Alaska Extended Forecast Discussion NWS Weather Prediction Center College Park MD 328 PM EDT Sat May 11 2019 Valid 12Z Wed May 15 2019 - 12Z Sun May 19 2019 Upper ridging is forecast to remain dominant over the high latitudes over Russia and northern Canada (into northeastern Russia) as well as across the subtropics near Hawai'i. This favors troughing across the Bering Sea and along 50N to the south of the Gulf of Alaska. The ensembles were in very good agreement overall though the pattern contains several small-scale features that the ensembles are unable to fully capture. However, the 00Z GFS/ECMWF/Canadian formed a good consensus with a system projected to move generally well south of the area but close enough to wrap some moisture through its circulation into Southcentral (plus additional moisture for a lead system rotating/weakening into the Gulf Wed/Thu), with more over the Panhandle and Aleutians. The 12Z GFS was off in timing from the 00Z consensus and was not used. 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