Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 011644 CCA
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1012 AM MDT WED NOV 01 2023

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

...OFFICIAL CLIMATE DATA FOR THE MONTH OF OCTOBER 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 WETTER IN OCTOBER...

AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN OCTOBER WAS 35.7 DEGREES
WHICH IS 2.1 DEGREES ABOVE NORMAL. THE WARMEST READING OF THE MONTH
WAS 63 DEGREES ON THE 9TH AND 20TH. THE 20TH TIED THE 2003 RECORD OF
63. THE 19TH TIED THE 2003 RECORD OF 62. THE COLDEST READING OF THE
MONTH WAS ON THE 29TH  WITH 3 DEGREES BELOW ZERO.

TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 2.62 INCHES... WHICH WAS
142 PERCENT OF NORMAL. IT WAS THE 2ND WETTEST OCTOBER ON RECORD. THE
WETTEST 24-HOUR PERIOD DURING THE MONTH WAS THE 25-26TH WHEN 0.99
INCHES OF PRECIPITATION FELL. THE 25TH HAD 0.90 INCHES AND BROKE THE
2012 RECORD OF 0.70. THE HIGHEST WIND GUST WAS 30 MPH FROM THE WEST
ON THE 17TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF OCTOBER
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             74   10/02/2010
 LOW             -16   10/26/2020
HIGHEST           63   10/09
                       10/20
LOWEST            -3   10/29
AVG. MAXIMUM    47.6               45.5     2.1
AVG. MINIMUM    23.8               21.8     2.0
MEAN            35.7               33.6     2.1
DAYS MAX >= 90     0
DAYS MAX <= 32     5
DAYS MIN <= 32    30
DAYS MIN <= 0      2

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        5.78   2016
 MINIMUM        0.36   1998
TOTALS          2.62               1.85    0.77     1.83
DAILY AVG.      0.08               0.06    0.02
DAYS >= .01       13
DAYS >= .10        8
DAYS >= .50        1
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.99   10/25 TO 10/26
 STORM TOTAL    0.90

DEGREE DAYS
HEATING TOTAL    900                972     -72
 SINCE 7/1      1929               2201    -272
COOLING TOTAL      0                  0       0
 SINCE 1/1         0                  0       0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              2.1
RESULTANT WIND SPEED/DIRECTION   0/050
HIGHEST WIND SPEED/DIRECTION    17/270    DATE  10/17
HIGHEST GUST SPEED/DIRECTION    30/260    DATE  10/17

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)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                5     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 NOVEMBER 2023...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 38 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 16 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 26
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 6 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 2.06 INCHES.

$$


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