Non-severe | Hail < 1.9 cm (3/4 in) diameter |
Winds < 55 kts ( ≍ 28.29 m s − 1) no tornado | |
Severe | Hail cm diameter |
Winds kts ( ≍ 28.29 m s − 1) and < 65 kts ( ≍ 33.44 m s − 1) or tornado | |
Significant | Hail cm (2 in) diameter |
non-tornadic | Winds kts ( ≍ 33.44 m s − 1) |
Significant | Same as significant non − tornadic with F2 (or greater) tornado. |
tornadic |