Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012154
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1200 PM MST WED MAR 1 2017

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

...OFFICIAL CLIMATE DATA FOR THE MONTH OF FEBRUARY 2017 WILL BE
AVAILABLE APPROXIMATELY IN APRIL 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 WARMER WITH RECORD BREAKING PRECIPITATION...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN FEBRUARY WAS 17.4
DEGREES...WHICH WAS 2.6 DEGREES ABOVE NORMAL. THIS MAKES IT THE
FOURTH WARMEST FEBRUARY ON RECORD. THE WARMEST READING OF THE MONTH
WAS ON THE 16TH WHICH IS ALSO A RECORD HIGH...REACHING 43 DEGREES
AND BREAKING THE PREVIOUS DAILY RECORD OF 37 DEGREES SET IN 2011.
THE COLDEST READING WAS 20 DEGREES BELOW ZERO ON THE 3RD...WHICH WAS
ALSO A NEW RECORD...BEATING THE 2011 TEMPERATURE OF 17 BELOW ZERO.

TOTAL PRECIPITATION FOR THE MONTH WAS 7.56 INCHES...WHICH WAS 6.15
INCHES ABOVE NORMAL AND 536 PERCENT OF NORMAL. THIS MAKES IT THE
WETTEST FEBRUARY ON RECORD....BEATING THE PREVIOUS MONTHLY RECORD OF
3.17 INCHES SET IN 2014. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS
THE 9TH AND 10TH...WHEN 1.23 INCHES FELL. THERE WERE NUMEROUS DAILY
RECORDS BROKEN IN FEBRUARY. 1ST...0.17 INCHES BREAKS 2006 RECORD OF
0.11 INCHES. 2ND...0.41 INCHES BREAKS 2007 RECORD OF 0.13.
4TH...0.48 INCHES BREAKS 2006 RECORD OF 0.19 INCHES. 5TH...0.43
INCHES BREAKS 2011 RECORD OF 0.26 INCHES. 6TH...1.19 INCHES
SHATTERED THE 1999 RECORD OF 0.13 INCHES. 7TH...0.43 INCHES BREAKS
THE 2014 RECORD OF 0.23. 9TH...0.97 INCHES BREAKS 0.26 INCHES SET IN
2015. 10TH...0.76 INCHES BREAKS 0.16 INCHES SET IN 2012. 18TH...0.26
INCHES BREAKS 0.22 INCHES SET IN 2016. 19TH...0.36 INCHES TIED 2014.
20TH...0.55 INCHES BREAKS 0.28 INCHES SET IN 2011...AND THE 21ST HAD
0.65 INCHES...BREAKING THE 2007 RECORD OF 0.45 INCHES SET IN 2007.

THE HIGHEST WIND GUST WAS 39 MPH ON THE 21ST.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF FEBRUARY
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              49   02/05/2000
 LOW              -38   02/24/2003
HIGHEST            43   02/16
LOWEST            -20   02/03
AVG. MAXIMUM     27.8
AVG. MINIMUM      7.0
MEAN             17.4              14.8     2.6
DAYS MAX >= 90      0
DAYS MAX <= 32     20
DAYS MIN <= 32     28
DAYS MIN <= 0      12

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.17   2014
 MINIMUM         0.58   2002
                        2001
TOTALS           7.56R             1.41    6.15
DAILY AVG.       0.27
DAYS >= .01        22
DAYS >= .10        16
DAYS >= .50         5
DAYS >= 1.00        1
GREATEST
 24 HR. TOTAL    1.23   02/09 TO 02/10

DEGREE_DAYS
HEATING TOTAL    1326              1406     -80
 SINCE 7/1       8058              7937     121
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              3.3
HIGHEST WIND SPEED/DIRECTION    20/280    DATE  02/21
HIGHEST GUST SPEED/DIRECTION    39/270    DATE  02/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.00
NUMBER OF DAYS FAIR           28
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                       2
LIGHT SNOW               10     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 MARCH 2017...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 32 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 5 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 41
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 14. THE AVERAGE MONTHLY
PRECIPITATION IS 1.21 INCHES.

$$



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