Climatological Report (Monthly)
Issued by NWS

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CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1154 AM MST SUN FEB 1 2015

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF JANUARY 2015...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF JANUARY 2015 WILL BE
AVAILABLE APPROXIMATELY IN MARCH 2015 FROM THE NATIONAL CLIMATIC
DATA CENTER (HTTP://WWW.NCDC.NOAA.GOV/OL/CLIMATEDATA.HTML).
UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE INTERNET AT
HTTP://WWW.CRH.NOAA.GOV/RIW/CLIMATE/...

...JANUARY WAS SLIGHTLY WARMER THAN AVERAGE AT LAKE YELLOWSTONE...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN JANUARY WAS 15.0
DEGREES...WHICH WAS 2.3 DEGREES ABOVE NORMAL. THE WARMEST DAILY HIGH
FOR THE MONTH WAS 42 DEGREES ON THE 27TH...WHICH BROKE THE PREVIOUS
RECORD OF 34 DEGREES...SET IN 2003. THIS ALSO TIED THE WARMEST
RECORDED TEMPERATURE IN JANUARY. A NEW RECORD HIGH OF 35 DEGREES
OCCURRED ON THE 28TH...BREAKING THE PREVIOUS RECORD OF 33...SET IN
2011. A NEW RECORD HIGH OF 33 DEGREES OCCURRED ON THE 25TH...TYING
THE PREVIOUS RECORD SET IN 2005. A NEW RECORD HIGH OF 34 DEGREES
OCCURRED ON THE 18TH...BREAKING THE PREVIOUS RECORD OF 32...ALSO SET
IN 2005. A NEW RECORD HIGH OF 31 DEGREES OCCURRED ON THE
10TH...BREAKING THE PREVIOUS RECORD OF 29...SET IN 2013. A NEW
RECORD HIGH OF 36 DEGREES OCCURRED ON THE 6TH...BREAKING THE
PREVIOUS RECORD OF 30...SET IN 2001. THE COLDEST READING FOR THE
MONTH WAS -14 DEGREES ON THE 22ND AND 31ST.

TOTAL PRECIPITATION FOR THE MONTH WAS 2.03 INCHES...WHICH WAS 96
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE
4TH AND 5TH...WHEN 0.88 OF AN INCH OF PRECIPITATION FELL. 0.75 OF
AN INCH OF PRECIPITATION FELL ON THE 5TH...BREAKING THE PREVIOUS
RECORD OF 0.51 INCHES SET IN 2008. 0.28 OF AN INCH OF PRECIPITATION
FELL ON THE 28TH...BREAKING THE PREVIOUS RECORD OF 0.16 INCHES SET
IN 2005.  0.27 OF AN INCH OF PRECIPITATION FELL ON THE
18TH...BREAKING THE PREVIOUS RECORD OF 0.22 INCHES SET IN 2012. THE
HIGHEST WIND GUST WAS 31 MPH...WHICH OCCURRED ON THE 18TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF JANUARY
2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2015

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            42R  01/27
LOWEST            -14   01/31
                        01/22
AVG. MAXIMUM     26.9
AVG. MINIMUM      3.1
MEAN             15.0              12.7     2.3
DAYS MAX >= 90      0
DAYS MAX <= 32     24
DAYS MIN <= 32     31
DAYS MIN <= 0      13

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.46   2006
 MINIMUM         0.14   2009
TOTALS           2.03              2.11   -0.08
DAILY AVG.       0.07
DAYS >= .01        14
DAYS >= .10         4
DAYS >= .50         1
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.88   01/04 TO 01/05

DEGREE_DAYS
HEATING TOTAL    1542              1621     -79
 SINCE 7/1       6317              6531    -214
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              1.4
HIGHEST WIND SPEED/DIRECTION    17/270    DATE  01/05
HIGHEST GUST SPEED/DIRECTION    31/270    DATE  01/18

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)     80

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                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 FEBRUARY 2015...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 21 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS -1 DEGREE. THE AVERAGE HIGH BY THE END OF THE MONTH IS 34
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 5. THE AVERAGE MONTHLY
PRECIPITATION IS 1.28 INCHES.

$$





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