Alaska Extended Forecast Discussion NWS Weather Prediction Center College Park MD 519 PM EST Fri Nov 29 2019 Valid 12Z Tue Dec 03 2019 - 12Z Sat Dec 07 2019 Suppression of the westerlies will continue next week as a strengthening west Pacific jet favors increased troughing over the Bering/Aleutians late next week. Lead-in pattern also features Bering troughing that will slip southeastward as narrow ridging pushes across the AKPEN/Southcentral next Thu-Sat. The models/ensembles were in good agreement overall with expected detail differences to start, so a blend sufficed for Tue-Thu. Surface high pressure will settle over northern/northeastern areas which will allow temperatures to fall to the -20s/-30s given enough clearing especially Thu/Fri. For next Fri/Sat, western Bering system will likely move eastward in pieces, with the first low pressure replaced by a wave along the front Thu-Fri. Ensembles favor a deep system below 980mb if it can materialize as a coherent low. Agreement is above average for a 7-8 day lead time on the longwave pattern. This system will push eastward along the Aleutians with generally quiet weather for the rest of the state. Fracasso Additional 3-7 Day Hazard information can be found on the WPC medium range hazards chart at: https://www.wpc.ncep.noaa.gov/threats/threats.php Hazard: - Heavy precipitation across portions of the Alaska Panhandle, Mon, Dec 2. - High winds across portions of mainland Alaska and the Aleutians, Fri, Dec 6. 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