Alaska Extended Forecast Discussion NWS Weather Prediction Center College Park MD 334 PM EDT Fri Aug 2 2019 Valid 12Z Tue Aug 6 2019 - 12Z Sat Aug 10 2019 Model guidance is suggesting the possibility of a rex block pattern developing over the North Pacific by the middle of next week with an upper level ridge over the Gulf of Alaska, and a broad low near 40 degrees north. The deterministic GFS and ECMWF were close enough to their ensemble means to incorporate them into this forecast, with increasing proportions of the means by days 6 through 8. By the end of the forecast period next Saturday, a significant storm system may develop over the western Aleutians and the southern Bering Sea, with the GFS, ECMWF, and CMC all indicating this in different locations. In terms of sensible weather, the most active day appears to be Tuesday across much of the Interior. A cold front is progged to move through the region and produce scattered to numerous showers and some thunderstorms, providing some relief to the ongoing drought situation. Drier conditions are expected to ensue going into the end of the week. The coolest conditions are forecast for eastern portions of the Interior, with lows ranging from the upper 30s to near 50 degrees, and highs generally in the 60s to lower 70s for most of the state. D. Hamrick 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 Hazards: - Heavy rain across portions of mainland Alaska, Mon-Tue, Aug 5-Aug 6. - High winds across portions of western mainland Alaska, Mon-Tue, Aug 5-Aug 6. 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