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000
CXUS55 KRIW 111904
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1252 PM MDT SUN JUN 11 2023

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF MAY 2023...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2023 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

...LAKE YELLOWSTONE WAS WARMER AND DRIER THAN NORMAL IN MAY...

AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN MAY WAS 42.3 DEGREES
WHICH WAS 3.9 DEGREES ABOVE NORMAL. IT WAS THE WARMEST MAY ON
RECORD. THE WARMEST READING OF THE MONTH WAS 66 DEGREES ON THE 21ST.
THE HIGH OF 62 DEGREES ON THE 1ST TIED 2007. THE 2ND HIT 64 AND
BROKE THE 2015 RECORD OF 61. THE 3RD HIT 59 DEGREES AND TIED 2004.
THE 22ND HIT 64 DEGREES AND TIED 2001. THE COLDEST READING OF THE
MONTH WAS ON THE 6TH AND 10TH WITH 22 DEGREES.

TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 1.20 INCHES... WHICH WAS
51 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH
WAS THE 4TH-5TH WHEN 0.43 INCHES OF PRECIPITATION FELL. THE 4TH HAD
0.33 INCHES AND BROKE THE 2021 RECORD OF 0.29. THE HIGHEST WIND GUST
WAS 31 MPH FROM THE WEST ON THE 7TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF MAY
2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             78   05/28/2003
 LOW               0   05/07/2010
HIGHEST           66   05/21
LOWEST            22   05/06
                       05/10
AVG. MAXIMUM    55.7               50.6     5.1
AVG. MINIMUM    28.9               26.3     2.6
MEAN            42.3               38.4     3.9
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32    26
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        4.53   2022
 MINIMUM        0.42   2019
TOTALS          1.20               2.35   -1.15     4.53
DAILY AVG.      0.04               0.08   -0.04
DAYS >= .01       14
DAYS >= .10        5
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.43   05/04 TO 05/05
 STORM TOTAL    0.33


DEGREE DAYS
HEATING TOTAL    697                823    -126
 SINCE 7/1     11463              11473     -10
COOLING TOTAL      0                  0       0
 SINCE 1/1         0                  0       0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              1.4
RESULTANT WIND SPEED/DIRECTION   1/090
HIGHEST WIND SPEED/DIRECTION    16/270    DATE  05/07
                                16/280          05/22
HIGHEST GUST SPEED/DIRECTION    31/280    DATE  05/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.00
NUMBER OF DAYS FAIR           31
NUMBER OF DAYS PC              0
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     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 JUNE 2023...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 56 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 31 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 68
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 36 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 2.38 INCHES.

$$