Heavy Rain — Granite, Montana

2008-08-09 · near Bearmouth, Granite, Montana

Event narrative

National Weather Service employee reported that heavy rainfall from a thunderstorms caused a rock and debris slide with some overwash onto the frontage road near Bearmouth Lodge.

Wider weather episode

A cold front pushed over Western Montana on the afternoon and evening of 08/09/2008. Strong shear, instability and good upper level jet support provided a good thunderstorm environment and resulted in several storms producing hail and thunderstorm wind damage.

View location on OpenStreetMap → (46.7000, -113.2989)

Source: NOAA Storm Events Database, event_id 128472. Narrative written by the NWS forecast office that issued the report.