In the early evening hours of July 19th, Severe Thunderstorm Watch 605 was issued in anticipation of severe thunderstorms developing in the vicinity of a low level moisture convergence axis and an approaching mid level short wave trough. In addition, strong diabatic heating and cold air advection aloft produced steep mid-level lapse rates which resulted in destabilization of the atmosphere.
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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 BIS wrote it up.
In the early evening hours of July 19th, Severe Thunderstorm Watch 605 was issued in anticipation of severe thunderstorms developing in the vicinity of a low level moisture convergence axis and an approaching mid level short wave trough. In addition, strong diabatic heating and cold air advection aloft produced steep mid-level lapse rates which resulted in destabilization of the atmosphere. Several severe thunderstorm warnings were issued. Several reports of large hail and one report of a severe thunderstorm wind gust were received during the evening hours.
The Bismarck radar (KBIS), 169 km away, was scanning. The volume nearest the first event began at 00:24 UTC.
4 hail, 1 thunderstorm wind. Local standard time, as filed.
A trained spotter reported an estimated severe thunderstorm wind gust of 60 mph.
No damage was reported.
No damage was reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Dakota in 2009Every state in 2009This day in weather historyWarnings in North Dakota, July 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 2026-09-30. Each event’s entry at NCEI: 187336, 187337, 187340, 187341, 187342.