The scale was mainly a damage scale
however there was a path length and width included with it.
F0
Gale Tornado
(40 - 72 mph)
F1
Moderate Tornado
(73 - 112 mph)
F2
Significant Tornado
(113 - 157 mph)
F3
Severe Tornado
(158 - 206 mph)
F4
Devastating Tornado
(207 - 260 mph)
F5
Incredible Tornado
(261 - 318 mph)
F6
Inconceivable Tornado
(319 - 379 mph)
F7
?
(380 - 440 mph)
F8-F12
?
(441 - 812+ mph)
----------------------------------------------------------
P0
PATH length
0.3-0.9 miles
P1
PATH length
1.0-3.1 miles
P2
PATH length
3.2-9.9 miles
P3
PATH length
10-31 miles
P4
PATH length
32-99 miles
P5
PATH length
100-315 miles
P6
PATH length
316+ miles
----------------------------------------------------------
P0
PATH width
6-17 yards
P1
PATH width
18-55 yards
P2
PATH width
56-175 yards
P3
PATH width
176-566 yards
P4
PATH width
0.3-0.9 miles
P5
PATH width
1.0-3.1 miles
P6
PATH width
3.2-9.9 miles
P7
PATH width
10-31 miles
P8
PATH width
32-99 miles
P9
PATH width
100-315 miles
Info about this can be found here
