Alaska Extended Forecast Discussion NWS Weather Prediction Center College Park MD 756 PM EDT Tue Sep 28 2021 Valid 12Z Sat Oct 02 2021 - 12Z Wed Oct 06 2021 ...Pattern Overview and Guidance/Predictability Assessment... An active weather pattern can be expected during the extended forecast period across the Alaska domain with two large storm systems. The first will be over the northern Gulf and peaking in intensity Friday night and into early Saturday before steadily weakening through the remainder of the weekend. The second system will be the extratropical version of what is now Typhoon Mindulle and this is forecast to cross the Bering early next week, with a narrow ridge axis between these two storm systems. Model guidance is initially well clustered with the Gulf system for the weekend, and a general deterministic blend would suffice here. For the Bering Sea system early next week, the ECMWF/ECENS is actually more progressive than the GFS/GEFS, with the CMC slightly farther south with the low track. ...Weather/Hazard Highlights... A vigorous storm system digging through the eastern Bering Sea this week will slam into a highly unsettled Gulf of Alaska Friday and the weekend to present a substantial maritime threat for high waves/winds along with heavy rain/snow for especially coastal areas of south-central Alaska through the Southeast Panhandle with moistening onshore flow. Meanwhile, A deep extratropical low associated with current west Pacific Typhoon Mindulle is slated to track toward the southern Bering Sea and Aleutians by early next week to present another significant heavy seas/wind and wrapping rainfall threat. Hamrick Hazards: - Heavy precipitation across portions of the Alaska Panhandle and mainland Alaska, Fri-Sat, Oct 1-Oct 2. - High winds across portions of the Alaska Panhandle and mainland Alaska, Fri-Sat, Oct 1-Oct 2. - High winds across portions of the Aleutians, Mon-Tue, Oct 4-Oct 5. 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