An isolated supercell thunderstorm moved southeast through the area.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GGW wrote it up.
An isolated supercell thunderstorm moved southeast through the area.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Glasgow, MT wrote its last area forecast discussion before the first event at Jun 29, 3:30 PM MST, 1 hour 17 minutes earlier.
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</html>The Glasgow radar (KGGW), 139 km away, was scanning. The volume nearest the first event began at 23:45 UTC.
3 hail. Local standard time, as filed.
Mostly dime-sized hail with some quarter-sized hail. Reported at the Port of Whitetail.
Size is estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2009Every state in 2009This day in weather historyWarnings in Montana, June 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 174298, 174302, 174309.