Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 082209 CCB
CLMBYG

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
133 PM MDT WED MAY 2 2018

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE JOHNSON COUNTY
AIRPORT NEAR BUFFALO FOR THE MONTH OF APRIL 2018...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2018 WILL BE
AVAILABLE APPROXIMATELY IN 60 DAYS FROM THE NATIONAL CENTERS FOR
ENVIRONMENTAL INFORMATION (HTTP://WWW.NCDC.NOAA.GOV/CDO-
WEB/DATASETS). UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE
INTERNET AT HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...APRIL WAS COOLER AND SLIGHTLY DRIER THAN NORMAL IN BUFFALO...

THE AVERAGE TEMPERATURE FOR BUFFALO IN APRIL WAS 40.9 DEGREES. THIS
WAS 2.3 DEGREES BELOW NORMAL. THIS MAKES IT THE 7TH COLDEST APRIL
ON RECORD. THE WARMEST READING OF THE MONTH WAS 84 DEGREES ON THE
28TH...AND THE COLDEST WAS 4 DEGREES ON THE 3RD.
MULTIPLE TEMPERATURE RECORDS WERE BROKEN THIS MONTH:
DATE            NEW RECORD         OLD RECORD    DATE
3RD LOW OF        4    BREAKS             7      2002
6TH LOW OF       13    BREAKS            14      2009
7TH LOW OF       15    BREAKS            17      2007

16TH HIGH OF     77    BREAKS            74      2006
28TH HIGH OF     84    BREAKS            79      2007

TOTAL PRECIPITATION FOR THE MONTH WAS 0.73 INCHES...WHICH WAS 56
PERCENT OF NORMAL.  THIS MAKES IT THE 5TH DRIEST APRIL ON RECORD.
THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS ON THE 30TH...WHEN 0.20
INCHES FELL. A NEW DAILY RECORD WAS BROKEN ON THE 2ND WHEN 0.19
FELL...BREAKING THE PREVIOUS RECORD SET IN 2017 OF 0.13.
THE HIGHEST WIND GUST WAS 57 MPH ON THE 7TH.

...THE BUFFALO WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              84   04/28/2018
 LOW                4   04/03/2018
HIGHEST            84R  04/28
LOWEST              4R  04/03
AVG. MAXIMUM     54.6              54.1     0.5
AVG. MINIMUM     28.2              32.3    -4.1
MEAN             40.9              43.2    -2.3
DAYS MAX >= 90      0
DAYS MAX <= 32      2
DAYS MIN <= 32     17
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.38   1999
 MINIMUM         0.21   2007
TOTALS           0.73              1.30   -0.57
DAILY AVG.       0.02
DAYS >= .01         8
DAYS >= .10         3
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.22   04/30 TO 04/30

DEGREE_DAYS
HEATING TOTAL     667               654      13
 SINCE 7/1       6737              6844    -107
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              11.5
HIGHEST WIND SPEED/DIRECTION    44/350    DATE  04/07
HIGHEST GUST SPEED/DIRECTION    57/340    DATE  04/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       4
LIGHT SNOW               10     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      3
HAZE                      3

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

LOOKING AHEAD TO MAY 2018...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 59 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 37 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 68
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 44 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 2.53 INCHES.

$$



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