Severe · Flood WatchActive alert

Flood Watch issued September 18 at 10:39AM MDT until September 19 at

Affecting Helena Valley; Meagher County Valleys; Canyon Ferry Area

In effect until: Sep 19, 2026, 12:00 PM

Helena Valley; Meagher County Valleys; Canyon Ferry Area

Possible impact zone; conditions develop through 12:00 PM.

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

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Read the original bulletin (official text)

* WHAT...Flooding caused by excessive rainfall is possible.

* WHERE...The Canyon Ferry Area, Helena Valley, and Meagher County
Valleys in Central Montana

* WHEN...From 6 PM MDT this evening through Saturday afternoon.

* IMPACTS...Excessive runoff may result in flooding of low-lying and
flood-prone locations.

* ADDITIONAL DETAILS...
- Showers and thunderstorms capable of producing hourly rainfall
rates of between 0.25 inch to 0.5 inch are possible.
- Some locations impacted include Helena, Townsend, and White
Sulphur Springs
- http://www.weather.gov/safety/flood

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Flood Watch issued September 18 at 10:39AM MDT until September 19 at

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