Thunderstorm Wind — Powell, Montana

2016-06-08 · near Avon, Powell, Montana

52 MG

Magnitude

Event narrative

The Montana DOT weather sensor north of Avon, MT reported a gust of 60 mph between 9:38pm MDT and 9:45pm MDT. Sustained winds at this time were 49 mph.

Wider weather episode

The Northern Rockies were under southwest flow ahead of a large low pressure system off the West Coast. A shortwave trough and associated jet streak were moving through the southwest flow providing upper level forcing for thunderstorms. Precipitable water values ranged from 0.75 to 1.00 inches, with deep shear of 50 kts, and CAPE values of 500 to 1000 J/kg. Short range models highlighted long-lived storm modes over the area. A convective watch was issued around 3 pm MDT highlighting an atmosphere favorable for strong thunderstorm development.

View location on OpenStreetMap → (46.7202, -112.6675)

Source: NOAA Storm Events Database, event_id 644887. Narrative written by the NWS forecast office that issued the report.