This serves as a place holder for wildfire starts in late September.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS TFX wrote it up.
This serves as a place holder for wildfire starts in late September.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Great Falls, MT wrote its last area forecast discussion before the first event at Sep 28, 10:37 AM MST, 1 hour 46 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Great Falls MT 1137 AM MDT Sun Sep 28 2025 Aviation Section Updated. .KEY MESSAGES... - One more nice day today, before a slow change in the weather pattern begins on Monday. - Showers and thunderstorms will slowly increase in coverage area over North Central and Southwest MT from Monday through Wednesday. - Monday looks to be the warmest day this week, before a slow and steady cool down then occurs for the rest of the week. && .UPDATE... /Issued 808 AM MDT Sun Sep 28 2025/ A dry cold front continues to move through the plains this morning and will gradually weaken and fade out as it moves southward into the central MT island ranges. Other than a period of gusty winds and a slight cool down for northern areas, not expecting any significant impacts. - RCG && .DISCUSSION... /Issued 808 AM MDT Sun Sep 28 2025/ - Meteorological Overview: An upper level ridge of high pressure continues to build over MT. This will result in more more nice day over the CWA, with generally quiet conditions expected. By this evening, a few showers/thunderstorms could drift northward from Idaho into far Southwest MT, but the forecast models continue to decrease the probability for this occurring. Otherwise, on Monday, the upper level ridge starts to move eastward, as an upper level trof approaches the west coast. One more very warm afternoon is expected on Monday with the southwesterly flow. Additionally, showers/thunderstorms will try to develop over Western MT by the afternoon and then move eastward into the western portions of the CWA by Monday evening. The chance for showers/thunderstorms really start to increase though on Tuesday, as the upper level trof pushes further eastward. For Wednesday through Friday...expect cooler air to slowly move into the CWA each day. Afternoon temperatures will start to trend cooler and likely fall closer to normal by Friday. There will be small chances for precipitation during this period, as weak upper level pieces of energy move across the CWA. For next weekend, it is still looking like another upper level trof will move across MT. Additionally, below normal temperatures are also expected to accompany this disturbance, which could result in snow falling at higher elevations. - Forecast Confidence & Scenarios: The main concern early in the week is the thunderstorm potential, especially Monday night into Tuesday. Right now the main concern is lightning and wind gusts around 45 mph as the storms move through. For next weekend, the main concern will be how low the snow levels get, along with how much precipitation falls. The latest GFS model is not as cold as previous runs, thus snow levels are a bit higher. It also has reduced the expected precipitation a bit, with some of the higher totals coming in now ranging from about 0.50 to 1.00 inches. Overall, there is still quite a bit of uncertainty about snow levels/precipitation amounts for next weekend. Brusda && .AVIATION... 28/18Z TAF Period. VFR conditions prevail across the area through the period under a generally dry south to southwest flow aloft. Clear skies persist through tonight across most of the area while some mid to higher level clouds spread north into southwest MT this evening. There is a low (less than 20%) chance of a shower drifting north from ID into the KWYS vicinity. Northerly surface winds across the plains will decrease and turn to the east or southeast this evening with southerly surface winds developing across much of the area on Monday. Hoenisch && .PRELIMINARY POINT TEMPS/POPS... GTF 77 48 86 55 / 0 0 0 10 CTB 69 41 82 48 / 0 0 0 10 HLN 81 50 83 53 / 0 0 0 30 BZN 81 48 80 50 / 0 0 10 20 WYS 72 37 69 39 / 10 10 20 30 DLN 79 45 77 48 / 0 10 10 30 HVR 77 47 85 53 / 0 0 0 10 LWT 79 50 83 53 / 0 0 0 10 && .TFX WATCHES/WARNINGS/ADVISORIES... None. && http://www.weather.gov/greatfalls
The national radar mosaic for the moment the first event began.
1 wildfire. Local standard time, as filed.
The Hays Fire started during the afternoon on 9/28 4 miles north of Hays, MT. The fire quickly burned 747 acers of short grass before coming 100% later in the evening on 9/28. No damages were reported with the wildfire.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2025Every state in 2025This day in weather historyWarnings in Montana, September 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1289301.