Severe Thunderstorm Warning Issued for Sweet Grass County, 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This alert is no longer in effect.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 Billings has issued a Severe Thunderstorm Warning for Sweet Grass County until 7:30 PM MDT due to a storm producing 60 mph wind gusts.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Sweet Grass County, MT
- Issued
- May 21, 2026
- Issuing authority
- NWS Billings 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 Sweet Grass County, MT.
Alert Details
A Severe Thunderstorm Warning was issued by the National Weather Service in Billings, MT. The alert is effective from May 13 at 6:31 PM MDT until May 13 at 7:30 PM MDT.
Affected Areas
The warning covers Sweet Grass County in south central Montana. Locations impacted include Big Timber, Greycliff, and Melville.
What You Should Do
Seek shelter inside a well-built structure and stay away from windows. Do not wait for the sound of thunder before taking cover.
Expected Conditions
At 6:31 PM MDT, a severe thunderstorm was located over Big Timber moving northeast at 35 mph. Radar indicated 60 mph wind gusts capable of damaging roofs, siding, and trees. Wind damage is expected before any rain or lightning.
Timeline
The warning is in effect from May 13 at 6:31 PM MDT and expires at 7:30 PM MDT the same day.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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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 (842 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to May 21, 2026.
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