Climatological Report (Monthly)
Issued by NWS

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302
CXUS55 KRIW 021346
CLMCPR

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

..PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE NATRONA COUNTY
INTERNATIONAL AIRPORT NEAR CASPER 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 COLDER THAN NORMAL IN CASPER...

THE AVERAGE TEMPERATURE FOR CASPER IN JANUARY WAS 20.6
DEGREES...WHICH WAS 4.1 DEGREES BELOW NORMAL. THE COLDEST READING
OF THE MONTH WAS 28 DEGREES BELOW ZERO ON THE 5TH...WHICH WAS ALSO
A NEW DAILY RECORD...BREAKING THE PREVIOUS LOW OF 24 BELOW SET IN
2014. THE WARMEST TEMPERATURE IN JANUARY WAS 42 DEGREES THAT
HAPPENED ON BOTH THE 9TH AND THE 31ST.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.54 INCHES...WHICH WAS JUST
0.03 INCHES ABOVE NORMAL FOR THE MONTH. DECEMBER PRECIPITATION WAS
106 PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS
THE 23RD-24TH WHEN 0.21 INCHES OF PRECIPITATION FALL. THE 23RD HAD
0.17 INCHES WHICH BROKE THE PREVIOUS RECORD OF 0.1 SET IN 1978. THE
HIGHEST WIND GUST WAS 61 MPH ON THE 7TH.

SNOWFALL FOR THE MONTH WAS 13.8 INCHES...WHICH IS 152 PERCENT OF
NORMAL..OR 4.7 INCHES ABOVE NORMAL. THE SNOWIEST DAY WAS THE 24TH
WITH 4.7 INCHES OF SNOW...WHICH BREAKS THE 2009 RECORD OF 3.7 INCHES.
THE 23RD ALSO HAD RECORD BREAKING SNOW WITH 3.4 INCHES...PREVIOUS
RECORD OF 3 INCHES IN 1949.

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

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1939 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              60   01/31/1971
                        01/30/1971
 LOW              -40   01/14/1972
                        01/13/1972
                        01/24/1949
HIGHEST            42   01/31
                        01/09
LOWEST            -28   01/05
AVG. MAXIMUM     29.5              35.2    -5.7
AVG. MINIMUM     11.7              14.3    -2.6
MEAN             20.6              24.7    -4.1
DAYS MAX >= 90      0
DAYS MAX <= 32     13
DAYS MIN <= 32     30
DAYS MIN <= 0       5

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         1.42   1987
 MINIMUM         0.03   2004
TOTALS           0.54              0.51    0.03
DAILY AVG.       0.02              0.02    0.00
DAYS >= .01         8
DAYS >= .10         3
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.21   01/23 TO 01/24

SNOWFALL (INCHES)
TOTALS           13.8               9.1     4.7
SINCE 7/1        39.2              39.6    -0.4
DAYS >= 1.0         4

DEGREE_DAYS
HEATING TOTAL    1367              1248     119
 SINCE 7/1       4250              4377    -127
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              15.7
RESULTANT WIND SPEED/DIRECTION  12/228
HIGHEST WIND SPEED/DIRECTION    49/220    DATE  01/07
HIGHEST GUST SPEED/DIRECTION    61/210    DATE  01/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           19
NUMBER OF DAYS PC              7
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                2     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW               13     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      0
HAZE                      4

-  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 35 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 14 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 42
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 18. THE AVERAGE MONTHLY
PRECIPITATION IS 0.57 INCHES.

$$



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