EF1 tornado in Delaware County, Iowa
Tornado March 31, 2023 · Delaware County, Iowa
The path drawn at its surveyed width of 50 yards (0.03 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.
What the National Weather Service wrote
An EF1 tornado moved from 3 miles southwest of Manchester through the southeast part of town. This tornado damaged to structures and trees along its path, with estimated peak winds around 110 mph.
The wider storm
A very strong system developed on the morning of March 31st and tracked across the state of Iowa. This system pulled unseasonably warm and moist air into the Midwest, which combined with a very favorable wind profile to create a volatile environment for severe thunderstorms. Discrete supercell thunderstorms occurred initially, but quickly transitioned into a QLCS mode. This system produced a historic tornado outbreak for the area, with a record 29 tornadoes on the day, including 13 rated EF-2, 1 rated EF-3, and 1 rated EF-4. This was the first EF-4 tornado in the NWS Quad Cities service area since 1995. 11 injuries were reported, with no known fatalities. In addition to the numerous tornadoes, there were many large hail and damaging wind reports. Maximum straight line thunderstorm winds were estimated at 80 to 90 mph.
Began near Manchester (42.4420, -91.4990).
Other tornadoes from the same storm system
18 more tornadoes the National Weather Service filed under this storm episode.
Source: NOAA Storm Events Database, event 1087051. Narratives are written by the National Weather Service forecast office that issued the report.
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