Alert archive / Montana / Custer County / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Custer County, Montana, 2026

18 severe thunderstorm warnings in 2026. An alert counts here when it covered this county. The archive of severe thunderstorm warnings reaches back to 1986.

Custer County and its neighbors

Each county as a circle sized by its count in 2026. Tap one for its archive.

Severe Thunderstorm Warnings
18
Busiest month
June7 severe thunderstorm warnings
Busiest day
June 27, 20265 severe thunderstorm warnings

Over time

By month

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.

IssuedProductOfficeLasted
May 30, 6:32 PM MDTSevere Thunderstorm WarningBYZ42 min
May 30, 7:19 PM MDTSevere Thunderstorm WarningBYZ41 min
Jun 7, 3:38 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ49 min
Jun 7, 5:16 PM MDTSevere Thunderstorm WarningBYZ59 min
Jun 26, 8:14 PM MDTSevere Thunderstorm WarningBYZ46 min
Jun 27, 4:38 PM MDTSevere Thunderstorm WarningBYZ31 min
Jun 27, 4:52 PM MDTSevere Thunderstorm WarningBYZ38 min
Jun 27, 5:08 PM MDTSevere Thunderstorm WarningBYZ18 min
Jun 27, 5:25 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ65 min
Jul 2, 9:11 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ49 min
Jul 3, 4:52 PM MDTSevere Thunderstorm WarningBYZ32 min
Aug 17, 5:16 PM MDTSevere Thunderstorm WarningBYZ44 min
Aug 17, 6:25 PM MDTSevere Thunderstorm WarningBYZ50 min
Aug 17, 7:03 PM MDTSevere Thunderstorm WarningBYZ42 min
Aug 18, 3:04 PM MDTSevere Thunderstorm WarningBYZ56 min
Aug 18, 3:52 PM MDTSevere Thunderstorm WarningBYZ38 min
Aug 18, 4:27 PM MDTSevere Thunderstorm WarningBYZ21 min
Sep 2, 6:46 PM MDTSevere Thunderstorm WarningBYZ34 min

The busiest days

Days with the most alerts issued, by UTC date.

  1. June 27, 20265severe thunderstorm warnings
  2. August 18, 20265severe thunderstorm warnings
  3. May 31, 20262severe thunderstorm warnings
  4. June 7, 20262severe thunderstorm warnings
  5. July 3, 20262severe thunderstorm warnings
  6. August 17, 20261severe thunderstorm warnings
  7. September 3, 20261severe thunderstorm warnings

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive2025

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.