Alaska Extended Forecast Discussion National Weather Service College Park MD 625 PM EST Mon Nov 10 2025 Valid 12Z Fri 14 Nov 2025 - 12Z Tue 18 Nov 2025 ...Powerhouse Storm to Impact Aleutians/Bering/Southwest Alaska... ...Synoptic Overview... Storm systems will be mainly confined to maritime areas and the southern/southeast coastal tier into later week. In this flow a low pressure system will approach the southern Alaska Peninsula and Kodiak Island towards Friday with terrain enhanced rains and mountain snows into the weekend. Then, the signal is growing for the track of a much stronger storm to impact the Aleutians and the Bering Sea by this weekend before affecting Southwest Alaska. ...Guidance Evaluation/Preferences... Latest guidance shows stormy flow for portions of Alaska and vicinity through medium range time scales. Expect a cooled Interior/North Slope under a mean upper trough, albeit with limited QPF. Mid-later week storm energies are slated to work into the Gulf of Alaska and focus periods of enhanced winds/waves and precipitation into Southern to Southeast Alaska. Upstream, a deep extratropical low with energy and moisture connection to current West Pacific Typhoon Fung-Wong looks to focus impacts into the Aleutians/southern Bering Sea into this weekend and may affect Southwest Alaska and onward late weekend into early next week. Overall, favor a blend a best clustered guidance of the 12 UTC ECMWF and GEFS/ECMWF ensembles. WPC product continuity is good. ...Weather/Hazards Highlights... Periods of rain and mountain snow are likely for the southern coastal areas of the state Friday into Saturday as an emerging Gulf of Alaska low enhances onshore flow, but it mainly appears to be moderate in intensity for the most part. Mean temperatures are generally expected to trend below average across much of the Interior and the North Slope over much the forecast period. Looking ahead to the weekend into early next week, a very stormy and unsettled weather pattern will likely work to the Aleutians and Bering Sea. A deep and powerful low pressure system is expected to move off eastern Siberia and become occluded into the western Bering Sea. A stronger and impactful extratropcial low tracking from the northwest Pacific is then slated to lift ahead of the western Bering Sea low up through the Aleutians into the Bering Sea this weekend. This latter deep system has some energy and long fetch moisture connections to current west-Pacific Typhoon Fung- Wong. This will likely result in strong winds, heavy rains, and high seas through the Aleutians/Bering Sea and could lead into later weekend to early next week impacts into Southwest Alaska along with subsequent unsettling downstream translation of system energies and moderate precipitation/winds through the Alaska Peninsula to the Gulf of Alaska and southern Alaska tier. Schichtel 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