Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 020010
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
610 PM MDT SAT JUL 1 2017

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

...OFFICIAL CLIMATE DATA FOR THE MONTH OF JUNE 2017 WILL BE
AVAILABLE APPROXIMATELY IN AUGUST 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 THAN NORMAL IN JUNE...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN JUNE WAS 48.3
DEGREES...WHICH WAS 0.3 DEGREES BELOW NORMAL. THE WARMEST READING OF
THE MONTH WAS 77 DEGREES ON THE 26TH. A RECORD HIGH OF 73 DEGREES
WAS SET ON THE 8TH...TYING THE PREVIOUS RECORD SET IN 2016. THE
COLDEST READING WAS 27 DEGREES ON THE 11TH.  A RECORD LOW OF 27
DEGREES OCCURRED ON THE 23RD...TYING THE PREVIOUS RECORD...SET IN
2009.  A RECORD HIGH OF 28 DEGREES WAS SET ON THE 24TH...BREAKING
THE PREVIOUS RECORD OF 31 DEGREES SET IN 2010. A RECORD LOW OF 29
DEGREES OCCURRED ON THE 30TH...TYING THE PREVIOUS RECORD...SET IN
2014.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.98 INCHES...WHICH WAS 99
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE
12TH...WHEN 0.42 INCHES FELL. THIS BROKE THE PREVIOUS RECORD OF
0.16...SET IN 2013. 0.33 OF AN INCH FELL ON THE 27TH BREAKING THE
PREVIOUS RECORD OF 0.19 SET IN 2009.  0.38 OF AN INCH FELL ON THE
27TH BREAKING THE PREVIOUS RECORD OF 0.33 SET IN 2014.
THE HIGHEST WIND GUST WAS 42 MPH ON THE 4TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF JUNE
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              83   06/29/2015
 LOW               21   06/04/2011
HIGHEST            77   06/26
LOWEST             27   06/23
                        06/11
AVG. MAXIMUM     63.1
AVG. MINIMUM     33.5
MEAN             48.3              48.6    -0.3
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     15
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.34   2010
 MINIMUM         0.35   2007
TOTALS           1.98              2.00   -0.02
DAILY AVG.       0.07
DAYS >= .01         8
DAYS >= .10         6
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.42   06/12 TO 06/12

DEGREE_DAYS
HEATING TOTAL     495               493       2
 SINCE 7/1      11494             11521     -27
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              3.3
HIGHEST WIND SPEED/DIRECTION    26/280    DATE  06/04
HIGHEST GUST SPEED/DIRECTION    42/280    DATE  06/04

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)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       0
LIGHT RAIN                6     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                2     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 JULY 2017...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 69 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 38 DEGREES. THE AVERAGE HIGH TEMPERATURE BY THE END OF THE MONTH
IS 74 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 41. THE AVERAGE
MONTHLY PRECIPITATION IS 1.47 INCHES.

$$



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