National Weather Service United States Department of Commerce

Snow and Record Cold Temperatures

A strong cold front will move through the center of the country early this week. Moderate to heavy snow is possible today in the Central Rockies to northern Plains. Snow will spread into the Midwest on tomorrow. Cold air behind the front will result in record cold temperatures. Showers and storms across Florida today and tomorrow will result in a threat of flash flooding. Read More >

Fujita Tornado Damage Scale
Developed in 1971 by T. Theodore Fujita of the University of Chicago


F0 Gale Tornado

     Winds 40 to 73 mph, producing light damage.  Some damage to chimneys; branches broken off trees; shallow-rooted trees pushed over; sign boards damaged. Account for 70% of South Florida tornadoes, yet only result in 5% of tornado casualties (injuries and/or fatalities).

This F0 tornado damaged the roof of a mobile home in Carol City on October 29, 2003.

F1 Moderate Tornado

     Winds 73 to 112 mph, producing moderate damage. Peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos blown off roads. Account for 22% of South Florida tornadoes and 20% of tornado casualties (injuries and/or fatalities).

This F1 tornado significantly damaged over 100 mobile homes on August 7, 2003 in Palm Beach Gardens.
F2 Significant Tornado

     Winds 113 to 157 mph, producing considerable damage. Roofs torn off frame houses; mobile homes demolished; boxcars overturned; large trees snapped or uprooted; light-object missiles generated; cars lifted off ground. Account for 8% of South Florida tornadoes and 31% of tornado casualties (injuries and/or fatalities).

This damage in New Smyrna Beach was representative of F2 tornado damage.
F3 Severe Tornado

     Winds 158 to 206 mph, producing severe damage. Roofs and some walls torn off well-constructed houses; trains overturned; most trees in forest uprooted; heavy cars lifted off the ground and thrown. Account for 1% of South Florida tornadoes and 44% of tornado casualties (injuries and/or fatalities).

This tornado damage was representative of F3 damage in New Smyrna Beach.
F4 Devastating Tornado

     Winds 207 to 260 mph, producing devastating damage. Well-constructed houses leveled; structures with weak foundations blown away some distance; cars thrown and large missles generated. No F4 tornado has occurred in South Florida.

This F4 damage was from the Moore, Oklahoma tornado of May 3, 1999.
F5 Incredible Tornado

     Winds 261 to 318 mph, producing incredible damage. Strong frame houses leveled off foundations and swept away; automobile sized missiles fly through the air in excess of 100 meters (109 yds); trees debarked; incredible phenomena will occur. No F5 tornado has occurred in Florida.

This F5 damage was from the Moore, Oklahoma tornado of May 3, 1999.