Alaska Extended Forecast Discussion National Weather Service College Park MD 704 PM EST Thu Nov 13 2025 Valid 12Z Mon 17 Nov 2025 - 12Z Fri 21 Nov 2025 ...Powerhouse Storm to Impact Aleutians/Bering/Southwest Alaska... ...Synoptic Overview... A potent storm will be lifting through the Gulf and Bering ushering in high winds and waves to the Aleutians, Southwest Mainland and adjacent islands. Rain will also accompany this main feature and other disturbances moving through the Gulf of Alaska and Bering Sea, primarily focusing along coastal areas with some mountain snows possible. ...Guidance Evaluation/Preferences... Much of the Interior and North Slope vicinity will be cooler with limited areas of precipitation on a mean upper trough. Periods of enhanced wind/waves along with precipitation is expected to reach the Gulf and focus along the southern coast and Southeast. 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 and may affect Southwest Alaska and into next week. Substantial spread in the guidance persists keeping the specifics of timing and location of wind, wave, and precipitation impacts uncertain. Today the ECMWF position was far far displaced from the other globals and the weighting and heavy lean from the past few days was reduced given this trend. A multi-model blend was utilized initially before leaning to a combo of the CMC/UK/EC/GFS and means. Overall this held the system back over the Bering/Southwest Alaska. ...Weather/Hazards Highlights... Mean temperatures are generally expected to trend below average across much of the Interior and the North Slope over much the forecast period. A strong and impactful extratropcial low is slated to lift into the Bering Sea; which has some energy and long fetch moisture connections to current west-Pacific Typhoon Fung- Wong. This system is expected to have strong winds, heavy rains, and high seas through the Aleutians/Bering Sea and into some locations across Southwest Alaska. Downstream translation of system energies and moderate precipitation/winds through the Alaska Peninsula to the Gulf of Alaska and southern Alaska tier, keeping conditions wet and unsettled. 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