Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012049
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
149 PM MST FRI DEC 1 2017

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

...OFFICIAL CLIMATE DATA FOR THE MONTH OF NOVEMBER 2017 WILL BE
AVAILABLE APPROXIMATELY IN JANUARY 2018 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

...NOVEMBER FOR LAKE YELLOWSTONE WAS THE WETTEST ON RECORD AND
SLIGHTLY WARMER...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN NOVEMBER WAS 23.3
DEGREES...WHICH WAS 0.7 DEGREES ABOVE NORMAL. THIS MAKES IT THE 8TH
WARMEST NOVEMBER ON RECORD. THE WARMEST READING OF THE MONTH WAS 51
DEGREES ON THE 26TH...WHICH BROKE THE PREVIOUS RECORD OF 43 DEGREES
SET IN 1998. THE COLDEST READING WAS -5 DEGREES ON THE 7TH WHICH
ALSO BROKE THE PREVIOUS RECORD OF -4 DEGREES SET IN 2000.
OTHER RECORDS SET WERE:
NEW RECORD (DATE)                          OLD RECORD (YEAR)
48 DEGREES ON THE 23RD...                  39 DEGREES (2015)
41 DEGREES ON THE 24TH TIED...             41 DEGREES (2011)
43 DEGREES ON THE 27TH TIED...             43 DEGREES (1998)

TOTAL PRECIPITATION FOR THE MONTH WAS 5.18 INCHES...WHICH WAS 249
PERCENT OF NORMAL OR 3.10 INCHES ABOVE NORMAL. THIS MAKES IT THE
WETTEST NOVEMBER ON RECORD. THE WETTEST 24 HOUR PERIOD OF THE
MONTH WAS THE 16TH...WHEN 0.98 INCHES FELL.  THIS SHATTERED THE
PREVIOUS RECORD OF 0.31 SET IN 2016.
SEVERAL OTHER RECORDS WERE ALSO SET DURING THE MONTH:
NEW RECORD (DATE)                          OLD RECORD (YEAR)
0.37 INCHES ON THE 1ST...                 0.10 INCHES (2016)
0.65 INCHES ON THE 3RD...                 0.51 INCHES (2013)
0.48 INCHES ON THE 4TH...                 0.47 INCHES (2008)
0.12 INCHES ON THE 5TH...                 0.10 INCHES (2015)
0.52 INCHES ON THE 27TH...                0.27 INCHES (2010)

THE HIGHEST WIND GUST WAS 34 MPH ON THE 1ST.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF NOVEMBER
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              57   11/01/2014
                        11/12/1999
                        11/07/1999
 LOW              -23   11/25/2010
HIGHEST            51   11/26
LOWEST             -5   11/07
AVG. MAXIMUM     32.9
AVG. MINIMUM     13.7
MEAN             23.3              22.6     0.7
DAYS MAX >= 90      0
DAYS MAX <= 32     16
DAYS MIN <= 32     29
DAYS MIN <= 0       6

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.66   2005
 MINIMUM         0.42   2000
TOTALS           5.18R             2.08    3.10
DAILY AVG.       0.17
DAYS >= .01        21
DAYS >= .10        13
DAYS >= .50         3
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.98   11/16 TO 11/16

DEGREE_DAYS
HEATING TOTAL    1243              1272     -29
 SINCE 7/1       3369              3320      49
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              3.1
HIGHEST WIND SPEED/DIRECTION    20/270    DATE  11/01
HIGHEST GUST SPEED/DIRECTION    34/280    DATE  11/01

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)     82

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                       1
LIGHT SNOW                6     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 DECEMBER 2017...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 26 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 6 DEGREES. THE AVERAGE HIGH TEMPERATURE BY THE END OF THE MONTH
IS 24 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 2. THE AVERAGE
MONTHLY PRECIPITATION IS 1.50 INCHES.  THE OFFICIAL START OF WINTER
BEGINS ON DECEMBER 21ST AT 0928 LOCAL TIME.

$$



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