Severe Thunderstorm Warning Issued for Broadwater and Jefferson Counties, MT
This alert is no longer in effect.
NOAA issued it on May 21, 2026, 3 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Great Falls has issued a Severe Thunderstorm Warning for Broadwater and Jefferson counties in southwestern Montana until 3:45 PM MDT.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Broadwater and Jefferson Counties, MT
- Issued
- May 21, 2026
- Issuing authority
- NWS Great Falls MT
Storm notices can cover different combinations of wind, hail, lightning, and rainfall. Use the original notice for the hazards and boundaries attached to this specific record.
Record status: historical. It was issued 3 months ago; use the issuing agency's live warning service for current conditions in Broadwater and Jefferson Counties, MT.
Alert Details
A Severe Thunderstorm Warning was issued by the National Weather Service in Great Falls, MT. The alert is effective from 2:59 PM MDT on May 13, 2026, until 3:45 PM MDT on May 13, 2026.
Affected Areas
The warning covers Broadwater County and Jefferson County in southwestern Montana. Locations impacted include Townsend, Boulder, Whitehall, Montana City, Toston, Basin, Wickes, Alhambra, Corbin, Elkhorn State Park, Cardwell, Winston, Radersburg, Elk Park, Clancy, Silos, and Jefferson City.
What You Should Do
For your protection, move to an interior room on the lowest floor of a building.
Expected Conditions
At 2:58 PM MDT, a severe thunderstorm was located 17 miles northeast of Whitehall, or 19 miles southeast of Boulder, moving northeast at 45 mph. Hazards include 60 mph wind gusts and hail up to 0.75 inches. Expect damage to roofs, siding, and trees.
Timeline
The alert is in effect until 3:45 PM MDT on May 13, 2026.
Original source: NOAA Official Notice ↗
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Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (960 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to May 21, 2026.
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