Alaska Extended Forecast Discussion NWS Weather Prediction Center College Park MD 307 PM EDT Fri May 31 2019 Valid 12Z Tue Jun 04 2019 - 12Z Sat Jun 08 2019 Upper ridging will linger over the Bering Sea with an upper low to its north in the Arctic (north of Siberia), an exiting system along 50N into SW Canada, and another central Pacific system well south of the area. That leaves most of the state in weak mid-level flow out of the north with generally light precipitation and near to above average temperatures. The 12Z GFS/FV3-GFS made a shift toward the larger consensus around the 00Z ECMWF with respect to an upper low moving westward through the Beaufort Sea in the short term. Though earlier runs brought this back to the east into northwestern Alaska, the newer 12Z runs maintain a westward motion. To the south, consensus approach served as a good starting point for the exiting system though Haida Gwaii late Tue/early Wed. Another system from the central Pacific will slide eastward along 45N well south of the area. This leaves much of the mainland with typical warm season inland/valley troughing north of the Alaska Range with a daily chance of showers/storms especially in higher terrain. Lifted indices of 0 to -2 are forecast to expand into late next week, supporting the thunderstorm risk. 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 No significant hazards are expected over Alaska during this forecast period. 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