Flash Flood in Sweet Grass County, Montana

Flash Flood June 6, 2023 · Sweet Grass County, Montana

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

What the National Weather Service wrote

Water was reported over the roads along with an inch accumulation of pea size hail.

The wider storm

A very moist, easterly surface flow advected 50 to 60 degree dewpoints from the central plains into the Billings Forecast Area. In addition, atmospheric precipitable waters were well over 1.00. Steering winds were light resulting in slow-moving thunderstorms. Although some large hail occurred with a few thunderstorms, the main impact was heavy rain and flash flooding.

Began near Greycliff (45.8384, -109.7802).

Source: NOAA Storm Events Database, event 1097138. Narratives are written by the National Weather Service forecast office that issued the report.

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