Flash Flood — Sweet Grass, Montana

2023-06-06 · near Greycliff, Sweet Grass, Montana

Event narrative

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

Wider weather episode

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.

View location on OpenStreetMap → (45.8384, -109.7802)

Source: NOAA Storm Events Database, event_id 1097138. Narrative written by the NWS forecast office that issued the report.