Thunderstorm Wind — Madison, Montana

2021-07-07 · near Ennis Big Sky Arpt, Madison, Montana

Event narrative

KEKS measured a 56 kt (64 mph) thunderstorm wind gust.

Wider weather episode

A shortwave trough over the Pacific Northwest began to compromise the ridge in place and introduced a more moist and unstable southwesterly flow to the Northern Rockies. This allowed daily rounds of afternoon and evening showers and thunderstorms to develop over Southwest and North-central MT. The period began with discrete supercell thunderstorms developing over the plains, producing severe wind gusts, large hail, and even a weak tornado. The strongest and most widespread activity occurred on July 7th as the Pacific trough and associated wind shear began to exert more of an influence on the region's weather and interacted with the moist and unstable environment already in place.

View location on OpenStreetMap → (45.2700, -111.6300)

Source: NOAA Storm Events Database, event_id 964930. Narrative written by the NWS forecast office that issued the report.