Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 031806
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1053 AM MST WED JAN 03 2024

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

...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 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 IN DECEMBER...

AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN DECEMBER WAS 18.2
DEGREES WHICH IS 5.2 DEGREES ABOVE NORMAL. IT WAS THE WARMEST
DECEMBER ON RECORD...BREAKING THE 2014 MONTHLY RECORD OF 18.0
DEGREES. THE WARMEST READING OF THE MONTH WAS 42 DEGREES ON THE 6TH.
THE COLDEST READING OF THE MONTH WAS ON THE 25TH  WITH 11 DEGREES
BELOW ZERO. THERE WERE SEVERAL HIGH TEMPERATURE RECORDS BROKEN:

DATE    NEW      OLD   YEAR
6TH     42       35    2015
19TH    39       30    2004
20TH    34       33    2001
21ST    37 (TIE) 37    2019

TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 1.17  INCHES... WHICH
WAS 50 PERCENT OF NORMAL.THE WETTEST 24-HOUR PERIOD DURING THE MONTH
WAS THE 7TH-8TH WHEN 0.38 INCHES OF PRECIPITATION FELL. NO
PRECIPITATION RECORDS WERE BROKEN THIS MONTH. THE HIGHEST WIND GUST
WAS 31 MPH FROM THE SOUTHWEST ON THE 7TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER
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             46   12/12/2014
 LOW             -36   12/22/2022
HIGHEST           42   12/06
LOWEST           -11   12/25
AVG. MAXIMUM    28.4               23.3     5.1
AVG. MINIMUM     8.0                2.7     5.3
MEAN            18.2               13.0     5.2
DAYS MAX >= 90     0
DAYS MAX <= 32    23
DAYS MIN <= 32    31
DAYS MIN <= 0      7

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        5.15   2007
 MINIMUM        0.37   2000
TOTALS          1.17               2.35   -1.18     3.19
DAILY AVG.      0.04               0.08   -0.04
DAYS >= .01       11
DAYS >= .10        5
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.38   12/07 TO 12/08
 STORM TOTAL    0.31


DEGREE DAYS
HEATING TOTAL   1443               1612    -169
 SINCE 7/1      4517               5119    -602
COOLING TOTAL      0                  0       0
 SINCE 1/1         0                  0       0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              1.5
RESULTANT WIND SPEED/DIRECTION   0/320
HIGHEST WIND SPEED/DIRECTION    16/290    DATE  12/02
HIGHEST GUST SPEED/DIRECTION    31/240    DATE  12/07

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)     81

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                0     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
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 JANUARY 2024. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 22 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 1 DEGREE. THE AVERAGE HIGH BY THE END OF THE MONTH IS 23 DEGREES
AND THE AVERAGE LOW TEMPERATURE IS 0 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 1.80 INCHES.

$$


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