Climatological Report (Monthly)
Issued by NWS

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000
CXUS55 KRIW 011946
CLMP60

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

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE LAKE YELLOWSTONE 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 COLDER AND WETTER THAN NORMAL FOR LAKE YELLOWSTONE...

THE AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN MARCH WAS 19.7
DEGREES...WHICH WAS 3.3 DEGREES BELOW NORMAL. THIS MAKES IT THE 4TH
COLDEST MARCH ON RECORD SINCE 1998. THE WARMEST READING OF THE MONTH
WAS 49 DEGREES ON THE 14TH...AND THE COLDEST READING WAS 15 BELOW ON
THE 7TH...BREAKING THE PREVIOUS RECORD OF 10 BELOW FROM 2009.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.72 INCHES...WHICH WAS 142
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE
22ND WHEN 0.39 INCHES FELL. THIS ALSO BREAKS THE PREVIOUS DAILY
RECORD OF 0.29 SET IN 2011. THE HIGHEST WIND GUST WAS 34 MPH ON THE
30TH.

...THE LAKE YELLOWSTONE 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              55   03/31/2015
                        03/31/2004
                        05/28/2003
 LOW              -29   03/02/2002
HIGHEST            49   03/14
LOWEST            -15   03/07
AVG. MAXIMUM     32.6
AVG. MINIMUM      6.7
MEAN             19.7              23.0    -3.3
DAYS MAX >= 90      0
DAYS MAX <= 32     16
DAYS MIN <= 32     31
DAYS MIN <= 0       8

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.58   2014
 MINIMUM         0.68   1999
TOTALS           1.72              1.21    0.51
DAILY AVG.       0.06
DAYS >= .01        22
DAYS >= .10         5
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.39   03/22 TO 03/22

DEGREE_DAYS
HEATING TOTAL    1395              1302      93
 SINCE 7/1       9374              9239     135
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              2.6
HIGHEST WIND SPEED/DIRECTION    18/270    DATE  03/30
HIGHEST GUST SPEED/DIRECTION    34/270    DATE  03/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER             MM
NUMBER OF DAYS FAIR           31
NUMBER OF DAYS PC              0
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     73

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

-  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 41 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 14. THE AVERAGE HIGH TEMPERATURE BY THE END OF THE MONTH IS 47
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 24. THE AVERAGE MONTHLY
PRECIPITATION IS 2.08 INCHES.

$$


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