Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012051
CLMCPR

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
250 PM MDT FRI MAY 1 2015

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE CASPER-NATRONA COUNTY
INTERNATIONAL AIRPORT NEAR CASPER FOR THE MONTH OF APRIL 2015...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2015 WILL BE
AVAILABLE APPROXIMATELY IN JUNE 2015 FROM THE NATIONAL CLIMATIC
DATA CENTER (WWW.NCDC.NOAA.GOV). UNOFFICIAL ASOS DAILY SUMMARIES ARE
ONLINE AT WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW...

...CASPER WAS WETTER AND SLIGHTLY WARMER THAN AVERAGE FOR APRIL...

THE AVERAGE TEMPERATURE FOR CASPER IN APRIL WAS 43.7 DEGREES...WHICH
WAS 1 DEGREE ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS 78
DEGREES ON THE 14TH. THAT READING BROKE THE PREVIOUS RECORD HIGH OF
77 DEGREES SET ON THAT DATE IN 2002.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.66 INCHES...WHICH WAS 128
PERCENT OF NORMAL. THE WETTEST DAY OF THE MONTH WAS THE 17TH WHEN
0.53 INCHES OF PRECIPITATION FELL. A DAILY PRECIPITATION RECORD WAS
SET ON THE 26TH WITH 0.47 INCHES. THAT AMOUNT BROKE THE PREVIOUS
RECORD OF 0.37 INCHES SET ON THAT DATE IN 1983. TOTAL SNOWFALL FOR
THE MONTH WAS 4.7 INCHES...WHICH WAS 41 PERCENT OF NORMAL. THE
SNOWIEST DAY OCCURRED ON THE 15TH WHEN 3.1 INCHES FELL.

...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1939 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              84   04/30/1992
 LOW               -6   04/12/1997
HIGHEST            78   04/14
LOWEST             18   04/10
AVG. MAXIMUM     58.2              56.8     1.4
AVG. MINIMUM     29.3              28.6     0.7
MEAN             43.7              42.7     1.0
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     20
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.75   1941
 MINIMUM         0.08   1992
TOTALS           1.66              1.29    0.37
DAILY AVG.       0.06              0.04    0.02
DAYS >= .01         8
DAYS >= .10         3
DAYS >= .50         1
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.53   04/17 TO 04/17
                        04/16 TO 04/17
                        04/17 TO 04/17

SNOWFALL (INCHES)
TOTALS            4.7              11.6    -6.9
SINCE 7/1        65.4              71.9    -6.5
DAYS >= 1.0         2

DEGREE_DAYS
HEATING TOTAL     632               669     -37
 SINCE 7/1       6452              7042    -590
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.3
RESULTANT WIND SPEED/DIRECTION   2/276
HIGHEST WIND SPEED/DIRECTION    37/200    DATE  04/14
HIGHEST GUST SPEED/DIRECTION    63/200    DATE  04/14

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           19
NUMBER OF DAYS PC              5
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     56

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                6     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       2
LIGHT SNOW                8     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      2
HAZE                      1

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

LOOKING AHEAD TO MAY 2015...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 60...AND THE AVERAGE LOW TEMPERATURE IS 33.
THE AVERAGE HIGH BY THE END OF THE MONTH IS 70 DEGREES...AND THE
AVERAGE LOW IS 41. MAY IS THE WETTEST MONTH OF THE YEAR WITH AVERAGE
MONTHLY PRECIPITATION OF 2.06 INCHES. THE AVERAGE MONTHLY SNOWFALL
IS 3.7 INCHES.

$$





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