Heavy Rain and Flash Flooding Concerns in California; Heavy Snow in the Sierra

An atmospheric river will bring heavy rainfall to lower elevations of California this week, and heavy snow to the Sierra Nevada mountains. Flash flooding, some of which may be locally considerable, will be a concern on the western foothills of the Sierra Nevada mountains through Tuesday. Landslides, rockfalls and mudslides are possible in the Southern California mountains. Read More >

Overview

An isolated supercell developed along a warm front and remained nearly stationary during the early evening hours on Thursday, June 20, 2024. The supercell impacted areas south of Highway 20 from Ainsworth to Long Pine. The supercell produced at least two brief tornadoes.

Tornado
Photo

Tornadoes:

Tornado - 10.3 Miles S of Ainsworth
Brown County

Date	6/20/2024
Time (Local)	0521 PM CDT
EF Rating	EF-1
Est. Peak Winds	101 MPH
Path Length	0.4 Miles
Max Width	50 Yards
Injuries/Deaths	0
Summary: This tornado impacted a farmstead north of Hofeld Lake. The tornado traveled through a wetland that is now flooded due to heavy rainfall. Damage was observed to a single wide home and several outbuildings.

Track Map

Tornado - 7 Miles South of Long Pine
Brown County

Date	6/20/2024
Time (Local)	5:47 PM CDT
EF Rating	EF-1
Est. Peak Winds	94 MPH
Path Length	0.1 miles
Max Width	50 Yards
Injuries/Deaths	0
Summary: This tornado remained over open terrain of far eastern Brown County. Damage to trees was observed due to the tornado. This tornado was observed by several storm spotters and storm chasers before becoming rain wrapped.

Track Map

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0 Weak 65-85 mph	EF1 Moderate 86-110 mph	EF2 Significant 111-135 mph	EF3 Severe 136-165 mph	EF4 Extreme 166-200 mph	EF5 Catastrophic 200+ mph

Photo

Picture of rain wrapped tornado south of Ainsworth
Photo Credit: Connor Croff

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Heavy Rain and Flash Flooding Concerns in California; Heavy Snow in the Sierra

June 20, 2024 Brown County Tornadoes