Alaska Extended Forecast Discussion NWS Weather Prediction Center College Park MD 552 PM EDT Sun May 31 2020 Valid 12Z Thu Jun 04 2020 - 12Z Mon Jun 08 2020 ...Overview and Guidance/Predictability Assessment... Upper pattern will be driven by a slowly eastward-moving upper high just north of the North Slope as well as an incoming upper low from the Bering Sea/Strait. An upper low in the Gulf on Thursday will slowly sink southeastward. The models and ensembles have been in good agreement over the past few days and a deterministic blend of the recent 12Z guidance sufficed to start (Thu-Sat). By next Sat-Mon, the 12Z GFS/ECMWF and their ensemble means represented a good middle ground as the Bering upper low pushes into Bristol Bay while a North Pacific system lifts toward 50N. The Interior will remain separated from the height anomaly centers in the col. ...Weather Hazards/Threats... Above average temperatures for western mainland Alaska will trend a bit cooler with time as the upper low brings cooler temperatures to southwestern areas. Weak mid-level flow near the Alaska Range to the Tanana Valley will promote scattered showers and some convection through the period, some of which could be locally modest in amounts. Temperatures will be within several degrees of normal between the Alaska and Brooks Range, but near to below normal over Southcentral to the Panhandle. By next weekend, a system over the central North Pacific will likely remain well south of the area. 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 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