Climatological Report (Monthly)
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CXUS55 KRIW 011919 AAA
CLMCPR

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1215 PM MST THU JAN 1 2015

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE NATRONA COUNTY
INTERNATIONAL AIRPORT NEAR CASPER FOR THE MONTH OF DECEMBER 2014...

..OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 2014 WILL BE
AVAILABLE APPROXIMATELY IN FEBRUARY 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/...

...CASPER WAS MUCH WARMER AND SNOWIER THAN AVERAGE FOR DECEMBER...

THE AVERAGE TEMPERATURE FOR CASPER IN DECEMBER WAS 28.5 DEGREES
WHICH WAS 4.7 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE
MONTH WAS 60 DEGREES ON THE 12TH...AND THE COLDEST READING OF THE
MONTH WAS -16 DEGREES ON THE 30TH. THERE WERE THREE RECORD HIGHS
THAT WERE SET OR TIED DURING THE MONTH WITH 58 DEGREES TYING THE
RECORD ON THE 11TH...60 DEGREES BREAKING THE RECORD ON THE 12TH...
AND 57 DEGREES BREAKING THE RECORD ON THE 13TH.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.25 INCHES...WHICH WAS 255
PERCENT OF NORMAL. THIS MAKES IT THE 3RD WETTEST DECEMBER ON RECORD.
TOTAL SNOWFALL WAS 17.8 INCHES...WHICH IS TIED FOR THE 5TH SNOWIEST
DECEMBER. THE WETTEST 24 HOUR PERIOD OF THE MONTH...WAS ON THE 14TH
AND 15TH...WHEN 0.73 OF AN INCH OF PRECIPITATION FELL. 0.49 OF AN
INCH OF PRECIPITATION FELL ON THE 14TH...BREAKING THE PREVIOUS
RECORD OF 0.22...SET IN 1990. ON THE SAME DATE...5.0 INCHES OF
SNOWFALL OCCURRED...BREAKING THE PREVIOUS DAILY RECORD SNOWFALL OF
2.6 INCHES SET IN 1990. THE HIGHEST WIND GUST WAS 48 MPH...WHICH
OCCURRED ON THE 24TH.

...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1939 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              65   12/05/1939
 LOW              -41   12/21/1939
HIGHEST            60   12/12
LOWEST            -16   12/30
AVG. MAXIMUM     38.2              34.2     4.0
AVG. MINIMUM     18.7              13.5     5.2
MEAN             28.5              23.8     4.7
DAYS MAX >= 90      0
DAYS MAX <= 32      9
DAYS MIN <= 32     27
DAYS MIN <= 0       3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.71   1982
 MINIMUM         0.03   1952
TOTALS           1.25              0.49    0.76
DAILY AVG.       0.04              0.02    0.02
DAYS >= .01         9
DAYS >= .10         4
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.73   12/14 TO 12/15

SNOWFALL (INCHES)
TOTALS           17.8              11.0     6.8
SINCE 7/1        32.6              30.5     2.1
DAYS >= 1.0         5

DEGREE_DAYS
HEATING TOTAL    1124              1275    -151
 SINCE 7/1       2899              3129    -230
COOLING TOTAL       0                 0       0
 SINCE 1/1        357               422     -65
.................................................

WIND (MPH)
AVERAGE WIND SPEED              13.0
RESULTANT WIND SPEED/DIRECTION  10/229
HIGHEST WIND SPEED/DIRECTION    38/220    DATE  12/24
HIGHEST GUST SPEED/DIRECTION    48/210    DATE  12/24

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           21
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     64

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                1     SNOW                       3
LIGHT SNOW                9     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      1
HAZE                      5

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

LOOKING AHEAD TO JANUARY 2015...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 31 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 12 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 35
DEGREES...WITH AN AVERAGE LOW OF 13 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 0.51 INCHES. THE AVERAGE SNOWFALL IS 9.8 INCHES.

$$




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