A potent disturbance embedded in a southwest flow aloft produced strong thunderstorms which moved across east-central Utah. These storms produced heavy rain in a short amount of time which fell on saturated soils and led to some flash flooding.
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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 GJT wrote it up.
A potent disturbance embedded in a southwest flow aloft produced strong thunderstorms which moved across east-central Utah. These storms produced heavy rain in a short amount of time which fell on saturated soils and led to some flash flooding.
The Grand Junction radar (KGJX), 126 km away, was scanning. The volume nearest the first event began at 14:16 UTC.
1 debris flow, 1 flash flood. Local standard time, as filed.
Heavy rainfall resulted in a rockslide with other debris that fell down onto Highway 128 and closed the road for about an hour.
A flash flood due to heavy rainfall came down through Arches National Park and across the Delicate Arch Road. The flowing water that was up to four feet deep closed the road for over an hour.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2018Every state in 2018This day in weather historyWarnings in Utah, October 2018
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: 789234, 789233.