Climatological Report (Monthly)
Issued by NWS

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000
CXUS55 KRIW 011936
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1134 AM MDT TUE AUG 1 2017

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE LAKE YELLOWSTONE FOR
THE MONTH OF JULY 2017...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF JULY 2017 WILL BE
AVAILABLE APPROXIMATELY IN SEPTEMBER 2017 FROM THE NATIONAL CENTER
FOR ENVIRONMENTAL INFORMATION (HTTP://WWW.NCEI.NOAA.GOV/OL/
CLIMATEDATA.HTML). UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON
THE INTERNET AT HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...LAKE YELLOWSTONE WAS SLIGHTLY WARMER AND SLIGHTLY WETTER IN
JULY...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN JULY WAS 57.5
DEGREES...WHICH WAS 1.6 DEGREES ABOVE NORMAL. THIS MAKES IT THE 8TH
WARMEST JULY ON RECORD. THE WARMEST READING OF THE MONTH WAS 82
DEGREES ON THE 24TH...SETTING A NEW RECORD. THIS BROKE THE PREVIOUS
RECORD OF 80...SET IN 2007. A RECORD HIGH OF 81 DEGREES WAS SET ON
THE 5TH...TYING THE PREVIOUS RECORD SET IN 2007. THE COLDEST READING
WAS 33 DEGREES ON THE 1ST.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.80 INCHES...WHICH WAS 122
PERCENT OF NORMAL. THIS MAKES IT THE 5TH WETTEST JULY ON RECORD. THE
WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE 25TH...WHEN 0.67 INCHES
FELL...AND SETTING A NEW RECORD. THIS BROKE THE PREVIOUS RECORD OF
0.26...SET IN 2005. 0.05 OF AN INCH OF PRECIPITATION FELL ON THE
24TH...WHICH TIED THE PREVIOUS RECORD SET IN 2007. 0.51 OF AN INCH
OF PRECIPITATION FELL ON THE 28TH...BREAKING THE PREVIOUS RECORD OF
0.27...WHICH WAS SET IN 2013. 0.09 OF AN INCH OF PRECIPITATION FELL
ON THE 29TH...BREAKING THE PREVIOUS RECORD OF 0.06...SET IN 2014.
THE HIGHEST WIND GUST WAS 35 MPH ON THE 24TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF JULY 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              86   07/14/2002
                        07/31/2000
 LOW               27   07/12/2008
HIGHEST            82   07/24
LOWEST             33   07/01
AVG. MAXIMUM     74.8
AVG. MINIMUM     40.2
MEAN             57.5              55.9     1.6
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.42   2007
 MINIMUM         0.20   2008
TOTALS           1.80              1.47    0.33
DAILY AVG.       0.06
DAYS >= .01        11
DAYS >= .10         3
DAYS >= .50         2
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.67   07/25 TO 07/25

DEGREE_DAYS
HEATING TOTAL     226               283     -57
 SINCE 7/1        226               283     -57
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              2.4
HIGHEST WIND SPEED/DIRECTION    22/270    DATE  07/24
HIGHEST GUST SPEED/DIRECTION    35/280    DATE  07/24

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)     62

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                2     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 AUGUST 2017...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 74 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 41 DEGREES. THE AVERAGE HIGH TEMPERATURE BY THE END OF THE MONTH
IS 69 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 36. THE AVERAGE
MONTHLY PRECIPITATION IS 1.52 INCHES.

$$


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