Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 011937
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
135 PM MDT SUN APR 1 2018

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE SOUTH BIG HORN COUNTY
AIRPORT NEAR GREYBULL FOR THE MONTH OF MARCH 2018...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF MARCH 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

...MARCH WAS SLIGHTLY COOLER THAN NORMAL FOR GREYBULL...

THE AVERAGE TEMPERATURE FOR GREYBULL FOR THE MONTH OF MARCH WAS 36.4
DEGREES. THIS WAS ONLY 0.5 DEGREES BELOW NORMAL. THE WARMEST READING
OF THE MONTH WAS 67 DEGREES ON THE 22ND...AND THE COLDEST READING
WAS 2 BELOW ON THE 1ST. ONE DAILY RECORD FOR LOW TEMPERATURE WAS
BROKEN ON THE 31ST WITH 18 DEGREES...BREAKING THE PREVIOUS RECORD
19 DEGREES SET IN 2009.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.33....WHICH WAS 83 PERCENT
OF NORMAL. THIS MAKES IT THE 4TH WETTEST MARCH SINCE 1998. THE
WETTEST 24 HOUR PERIOD WAS THE 28TH...WHEN 0.14 INCHES FELL. THERE
WERE THREE NEW DAILY PRECIPITATION RECORDS SET THIS MONTH. THE 4TH
HAD A TRACE TYING THE 2011 RECORD...THE 5TH HAD 0.05 INCHES WHICH
BREAKS A TRACE SET IN 2008 AND THE 16TH RECEIVED 0.14 INCHES
BREAKING THE 2015 RECORD OF 0.08. THE HIGHEST WIND GUST WAS 50 MPH
ON THE 9TH.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF MARCH 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              81   03/31/2012
 LOW              -12   03/09/2002
HIGHEST            67   03/22
LOWEST             -2   03/01
AVG. MAXIMUM     49.2              50.7    -1.5
AVG. MINIMUM     23.7              23.1     0.6
MEAN             36.4              36.9    -0.5
DAYS MAX >= 90      0
DAYS MAX <= 32      3
DAYS MIN <= 32     27
DAYS MIN <= 0       1

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         0.49   2003
 MINIMUM         0.00   2009
TOTALS           0.33              0.40   -0.07
DAILY AVG.       0.01              0.01    0.00
DAYS >= .01         3
DAYS >= .10         2
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.14   03/28 TO 03/28
                        03/16 TO 03/16

DEGREE_DAYS
HEATING TOTAL     876               871       5
 SINCE 7/1       7063              6842     221
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              7.5
HIGHEST WIND SPEED/DIRECTION    41/340    DATE  03/09
HIGHEST GUST SPEED/DIRECTION    50/330    DATE  03/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     65

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

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

LOOKING AHEAD TO APRIL 2018...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 57 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 28 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 65
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 37 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.71 INCHES.

$$



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