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The May 4, 1977 tornado

F4Webster County, Iowa

An F4 tornado on a 2.0-mile path that injured 14. It was one of 30 tornadoes recorded in the U.S. that day, 9 of them rated F3/EF3 or stronger.

Watch how it happened Part of the outbreak of May 4, 1977: 30 tornadoes in 6 states

F4 tornado · May 4, 1977

How it happened

Follow the tornado’s recorded path from touchdown to lift-off.

About this replay

Distance travelled—Historical replay — even pace

Distance—of 2.0 miles

Now in—

RatingF4

The tornado

Rating: F4; Fujita scale
Path length: 2.0 mi; Width up to 70 yards
Killed: 0; Along the whole path
Injured: 14; Along the whole path
Date and time: Wednesday, May 4, 1977; 6:32 PM CST
That day: 30; tornadoes in the U.S.; every one, with a replay of the day

Counties on its path

Webster CountyIA

Other notable tornadoes that day

F4, Jackson County12 mi
F4, Ray County48.6 mi

Storm Prediction Center severe weather database. Path drawn as a straight line from the recorded start to end point.