Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012018
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
125 PM MDT TUE SEP 1 2015

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE LAKE YELLOWSTONE FOR
THE MONTH OF AUGUST 2015...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF AUGUST 2015 WILL BE
AVAILABLE APPROXIMATELY IN OCTOBER 2015 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

...AUGUST WAS COOLER AND WETTER THAN NORMAL IN LAKE YELLOWSTONE...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN AUGUST WAS 53.3
DEGREES...WHICH WAS 1.9 DEGREES BELOW NORMAL. THE WARMEST READING OF
THE MONTH WAS 80 DEGREES ON THE 2ND AN THE 25TH. THIS TIED A RECORD
ON THE 25TH OF 80 DEGREES...SET IN 2008. ANOTHER DAILY RECORD HIGH
WAS TIED ON THE 24TH WHEN A HIGH OF 79 DEGREES MATCHED THE RECORD
SET IN 2011. THE COLDEST READING OF THE MONTH WAS 27 DEGREES ON THE
23RD. THIS SET A NEW RECORD...BREAKING THE PREVIOUS RECORD 28
DEGREES...SET IN 2008. ANOTHER RECORD LOW OF 36 DEGREES WAS SET ON
THE 6TH...BREAKING THE PREVIOUS RECORD OF 37 SET IN 2011. ANOTHER
RECORD LOW OF 28 DEGREES WAS SET ON THE 19TH...BREAKING THE PREVIOUS
RECORD OF 29 DEGREES...SET IN 2002. A RECORD DAILY WARM LOW
TEMPERATURE OF 46 DEGREES WAS SET ON THE 12TH...BREAKING THE
PREVIOUS RECORD OF 45 DEGREES SET IN 2003.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.85 INCHES...WHICH WAS 122
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE
8TH...WHEN 0.50 OF AN INCH OF PRECIPITATION FELL. 0.06 OF AN INCH OF
PRECIPITATION FELL ON THE 12TH...BREAKING THE PREVIOUS RECORD OF
0.01 SET IN 1998. 0.26 OF AN INCH OF PRECIPITATION FELL ON THE
27TH...BREAKING THE PREVIOUS RECORD OF 0.04 SET IN 2011.  THE
HIGHEST WIND GUST WAS 35 MPH ON THE 21ST.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              84   08/14/2003
                        08/12/2003
                        08/06/2001
 LOW               25   08/31/2005
HIGHEST            80   08/25
                        08/02
LOWEST             27   08/23
AVG. MAXIMUM     69.6
AVG. MINIMUM     37.0
MEAN             53.3              55.2    -1.9
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      7
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.29   2014
 MINIMUM         0.13   2012
TOTALS           1.85              1.52    0.33
DAILY AVG.       0.06
DAYS >= .01        10
DAYS >= .10         5
DAYS >= .50         1
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.50   08/08 TO 08/08

DEGREE_DAYS
HEATING TOTAL     353               304      49
 SINCE 7/1        685               587      98
COOLING TOTAL       0                 0       0
 SINCE 1/1          1                 0       1
.................................................

WIND (MPH)
AVERAGE WIND SPEED              2.7
HIGHEST WIND SPEED/DIRECTION    21/280    DATE  08/21
HIGHEST GUST SPEED/DIRECTION    35/280    DATE  08/21

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)     61

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 SEPTEMBER 2015...THE AVERAGE HIGH TEMPERATURE ON
THE FIRST OF THE MONTH IS 68 DEGREES...AND THE AVERAGE LOW
TEMPERATURE IS 35 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH
IS 55 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 28 DEGREES. THE
AVERAGE MONTHLY PRECIPITATION IS 1.30 INCHES.

$$


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