


Area Forecast Discussion
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
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935 FXUS65 KTFX 290158 AFDTFX Area Forecast Discussion National Weather Service Great Falls MT 758 PM MDT Sat Jun 28 2025 .KEY MESSAGES... - Isolated to scattered showers and thunderstorms expected across Northern Montana this afternoon and evening - Turning warmer next week with many low elevation locations seeing temperatures exceed 90 - Dry early next week, with showers and thunderstorms looking to return around midweek && .UPDATE... Upper level ridging is beginning to nudge eastward from the Pacific Northwest this evening. Before those effects begin to be felt, troughing with axis centered across eastern MT is resulting in a few lingering showers and isolated thunderstorms. These are mainly confined to areas near the Hi-Line and in the West Yellowstone area. High resolution guidance suggests these will decrease in coverage through the remainder of the evening and early overnight as ridging begins to take hold. Temperatures begin to trend warmer Sunday as the ridging builds in, with a dry period developing throughout least Monday. Overall, minimal changes were needed this evening - just minor tweaks to PoPs to account for current trends. -AM && .DISCUSSION... /Issued 517 PM MDT Sat Jun 28 2025/ - Meteorological Overview: Aside from a few scattered showers and thunderstorms across North Central Montana, the next few days will be rather dry as upper level ridging begins to build across the North Western United States. As this ridge builds across the region, temperatures will begin to climb, with many areas seeing temperatures climb into the 90s by Monday or Tuesday. Warm temperatures will linger across the area until around Friday. Moisture working into the area will allow for some showers and thunderstorms as early as Wednesday, with chances increasing through the remainder of the week into Independence Day. - Forecast Confidence & Scenarios: Temperatures next week: Confidence is rather high in a period of seasonably warm temperatures for a good chunk of next week thanks to a building upper level ridge. Overall, there doesnt appear to be much in the way of uncertainty with regards to actual temperatures, as model spreads are generally within 5 degrees or so across the area. Biggest area of uncertainty will be in regards to showers and thunderstorms beyond Wednesday, as a well timed shower or storm may keep temperatures from reaching their full potential. Showers and thunderstorms next week: As moisture begins to sneak into the plains of Montana next week, the added moisture will help to add some instability to the atmosphere and allow for afternoon showers and thunderstorms to develop every day from Wednesday. There does remain a fair amount of uncertainty as to the coverage and strength of the storms, as the warm air aloft and weak directional wind shear may limit thunderstorm potential. With that said, a few of the storms could muster enough strength and organization to allow for some gusty winds and hail to form. Ludwig&& .AVIATION... 29/00Z TAF Period Aside from a few lingering showers and isolated thunderstorms this evening along the Hi-Line and in the KWYS area, benign conditions are forecast as an upper level ridge begins building in. -AM Refer to weather.gov/zlc for more detailed regional aviation weather and hazard information. && .AVIATION... 29/00Z TAF Period Aside from a few lingering showers and isolated thunderstorms this evening along the Hi-Line and in the KWYS area, benign conditions are forecast as an upper level ridge begins building in. -AM Refer to weather.gov/zlc for more detailed regional aviation weather and hazard information. && .PRELIMINARY POINT TEMPS/POPS... GTF 49 80 51 89 / 20 0 0 0 CTB 46 77 49 86 / 20 0 0 0 HLN 51 80 52 90 / 0 0 0 0 BZN 46 80 46 93 / 10 0 0 0 WYS 37 74 34 84 / 20 0 0 0 DLN 44 77 46 89 / 0 0 0 0 HVR 50 79 49 90 / 30 0 0 0 LWT 47 73 48 84 / 10 0 0 0 && .TFX WATCHES/WARNINGS/ADVISORIES... None. && $$ http://www.weather.gov/greatfalls