Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 021412
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
710 AM MST THU FEB 2 2017

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

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

...JANUARY WAS A VERY WET AND COLD MONTH FOR LAKE YELLOWSTONE...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN JANUARY WAS 5.7
DEGREES...WHICH WAS 7 DEGREES BELOW NORMAL.  THIS MAKES IT THE
SECOND COLDEST JANUARY ON RECORD. THE WARMEST READING OF THE
MONTH WAS 32 DEGREES ON THE 9TH...AND THE COLDEST READING
WAS 32 DEGREES BELOW ZERO ON THE 5TH. TWO RECORD DAILY LOWS WERE
SET LAST MONTH...21 DEGREES BELOW ZERO ON THE 4TH...BREAKING 17
BELOW SET IN 2013...AND 32 DEGREES BELOW ON THE 5TH...BREAKING 27
BELOW FROM 2004.

TOTAL PRECIPITATION FOR THE MONTH WAS 2.69 INCHES...WHICH WAS 0.58
INCHES ABOVE NORMAL AND 127 PERCENT OF THE NORMAL. THIS MAKES IT THE
2NS WETTEST JANUARY ON RECORD. THE WETTEST 24 HOUR PERIOD OF THE
MONTH WAS THE 10TH-11TH...WHEN 1.01 INCHES FELL. A NEW DAILY RECORD
OF 0.52 INCHES WAS SET ON THE 9TH...BREAKING THE PREVIOUS RECORD OF
0.33 SET BACK IN 2004...ON THE 11TH...0.82 INCHES OF PRECIPITATION
FELL BREAKING THE 2000 RECORD OF 0.81 INCHES...AND ON THE 31ST 0.12
INCHES BROKE THE 2006 RECORD OF 0.07 INCHES. THE HIGHEST WIND GUST
WAS 32 MPH ON THE 9TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF JANUARY
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              42   01/27/2015
                        01/20/2005
                        01/16/1974
 LOW              -36   01/12/2007
HIGHEST            32   01/09
LOWEST            -32   01/05
AVG. MAXIMUM     17.4
AVG. MINIMUM     -5.9
MEAN              5.7              12.7    -7.0
DAYS MAX >= 90      0
DAYS MAX <= 32     31
DAYS MIN <= 32     31
DAYS MIN <= 0      20

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.46   2006
 MINIMUM         0.14   2009
TOTALS           2.69R             2.11    0.58
DAILY AVG.       0.09
DAYS >= .01        15
DAYS >= .10         6
DAYS >= .50         2
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    1.01   01/10 TO 01/11

DEGREE_DAYS
HEATING TOTAL    1829              1621     208
 SINCE 7/1       6732              6531     201
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              1.6
HIGHEST WIND SPEED/DIRECTION    22/280    DATE  01/09
HIGHEST GUST SPEED/DIRECTION    32/270    DATE  01/09

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)     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                       0
LIGHT SNOW                3     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 FEBRUARY 2017...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 25 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 1 DEGREE ABOVE. THE AVERAGE HIGH BY THE END OF THE MONTH IS 32
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 5 ABOVE. THE AVERAGE
MONTHLY PRECIPITATION IS 1.41 INCHES.

$$


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