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EF4 tornado in Madison County, Iowa

Tornado March 5, 2022 · Madison County, Iowa

EF4
Rating
70.6 mi
Whole path
900 yd
Path width
6
Deaths
5
Injuries
$220.0M
Damage as recorded

NOAA records this tornado county by county. Its path ran through Madison County → Warren County → Polk County → Jasper County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 900 yards (0.51 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF4 means. On the Enhanced Fujita scale, EF4 is devastating damage: well-built houses levelled, consistent with estimated gusts of 166–200 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

This is the first segment of this devastating tornado which passed through four counties including Madison, Warren, Polk and Jasper. The tornado began northwest of Macksburg in western Madision county. The tornado remained in mostly rural cropland and wooded areas of western Madison county. The tornado passed through Pammel State Park southwest of Winterset producing extensive tree damage as the tornado continued to widen into a wedge tornado. Upon exiting the park, the tornado travelled along Carver Road. Several residential homes were extensively damaged or destroyed along Carver Road and six deaths occurred along this stretch of road. The tornado was at peak intensity at this time with EF4 damage occurring west of the intersection of Carver Road and Highway 169 with a house completely destoyed and removed from the foundation. After departing the Carver Road corridor, the tornado progressed just southeast of Winterset and eventually passed east of town and crossing State Highway 92. Damage in these areas was primarily to trees and outbuildings although a few homes were also impacted with mostly EF1 to EF2 damage. From Highway 92 to where the tornado exited the county, it remained mostly in rural cropland and wooded areas with numerous trees impacted. The tornado then moved into Warren county from Madison county.

The wider storm

On March 5, 2022 a total of 15 tornadoes occurred across the state of Iowa as a warm front lifted across the area. Supercells initially developed across southwest Iowa in the vicinity of the triple point of the surface low with strong, rotating updrafts. Longevity was initially lacking with the storms, producing funnel clouds, brief tornadoes, and hail in southwest Iowa. As the cells moved northeast and matured, larger hail began to fall with golf ball sized hail falling in Adams county and baseball sized hail into Adair county. Following this period of large hail the storms produced a tornado which would remain on the ground for just over 70 miles, carving a path across central Iowa from southwest of Winterset to just northeast of Newton. The tornado peaked in Winterset, Iowa, producing EF-4 damage with wind speeds estimated near 170 mph. The tornado continued across the southern portion of the Des Moines metro area and to Newton. This is the furthest north EF-4 tornado in the CONUS this early in the year on record, the first EF-4 tornado in Iowa since October 4, 2013 which occurred in Woodbury and Cherokee Counties, and is the second longest tornado in Iowa since 1980, behind the longest occurring on June 7, 1984 at a length of 117 miles across southern Iowa. As the storm skimmed the southern Des Moines metro, cells across south central became tornadic, producing several destructive tornadoes including an EF-3 tornado in Chariton, Iowa. This heartbreaking day resulted in seven fatalities, six in Winterset and one in Chariton, making it the deadliest tornado outbreak in Iowa since 2008. At 15 tornadoes, this is also one of the earliest outbreaks of this magnitude to occur so early in the season.

Began near Macksburg (41.2334, -94.2013).

Other tornadoes from the same storm system

7 more tornadoes the National Weather Service filed under this storm episode.

Source: NOAA Storm Events Database, event 1007076. Narratives are written by the National Weather Service forecast office that issued the report.

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