Alaska Extended Forecast Discussion...UPDATED National Weather Service College Park MD 557 PM EDT Wed Jul 9 2025 Valid 12Z Sun 13 Jul 2025 - 12Z Thu 17 Jul 2025 ...Guidance Evaluation and Preferences... Favored a blend of reasonably well clustered guidance from the 12 UTC GFS/ECMWF/Canadian models valid for Sunday/Monday in a generally blocky pattern with above normal predictability and WPC product continuity. Applied manual adjustments to this blend to develop a deeper maritime surface low to the southeast of the eastern Aleutians into early next week considering favorable closed low upper support in the models. Opted to transition on Tuesday to best clustered guidance from ECMWF/Canadian ensemble means by next midweek amid growing forecast spread/uncertainty. ...Pattern Overview and Weather/Hazards Highlights... The weather pattern from the weekend into early next week will be highlighted by closed upper lows both over the northern Bering Sea and also to the southeast of the eastern Aleutians, with progression slowed with development of an upper ridge up through the mainland. This ridge will support a period with very warm temps up through the 70s and for some spots 80F up through the Interior and into the North Slope, but slow pattern/system progression may moderate upper ridging and warmth next week. Meanwhile to the south, the series of impulses and lows moving over the Gulf of Alaska will bring some modest rain chances into southern and southeast Alaska, and more widespread with time next week for the Alaska Range and northward over the Mainland as upper ridging slowly erodes. Organized rain chances also working across the Bering Sea and Aleutians may become more directed into the western mainland and Southwest Alaska into mid-later next week. Schichtel Additional 3-7 Day Hazard Information can be found on the WPC medium range hazards outlook 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