Alaska Extended Forecast Discussion National Weather Service College Park MD 708 PM EDT Sun Jun 22 2025 Valid 12Z Thu 26 Jun 2025 - 12Z Mon 30 Jun 2025 ...Guidance Evaluation/Preferences... Favor a blend of reasonably well clustered guidance of the 12 UTC GFS/ECMWF/Canadian/UKMET (60%) and respective ensemble means (40%) in a pattern with above normal predictability and WPC product continuity through medium range time scales. Opted to manually deepen mainly offshore surface low pressure systems as warranted by favorable upper support to offset weakening inherent to a broad blending process used today. This correction was most evident with depiction of an extratropicaL low pressure system associated with newly formed T.D. 02W now over the western Pacific that is slated to reach and impact the Aleutians and Bering Sea by next weekend and possibly effect portions of the southwest mainland by the beginning of the following week. ...Weather/Hazards Highlights... A lingering lower-level front across Interior Alaska may continue to focus scattered showers and thunderstorms across the Brooks Range and Interior this week as enhanced more broadly across the region and the southern Alaskan tier by easterly waves on the northern periphery of the main low positions. This rainfall may prove helpful to mitigate some of the ongoing wildfire risk, but not enough to fully reduce the threat. Meanwhile, a series of ample energy transfers from the southern Bering Sea and Aleutians toward the northern Gulf of Alaska by later this week should favor development of enhanced rain chances from west to east over the Alaska Peninsula/Kodiak Island into Southcentral then Southeast Alaska as low pressure waves/triple- point lows eject eastward across the Gulf of Alaska to linger through the next week as aided by aforementioned easterly waves. There is a growing forecast signal to keep an eye on subsequent extratropical low pressure system development and track into the Bering Sea and vicinity next weekend that is associated with newly formed T.D. 02W now over the western Pacific. This system may offer deeper moisture with flow possibly slated to affect southwest Alaska and downstream into early next week to monitor. 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