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F0 tornado in Mason County, Illinois

Tornado August 18, 2001 · Mason County, Illinois

F0
Rating
0.1 mi
Path length
25 yd
Path width
EF0EF1EF2EF3EF4EF5Unrated

NOAA recorded where this tornado touched down but not where it lifted, so it appears as a point. Other tornadoes recorded nearby that day are shown faint.

What F0 means. This tornado was rated on Fujita’s original scale, used until 2007. F0 meant light damage: shingles and siding peeled, gutters torn, branches broken; the scale paired it with winds of 40–72 mph, figures later judged too high, especially toward the top of the scale, and revised downward in the Enhanced Fujita scale. Ratings then, as now, came from the damage.

What the National Weather Service wrote

A tornado briefly touched down 5.3 miles north of Mason City. It ripped off a large top of a tree and carried it 100 feet. One small tree was snapped. All gutters on a house were lifted off, as well as a table being blown into a open garage door (facing south). A door on the house was also blown open with the air moving through the attic in the house breaking out some windows. A small shed nearby was intact. Fire officials about 1.5 miles south of the house saw swirling clouds over the house's location. No injuries were reported.

Began near Mason City (40.2833, -89.7000).

Other tornadoes from the same storm system

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

F0 De Witt CountyF0 Champaign CountyF0 Champaign County

Source: NOAA Storm Events Database, event 5266344. Narratives are written by the National Weather Service forecast office that issued the report.

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