Alaska Extended Forecast Discussion NWS Weather Prediction Center College Park MD 555 PM EDT Sat Apr 23 2022 Valid 12Z Wed Apr 27 2022 - 12Z Sun May 01 2022 ...Guidance/Predictability Assessment... The WPC Alaskan medium range product suite was mainly derived from a blend of the 12 UTC GEFS/NAEFS/ECMWF ensemble means for days 4-8 in a pattern with average to lower predictability aloft and with associated surface systems despite overall reasonably similar larger scale pattern evolutions. System variances remain less than stellar even early into the medium range time scales. This plan maintains good WPC product continuity. Coordination was limited as NWSchat is down and lingering AWIPS issues seem to have been enough overcome today to allow sensible weather grids production and transmission from WPC. However, the 19 UTC NBM was not yet available for this forecast package in GFE. ...Overview Weather/Hazard Highlights... Lead lingering low pressure systems over the northern and eastern Gulf of Alaska next week will continue some light to locally terrain enhanced moderate precipitation from the southern Coast to the Southeast Panhandle. Activity should wane with time as the lows weaken and lose influence. Moderate precipitation will also progress across the Aleutians and the Alaskan Peninsula/Kodiak Island with a couple of frontal systems/main lows through the period and as amplified upper low/troughing focus gradually transitions outward from the southern Bering Sea to the Gulf of Alaska later next week/weekend. Triple point low development may redevelop next weekend low focus over the Gulf and potentially enhance maritime affect and precipitation some by then to the southern Alaskan coast. Much of the Mainland inland should remain dry next week. However, uncertain but potentially amplified upper impulse/trough developments and terrain may favor some very localized enhanced snows for northern Alaska/the Interior. WPC shows a mean upper trough aloft over the region whose development seems reasonable considering expected upper ridge building earlier into this forecast period into western Alaska. The ECMWF ensemble mean seemed to show this best. 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