Snowhaven Ski Area Snow Report

466 FXUS65 KMSO 112031 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 131 PM MST Wed Nov 11 2026 .DISCUSSION... KEY MESSAGES: - Through Friday Fog & Low Cloud Potential: Strong high pressure increasing likelihood of valley inversions. - Pattern Shift: A Pacific system will tap into atmospheric river moisture beginning Saturday, snow levels stay above 6000 feet and precipitation amounts light. - Further cooling early to mid next week with potential for snow levels to lower further. High pressure was sufficient enough to produce morning valley fog but low level mixing has broken inversions and dissipated fog. High clouds are moving over the area yet temperatures will warm well above normal for this time of year in most locations. Clearing overnight may allow for some radiational cooling and reintroduction of valley fog Thursday morning. Pacific moisture wraps around a powerful Pacific low pressure system as it drops south along the west coast Friday. While it will bring a warm southerly flow, it will also increase clouds which in turn will limit warming Friday and Saturday (even limited warming will run 10 degrees above normal in locations). A little light precipitation is expected in north- central and Lemhi County ID Saturday with no impacts expected. The next push of moisture arrives late Monday affecting the region through Wednesday morning. Precipitation amounts are light but have trended up over the past couple model runs. Additionally, snow levels that will remain above 6000 feet this weekend slowly lower to around 4000 feet by Wednesday morning. A light accumulation may develop by Wednesday morning in higher valleys of southwest MT and Lemhi County ID, but in the Anaconda and Pintler Mountains a few to 6 inches of snow is possible along with periods of slick driving conditions over MacDonald and Lost Trail Passes. While impacts should be limited to near the passes, they will also dissipate rapidly as the sun rises Wednesday. If precipitation amounts continue to trend up, impacts could increase and expand, stay updated to future forecasts. && .AVIATION...Fog and low stratus has largely lifted out of area terminals this morning as a thick shield of upper level cloud cover moves into western Montana and north central Idaho. Winds will largely remain light and terrain driven, preventing a well mixed boundary layer going onto this evening. Going into tonight, periods of high clouds may limit how widespread fog development becomes in the overnight hours. Despite this, strong radiational cooling is still expected to drive recurring overnight and early morning valley fog mainly along and north of Interstate 90, including KMSO and KGPI. Furthermore, with Flathead Lake surface temperatures remaining near 50F, the cold and stable airmass will allow the lake to act as a localized moisture source, fueling low stratus and fog across the Flathead and Mission valleys (potentially impacting KGPI) through the end of the week. Further south, terminals KHRF, KSMN and KBTM are experiencing drier conditions at the surface and thus fog or stratus development is not likely. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. && $$