRECTION    18/270    DATE  05/30
HIGHEST GUST SPEED/DIRECTION    30/300    DATE  05/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.00
NUMBER OF DAYS FAIR           31
NUMBER OF DAYS PC              0
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     67

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 JUNE 2013...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 59 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 31 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 71
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 39. THE AVERAGE MONTHLY
PRECIPITATION IS 2.11 INCHES.

$$