2 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 national radar mosaic for the moment the first event began.
2 flash flood. Local standard time, as filed.
A slow moving thunderstorm with heavy rain produced water up to a foot deep 6 miles east of Harlowton on Highway 12.
A slow moving thunderstorm with heavy rain caused water to run over roads on the east end of Roundup. Over one inch of rain fell during a ten minute period. The Roundup Tribune reported that several basements were flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 1998Every state in 1998This day in weather historyWarnings in Montana, July 1998
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: 5658057, 5658058.