Climatological Report (Monthly) Issued by NWS
000
CXAK57 PAJK 042029
CLMYAK
NATIONAL WEATHER SERVICE JUNEAU AK
1121 AM AKST THU JAN 04 2024
...................................
...THE YAKUTAT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1917 TO 2024
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 61 12/15/2019
LOW 2 12/13/2021
HIGHEST 47 12/12 45 2
LOWEST 20 12/09 5 15
12/27
AVG. MAXIMUM 39.0 36.4 2.6
AVG. MINIMUM 30.1 25.1 5.0
MEAN 34.5 30.8 3.7
DAYS MAX >= 90 0 0.0 0.0
DAYS MAX <= 32 1 9.3 -8.3
DAYS MIN <= 32 17 23.3 -6.3
DAYS MIN <= 0 0 0.3 -0.3
PRECIPITATION (INCHES)
RECORD
MAXIMUM 35.21 1989
MINIMUM 3.51 1922
TOTALS 18.47 13.94 4.53
DAILY AVG. 0.60 0.45 0.15
DAYS >= .01 26 23.0 3.0
DAYS >= .10 21 18.3 2.7
DAYS >= .50 13 8.9 4.1
DAYS >= 1.00 5 4.6 0.4
GREATEST
24 HR. TOTAL 3.34 12/11 TO 12/12
DEGREE DAYS
HEATING TOTAL 935 1062 -127
SINCE 7/1 3387 3806 -419
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
FREEZE DATES
EARLIEST 09/25
LATEST 05/07
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 7.2
HIGHEST WIND SPEED/DIRECTION 39/120 DATE 12/12
HIGHEST GUST SPEED/DIRECTION 62/140 DATE 12/23
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 6 RAIN 14
LIGHT RAIN 21 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 1 SNOW 4
LIGHT SNOW 22 SLEET 0
FOG 30 FOG W/VIS <= 1/4 MILE 3
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
...ABOVE NORMAL TEMPERATURES AT THE START OF AN EL NINO WINTER...
Multiple record high temperatures during the month were completely
congruent with a strong El Nino. In fact, Juneau finished the month
nearly 6 degrees above normal for daily average temperatures and a
full 6 inches below normal for snowfall. The remaining climate sites
in Southeast Alaska also recorded 4 to 5 degrees above normal for
their daily average temps. Unfortunately, there is no longer
snowfall information for those locations, but it sure would be nice
to know how they measured when compared to their climate normal
values. While there was a dearth of snow for most of Southeast
Alaska, Skagway and Haines and the associated highways got quite a
bit of it. 4 separate winter storm warnings were issued for these
locations with all of them verifying. One event even included an
avalanche near Klukwan that was captured in a photograph.
A quick glance at the daily data for all 4 climate sites indicates
that the above normal monthly temps was more a result of daytime
highs rather than overnight lows. This departs from the typical
trend we have observed for many months where overnight lows were
more responsible for the warmer than normal temperatures.
In keeping with the trend from this Autumn, all 4 sites finished the
month with significantly above normal precipitation and Sitka nearly
achieving record precipitation for December. There is an established
and well studied connection between above normal normal temperatures
and the strong El Nino. Recent studies are hinting at a similar
relationship regarding precipitation too.
The month also saw a series of strong Autumn storms which, in
addition to producing heavy rain, resulted in high winds across much
of the Panhandle and northeast gulf coast. At various times during
the month, high wind warnings were issued for Yakutat, Skagway,
Juneau, Sitka, Prince of Wales Island, Ketchikan, and Metlakatla.
Fritsch
$$