EF1 tornado — Rock Island County, Illinois

EF1 tornado in Rock Island County, Illinois

Tornado April 4, 2023 · Rock Island County, Illinois

EF1

Rating

1.1 mi

Path length

25 yd

Path width

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 25 yards (0.01 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

A brief tornado caused sporadic damage to power poles, some trees, and some houses on its 1 mile path. Estimated max wind speeds of 105 mph.

The wider storm

There were two rounds of severe thunderstorms on April 4th. The first round in Illinois occurred during the morning hours. These storms developed in eastern Iowa and moved into northwest Illinois by mid morning. Despite the elevated nature of the storms and a very stable low level, a very strong downdraft surge occurred south of the hail core over the Illinois side of the Quad Cities metro, with the Quad City Airport ASOS measuring a wind gust near 90 MPH. Extensive damage occurred from Rock Island to Colona IL to buildings, trees and power poles, with some structures seeing ripped-off roofs. A survey team determined a brief tornadoes touched down in Moline, Colona, and near Geneseo Illinois.

Other tornadoes from the same storm system

Source: NOAA Storm Events Database, event 1092537. Narratives are written by the National Weather Service forecast office that issued the report.

EF1 tornado in Rock Island County, Illinois

What the National Weather Service wrote

The wider storm

Other tornadoes from the same storm system

Tornadoes near your address