Hail in Flathead County, Montana
Hail August 29, 2013 · Flathead County, Montana
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
A trained spotter northwest of Kalispell reported strong winds with penny size hail.
The wider storm
As an upper level low approached the Pacific Northwest coast, a mid-level jet maximum of 40 to 50 knots triggered a line of thunderstorms that moved from eastern Oregon into the Idaho Panhandle. As this line continued to track east-northeast, they formed a gust front triggering even stronger storms over western Montana that brought strong gusty winds, frequent lightning, heavy rain and damage. The lightning detection network reported over 1500 strikes during the event.
Began near Kalispell (48.2921, -114.4583).
Source: NOAA Storm Events Database, event 473545. Narratives are written by the National Weather Service forecast office that issued the report.
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