infoname.gif 8.1 K
84,000 Links - 841 Pages
Tornado Intensity Scale
The Info Service Chart & Reference Guide


PURPLEf.gif 1.1 K

Scale Strength Max Wind Speed Description
F0 Weak

(Gale)
<73 mph Damage to tree branches.
F1 Weak

(Moderate)
73-112 Roofing materials peeled off, mobile homes pushed off foundations or overturned, moving automobiles pushed off road.
F2 Strong

(Significant)
113-157 Roofs torn off wood-frame homes, mobile homes demolished, railroad boxcars pushed over, large trees uprooted or snapped-off.
F3 Strong

(Severe)
158-206 Roofs and some walls torn off well-built wood-frame homes, locomotives over-turned, most trees in forested areas up rooted, automobiles lifted and moved.
F4 Violent

(Devastating)
207-260 Well-built homes leveled, automobilies thrown about, heavy objects become missiles.
F5 Violent

(Incredible)
261-318 Structures are lifted off foundations and carried away, reinforced concrete structures damages. Less than 2% of all tornadoes reach this intensity.
F6 n/a 319-380 Not expected to occur on Earth.

PURPLEf.gif 1.1 K



Information, News, Links

[E-Mail] - [Top of Page] - [Main Index] - [Super Sites] - [Our Awards]

© Copyright 1995 - 2014 - The Info Service