Margusity reported a classification for thunderstorm severity.
Parameters:
(1) tornadoes (Expanded Fujita)
(2) hail
(3) wind speed in mph
(4) lightning strike per 5 minute interval
(5) rainfall in inches per hour
(6) damage
Parameter
Grade TS1 (weak)
Grade TS2 (moderate)
Grade TS3 (heavy)
tornado
no
EF0 possible
hail
<= 0.75 in
wind speed
< 25 mph
25 to 40
41 to 57
lightning strike
none to rare
<= 10
10 to 20
rainfall
<= 0.1
0.10 to 0.25
0.25 to 0.55
damage
none
little
minor, street flood, lightning strike
Grade TS4 (intense)
Grade TS5 (extreme)
EF1 to EF2
EF3 or greater
0.76 to 1.50 in
> 1.50 inch
58 to 70
> 70
20 to 30
> 30
0.55 to 1.25
> 1.25
moderate
significant and widespread
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Specialty: Emergency Medicine
