What is the difference between the fujita scale and the enhanced fujita scale??

Question

What is the difference between the fujita scale and the enhanced fujita scale??

Answer 1

It lowered the winds.  The previous F4 had higher winds than the EF 4 today.  You will start seeing more EF 5 tornadoes now, because of the lowering of the winds, but don't be alarmed.  Before, an F5 had to have winds around 260 mph, now an EF 5 just has to be over 200 mph.

Answer 2

The Enhanced Fujita scale is basically an upgrade of the original Fujita scale. In coordination with the SPC, NWS and the NSSL, decided to upgrade it to base it on the amount of damage to different structures instead of actual wind speed. Some examples of objects ranging from wood frame homes to brick homes, to malls, churches, well built steel buildings.

EF-0 65-85 mph light damage will occur. Roofs damaged or missing, trees uprooted, very weak structures damaged.

EF-1 86–110 mph Extensive roof damage, cars can be tossed, outside walls can collapse.

EF-2 111–135 mph Weak homes can be severely damaged, roofs completely missing, cars tossed for many yards.

EF-3 136–165 mph Entire stories of well-constructed houses destroyed, severe damage to large buildings, heavy cars can be lifted off the ground and thrown, structures with weak foundations can be blown away.

EF-4 166–200 mph Well-constructed houses and whole frame houses completely leveled. Major damaged to larger buildings.

EF-5 >200 mph Strong frame houses leveled off foundations and swept away; high-rise buildings have significant structural deformation. Not likely to survive if not underground.

Answer 3

The Enhanced Fujita Scale, or EF Scale, is the scale for rating the strength of tornadoes in the United States estimated via the damage they cause.

Implemented in place of the Fujita scale introduced in 1971 by Ted Fujita, it began operational use on February 1, 2007. The scale has the same basic design as the original Fujita scale, six categories from zero to five representing increasing degrees of damage. It was revised to reflect better examinations of tornado damage surveys, so as to align wind speeds more closely with associated storm damage. Better standardizing and elucidating what was previously subjective and ambiguous, it also adds more types of structures as well as vegetation, expands degrees of damage, and better accounts for variables such as differences in construction quality.