Alaska Extended Forecast Discussion NWS Weather Prediction Center College Park MD 559 PM EDT Mon May 30 2022 Valid 12Z Fri Jun 03 2022 - 12Z Tue Jun 07 2022 ...Overview and Weather and Hazard Highlights.. It remains the case that the upcoming early June pattern still seems fairly quiet for Alaska. An early week warm upper ridge over the Interior shows some weakness in guidance into later week to offer lingering chances for scattered showers/convection and local temperature moderation. This mean ridge separates Arctic upper troughs/lows to the north of Alaska that periodically force several fronts through the North Slope and northern Interior from several closed upper level/surface lows in the North Pacific. In this flow, a lead/lingering closed low and effects will slowly weaken well offshore over the southern/southeastern Gulf of Alaska this period. There is however still some periodic chance for light to locally moderate precipitation over southern/southeast Alaska mainly later period with an uncertain series of easterly waves riding underneath the mean ridge. Meanwhile, a closed upper trough/low with main/triple point surface lows will slowly transition from just to the south of the unsettled Aleutians to well offshore over the western/southwestern Gulf of Alaska as a moderate maritime threat. ...Guidance/Predictability Assessment... Latest guidance solutions remain pretty well clustered overall at larger scales for much of the Alaskan domain and vicinity, but pesky small-mid scale differences remain. This is mainly evident into early next week with higher latitude impulses working into the North Slope and Interior that could act to focus warm season local showers/convection. A WPC/Alaskan WFO collaborated decision was to use a composite blend of the best clustered and ensemble supported 12 UTC GFS/ECMWF/Canadian Friday into the weekend before transitioning to just the still quite compatible 12 UTC GEFS/NAEFS/ECMWF ensemble means by next week to provide a good/consistent forecast basis both over the Mainland and the North Pacific/Gulf of Alaska where main offshore low solutions remain well clustered. Manual edits were again applied to offset the averaging process as needed to best maintain product continuity in an overall pattern with average to better predictability. Schichtel Hazards: No significant hazards are expected over Alaska during this forecast period. 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