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