Alert archive / Montana / Red Flag Warnings / 2026
Red Flag Warnings in Montana, May 2026
10 red flag warnings in May 2026. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of red flag warnings reaches back to 2005.
Red Flag Warnings by county
Each county as a circle sized by its count in May 2026. Tap one for its archive.
- Red Flag Warnings
- 10
- Busiest day
- May 12, 20263 red flag warnings
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 2, 12:36 PM MDT | Red Flag Warning | GGW | Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 3 more | 32 hr |
| May 7, 10:57 PM MDT | Red Flag Warning | GGW | Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 3 more | 21 hr |
| May 10, 12:02 PM MDT | Red Flag Warning | BYZ | Carter, Custer, Fallon, Rosebud, Treasure | 32 hr |
| May 10, 12:10 PM MDT | Red Flag Warning | GGW | Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more | 32 hr |
| May 12, 10:38 AM MDT | Red Flag Warning | MSO | Beaverhead, Deer Lodge, Granite, Jefferson, Madison, Powell and 1 more | 34 hr |
| May 12, 12:01 PM MDT | Red Flag Warning | GGW | Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more | 3 days |
| May 12, 12:59 PM MDT | Red Flag Warning | TFX | Blaine, Hill, Phillips | 32 hr |
| May 24, 9:45 PM MDT | Red Flag Warning | GGW | Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 3 more | 47 hr |
| May 25, 9:49 PM MDT | Red Flag Warning | GGW | Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 3 more | 48 hr |
| May 26, 10:07 PM MDT | Red Flag Warning | GGW | Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 3 more | 48 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Daniels County7
- Dawson County7
- McCone County7
- Prairie County7
- Richland County7
- Roosevelt County7
- Sheridan County7
- Valley County7
- Wibaux County7
- Phillips County3
- Garfield County2
- Petroleum County2
- Carter County1
- Custer County1
- Fallon County1
- Rosebud County1
- Treasure County1
- Beaverhead County1
- Deer Lodge County1
- Granite County1
- Jefferson County1
- Madison County1
- Powell County1
- Silver Bow County1
- Blaine County1
- Hill County1
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.