Alaska Extended Forecast Discussion
National Weather Service College Park MD
647 PM EST Wed Dec 3 2025

Valid 12Z Sun 07 Dec 2025 - 12Z Thu 11 Dec 2025


...Overview...

Multiple shortwaves will merge with the closed low over Southern 
Alaska providing further amplification into early next week. 
Meanwhile, Siberian high pressure will persist and expand into the
Bering Strait and parts of the Seward Peninsula/northwestern 
Alaska. 


...Guidance Evaluation and Preferences...

The ECWMF and GFS continue to provide the most reasonable
solutions of this pattern and were utilized more heavily than 
other guidance. A previously notes, the deterministic Canadian 
model did not feature in any of the blends due to notable 
inconsistencies with the Euro/GFS clustered solutions, which
somewhat persisted with the most recent cycle. There's 
uncertainty on where exactly along the Gulf Coast a potentially 
impactful mid- level low and associated surface wave will set up 
late this weekend into next week.


...Weather/Hazards Highlights...

Multiple shortwaves crossing into the Gulf will merge into the low
in the Gulf, maintaining a mean trough and wet unsettled pattern
for the southern/southeast tier of the state. Heavy Rain and 
mountain snow along with strong, gusty winds will accompany this 
low near the Gulf Coast. High pressure from eastern Siberia to 
the North Slope will promote below average temperatures for those 
areas with the strong, gusty northeast winds. Temperatures over 
portions of the Interior/Yukon Flats will begin below average 
(-30F to -40F) and will slowly moderate through the week.

Campbell


Additional 3-7 Day Hazard Information can be found on the WPC
medium range hazards outlook chart at:
https://www.wpc.ncep.noaa.gov/threats/threats.php

WPC medium range Alaskan products including 500mb, surface
fronts/pressures progs and sensible weather grids can also be
found at:

https://www.wpc.ncep.noaa.gov/alaska/ak_5dayfcst500_wbg.gif
https://www.wpc.ncep.noaa.gov/alaska/akmedr.shtml
https://www.wpc.ncep.noaa.gov/alaska/ak_5km_gridsbody.html