Climatological Report (Monthly)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

000
CXUS55 KRIW 012052 CCA
CLMCPR

CLIMATE REPORT...CORRECTED
NATIONAL WEATHER SERVICE RIVERTON WY
152 PM MST SUN JAN 1 2017

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE NATRONA COUNTY
INTERNATIONAL AIRPORT NEAR CASPER FOR THE MONTH OF DECEMBER 2016...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 2016 WILL BE
AVAILABLE APPROXIMATELY IN FEBRUARY 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

...CASPER HAD A COLD AND WET DECEMBER...

THE AVERAGE TEMPERATURE FOR CASPER IN DECEMBER WAS 17.8
DEGREES...WHICH WAS 6.0 DEGREES BELOW NORMAL.  THIS MAKES IT THE 7TH
COLDEST DECEMBER ON RECORD. THE COLDEST READING OF THE MONTH WAS 33
DEGREES BELOW ZERO DEGREES ON THE 8TH...AND THE WARMEST WAS 50 ON
THE 24TH.  TWO DAILY RECORD LOWS WERE SET LAST MONTH...28 DEGREES
BELOW ZERO ON THE 7TH...BREAKING 23 BELOW SET IN 2005...AND 33
DEGREES BELOW ZERO SET ON THE 8TH...BREAKING -29 BELOW SET IN 2009.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.31 INCHES...WHICH WAS 0.82
INCHES ABOVE NORMAL FOR THE MONTH.  DECEMBER PRECIPITATION WAS 267
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE
5TH AND 25TH WHEN BOTH DAYS SAW 0.39 INCHES OF PRECIPITATION FALL.
BOTH OF THESE DAYS ALSO BROKE A DAILY RECORD.
THE PREVIOUS RECORD ON THE 5TH WAS 0.34 INCHES SET IN 1956...AND THE
PREVIOUS RECORD ON THE 25TH WAS 0.31 INCHES SET IN 1988.  A RECORD
WAS ALSO BROKEN ON THE 16TH WHEN 0.36 INCHES FELL...BREAKING THE
PREVIOUS RECORD OF 0.22 INCHES SET IN 1933.  THE HIGHEST WIND GUST
WAS 64 MPH ON THE 27TH.

SNOWFALL FOR THE MONTH WAS 22.2 INCHES...THIS WAS THE 4TH SNOWIEST
DECEMBER ON RECORD.

...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1939 TO 2016

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              65   12/05/1939
 LOW              -41   12/21/1939
HIGHEST            50   12/24
LOWEST            -33   12/08
AVG. MAXIMUM     29.4              34.2    -4.8
AVG. MINIMUM      6.2              13.5    -7.3
MEAN             17.8              23.8    -6.0
DAYS MAX >= 90      0
DAYS MAX <= 32     14
DAYS MIN <= 32     31
DAYS MIN <= 0       8

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.71   1982
 MINIMUM         0.03   1952
TOTALS           1.31              0.49    0.82
DAILY AVG.       0.04              0.02    0.02
DAYS >= .01        10
DAYS >= .10         3
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.43   12/25 TO 12/26

SNOWFALL (INCHES)
TOTALS           22.2              11.0    11.2
SINCE 7/1        25.4              30.5    -5.1
DAYS >= 1.0         5

DEGREE_DAYS
HEATING TOTAL    1457              1275     182
 SINCE 7/1       2883              3129    -246
COOLING TOTAL       0                 0       0
 SINCE 1/1        451               422      29
.................................................

WIND (MPH)
AVERAGE WIND SPEED              15.0
RESULTANT WIND SPEED/DIRECTION  11/229
HIGHEST WIND SPEED/DIRECTION    51/230    DATE  12/27
HIGHEST GUST SPEED/DIRECTION    64/210    DATE  12/27

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           23
NUMBER OF DAYS PC              5
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     69

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                3     SNOW                       5
LIGHT SNOW               17     SLEET                      0
FOG                      15     FOG W/VIS <= 1/4 MILE      3
HAZE                      8

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

LOOKING AHEAD TO JANUARY 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 35
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 14. THE AVERAGE MONTHLY
PRECIPITATION IS 0.51 INCHES.

$$



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.