Severe Thunderstorm Warning issued September 13 at 9:57PM MDT until September 13 at 10:15PM MDT by NWS Great Falls MT
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At 956 PM MDT, a severe thunderstorm was located 9 miles northeast of
Geyser, moving northeast at 40 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
This severe thunderstorm will remain over mainly rural areas of north
central Judith Basin and south central Chouteau Counties.
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For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.