Special Weather Statement for Upper Blackfoot and MacDonald Pass; Helena Valley; Elkhorn and Boulder Mountains
Official alert fields
What you need to know
- Effective
- Ended
- Official severity
- Moderate
- Official urgency
- Expected
- Official certainty
- Observed
What is happening
At 503 PM MDT, Doppler radar was tracking a cluster of strong thunderstorms 8 miles southwest of Helena, moving northeast at 15 mph. HAZARD...Wind gusts of 50 to 55 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage...
What the bulletin says to do
If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with this storm and may lead to localized flooding. Do not drive your vehicle through flooded roadways. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service.
Full official description
Bulletin details
At 503 PM MDT, Doppler radar was tracking a cluster of strong thunderstorms 8 miles southwest of Helena, moving northeast at 15 mph. HAZARD...Wind gusts of 50 to 55 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Helena, East Helena, Montana City, Rimini, Alhambra, Spring Meadow Lake State Park, and Clancy.
Lifecycle record
Official revisions
- Alert
Special Weather Statement issued August 22 at 5:03PM MDT by NWS Great Falls MT
Official revision
Source and limitations
Publisher: Weather Alert Watch. Primary source: NWS Great Falls MT. This page reorganizes official fields and does not add a forecast or expand the affected area.
- CAP status
- Actual
- Message type
- Alert
- Last collected