Montana Severe Severe Thunderstorm Warning | Effective 07/18/2026 16:19

Headline: 
Severe Thunderstorm Warning issued July 18 at 5:19PM MDT until July 18 at 5:45PM MDT by NWS Great Falls MT
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
July 18, 2026 - 4:19pm
Expires: 
July 18, 2026 - 4:45pm
Description: 
At 519 PM MDT, a severe thunderstorm was located 9 miles north of Wolf Creek, or 19 miles southwest of Cascade, moving northeast at 25 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... Tower Rock State Park and Craig.
Instruction: 
For your protection move to an interior room on the lowest floor of a building. Frequent lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning.
Area Description: 
Cascade, MT; Lewis and Clark, MT
Forcast Office: 
NWS Great Falls MT