| Speed (mph) |
Description |
|
25-31 |
Large branches in
motion; whistling heard in telephone wires |
| 32-38 |
Whole trees in motion;
inconvenience felt walking against wind |
| 39-54 |
Twigs break off trees; wind generally
impedes progress |
| 55-72 |
Damage to
chimneys and TV antenna; pushes over shallow rooted trees
|
| 73-112 |
Peels surface off roofs;
windows broken; light trailer houses
pushed or
overturned; moving automobiles pushed
off roads |
| 113-157 |
Roofs torn off
houses; weak buildings and trailer houses destroyed; large trees
snapped and uprooted |
| 158+ |
Severe damage;
cars lifted off ground |
