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EF1 tornado in Howell County, Missouri

Tornado April 30, 2010 · Howell County, Missouri

EF1

Rating

2.7 mi

Path length

1,320 yd

Path width

$750K

Damage as recorded

$25K

Crop damage

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 1,320 yards (0.75 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

An EF-1 tornado with maximum winds of 110 mph produced moderate to severe damage to several homes and a restrurant located near the intersection of Missouri Highways 60 and 63 (Hillbilly Junction). Severe damage also occurred at the Willow Springs water treatment plant. The path width varied between a quarter and three quarters of a mile.

The wider storm

An approaching shortwave trough and accompanying surface low tracked northeast of Arkansas and into southern Missouri. A modest instability and high shear environment with very moist airmass supported widespread convection and a few supercells. A tornadic supercell tracked northeast from north central Arkansas through Ozark and Howell counties in Missouri producing five tornadoes.

Began near Burnham (36.9447, -91.9653).

Other tornadoes from the same storm system

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

EF1 Ozark County EF1 Ozark County

Source: NOAA Storm Events Database, event 226359. Narratives are written by the National Weather Service forecast office that issued the report.

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