Alaska Extended Forecast Discussion NWS Weather Prediction Center College Park MD 321 PM EDT Tue May 07 2019 Valid 12Z Sat May 11 2019 - 12Z Wed May 15 2019 Models and ensembles still show a well established blocky flow pattern for the next week highlighted aloft by a closed and high amplitude Bering Sea trough extending across the Aleutians into the north Pacific and resultant high amplitude ridge centered over the northeast Pacific and southeast/eastern Alaska. Despite reasonably similar larger scale flow depictions, guidance solutions diverge through this forecast period with the timing and placement of vortices rotating around the Bering Sea trough and resultant placement of lows in the Bering/northern Pacific and adjacent Gulf of AK and southwestern AK. Perhaps the best guidance clustering is with respect to the potential formation and slow approach of a deepened low to the south of the Aleutians early to mid next week. Overall, the WPC Alaskan medium range product suite was primarily derived from a 50-50 blend of the compatable 12 UTC GEFS mean and 00 UTC ECMWF ensemble mean. Schichtel Bullet points from the WPC Days 3-7 Hazards chart can be found at: https://www.wpc.ncep.noaa.gov/threats/threats.php -- Heavy precipitation across portions of southern mainland Alaska, Fri, May 10. 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