Climatological Report (Monthly)
Issued by NWS Riverton, WY

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CXUS55 KRIW 021443
CLMRIW

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


...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON REGIONAL AIRPORT
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 SET RECORD COLD AND SNOW AND PRECIPITATION AMOUNTS...

THE AVERAGE TEMPERATURE FOR RIVERTON IN JANUARY WAS 7.1 DEGREES...
WHICH WAS 12.8 DEGREES BELOW NORMAL. THIS MAKES IT THE COLDEST
JANUARY ON RECORD SINCE 2008 WITH AN AVERAGE OF 12.1 DEGREES.
THE WARMEST READING OF THE MONTH WAS 43 DEGREES ON THE 9TH...AND
THE COLDEST WAS 25 DEGREES BELOW ZERO ON THE 6TH. SEVERAL NEW
DAILY RECORD LOWS WERE SET...10 BELOW ON THE 3RD BREAKING THE 2011
RECORD OF 8 BELOW...21 BELOW ON THE 5TH BREAKING 16 BELOW IN 2004.
ON THE 6TH...25 BELOW BROKE THE 2004 RECORD OF 20 BELOW...THE 7TH
HAD 23 BELOW...BREAKING THE 2010 RECORD OF 15 BELOW...THE 18TH
HAD 2 BELOW WHICH TIED THE 2007 RECORD...AND ON THE 28TH A LOW OF
8 BELOW BROKE THE 2007 RECORD OF 7 DEGREES BELOW ZERO.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.01 INCHES...WHICH WAS
0.77 INCHES ABOVE NORMAL OR 421 PERCENT OF NORMAL FOR JANUARY.
THIS MAKES IT THE WETTEST JANUARY ON RECORD SINCE 1968. THE WETTEST
24 HOUR PERIOD WAS THE 23RD-24TH...WHEN 0.63 OF AN INCH FELL. DAILY
PRECIPITATION RECORDS FELL IN JANUARY...0.03 INCHES ON THE 1ST TIED
THE 2001 RECORD...0.18 INCHES ON THE 2ND BROKE THE 2009 RECORD OF
0.01 INCHES. 0.45 INCHES ON THE 23RD BROKE A TRACE SET IN 2012...
AND 0.22 ON THE 24TH BROKE THE 2016 RECORD OF 0.05.

TOTAL SNOWFALL FOR THE MONTH WAS 16.4 INCHES...WHICH IS 342 PERCENT
OF NORMAL OR 11.6 INCHES ABOVE NORMAL. IT WAS THE SNOWIEST JANUARY
SINCE 2014...WHEN 11.1 INCHES FELL. THE HIGHEST WIND GUST WAS 46
MPH ON THE 9TH.

...THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1995 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              57   01/19/2009
 LOW              -25   01/06/2017
                        01/22/2008
                        01/12/1963
HIGHEST            43   01/09
LOWEST            -25R  01/06
AVG. MAXIMUM     18.0              31.3   -13.3
AVG. MINIMUM     -3.7               8.5   -12.2
MEAN              7.1             19.9    -12.8
DAYS MAX >= 90      0
DAYS MAX <= 32     26
DAYS MIN <= 32     28
DAYS MIN <= 0      20

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         0.68   2014
 MINIMUM         0.01   1999
TOTALS           1.01R             0.24    0.77
DAILY AVG.       0.03              0.01    0.02
DAYS >= .01         6
DAYS >= .10         4
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.63   01/23 TO 01/24
 STORM TOTAL       MM
 (MM/DD(HH))

SNOWFALL (INCHES)
TOTALS           16.4R              4.8    11.6
SINCE 7/1        33.4
SNOWDEPTH AVG.      7
DAYS >= 1.0         4

DEGREE_DAYS
HEATING TOTAL    1623              1398     225
 SINCE 7/1       4749              4715      34
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              4.7
RESULTANT WIND SPEED/DIRECTION   2/308
HIGHEST WIND SPEED/DIRECTION    39/300    DATE  01/09
HIGHEST GUST SPEED/DIRECTION    46/300    DATE  01/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           22
NUMBER OF DAYS PC              3
NUMBER OF DAYS CLOUDY          6

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                2     SNOW                       3
LIGHT SNOW                9     SLEET                      0
FOG                      20     FOG W/VIS <= 1/4 MILE      9
HAZE                     13

-  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 32 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 10 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 41
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 17. THE AVERAGE
MONTHLY PRECIPITATION IS 0.27 INCHES.

$$



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