Flash Flood in Pondera County, Montana

Flash Flood June 18, 2013 · Pondera County, Montana

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Multiple public calls about flash flooding due to thunderstorms in the area. Water was reported flowing over portions of Interstate 15 near Brady.

The wider storm

A low pressure system moved into the Pacific Northwest coast bringing a more moist, unstable, and southwesterly flow to the region. This helped generate showers and

thunderstorms over the higher terrain of these areas. The frontal boundary associated with this system moved into western Montana later in the day bringing the chance of severe thunderstorms, damaging winds, large hail, and heavy rainfall to the area. Thunderstorm activity decreased overnight.

Began near Brady (48.0505, -111.8606).

Source: NOAA Storm Events Database, event 454456. Narratives are written by the National Weather Service forecast office that issued the report.

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