2 flash flood, 1 thunderstorm wind, 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, 1 thunderstorm wind. Local standard time, as filed.
Heavy rain, up to 3 inches in an hour, caused flash flooding problems from Castle Rock to Parker. Interstate 25, north of Castle Rock, was closed as highwaters covered sections of the highway. Some cars were left floating in the floodwaters.
Damaging thunderstorm winds, estimated to be at least 80 mph (70 kts) knocked over several 70-foot ponderosa pines. A 10-foot cement wall was also blown over and a garage door blown in.
Torrential rain, between 3 and 5 inches, along with hail caused flooding and flash flooding across southern Lincoln County. Hail, up to 8 inches deep, covered the roadway just east of Karval. Snowplows had to the called out to clear the road. Portions of the roadway were impassable due to floodwaters. Flash flooding also occurred along State Highway 71, 10 miles northwest of Karval. The highway had to be closed until the floodwaters safely receded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 1998Every state in 1998This day in weather historyWarnings in Colorado, 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: 5662688, 5662690, 5662689.