A few thunderstorms developed across the Billings Forecast Area during the afternoon and early evening of the 16th. Due to large temperature-dewpoint spreads, the main impact from these thunderstorms was very strong wind gusts which resulted in some isolated damage.
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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 BYZ wrote it up.
A few thunderstorms developed across the Billings Forecast Area during the afternoon and early evening of the 16th. Due to large temperature-dewpoint spreads, the main impact from these thunderstorms was very strong wind gusts which resulted in some isolated damage.
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 Billings, MT wrote its last area forecast discussion before the first event at Jul 15, 8:22 PM MST, 4 hours 16 minutes earlier.
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</html>The Glasgow radar (KGGW), 209 km away, was scanning. The volume nearest the first event began at 07:37 UTC.
7 thunderstorm wind, 1 hail. Local standard time, as filed.
Wind damage occurred in the vicinity of Garry Owen/Spotted Eagle Roads, including a downed power line and downed trees. A few sheds were blown apart and a roof was blown off a shed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2017Every state in 2017This day in weather historyWarnings in Montana, July 2017
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 2026-10-01. Each event’s entry at NCEI: 703033, 703023, 703021, 703016, 703013, 703011, 703008, 703007.