Hail Diameter Size and Wind Descriptors

Wind Speed Estimation	Description
less than 1 mph	Calm; smoke rises vertically
1 - 3 mph	Direction of wind shown by smoke drift, but not by wind vanes
4 - 7 mph	Wind felt on face; leaves rustle; ordinary vane moved by wind
8 - 12 mph	Leaves and small twigs in constant motion; wind extends light flag
13 - 18 mph	Raises dust and loose paper; small branches are moved
19 - 24 mph	Small trees in leaf begin to sway; crested wavelets form on inland waters
25 - 31 mph	Large branches in motion; whistling heard in telephone wires
32 - 38 mph	Whole trees in motion; inconvenience felt walking against the wind
39 - 46 mph	Breaks twigs off trees; wind generally impedes progress
47 - 54 mph	Slight structural damage occurs
Severe begins at 58 mph
55 - 63 mph	Damage to chimneys and TV antennas; pushes over shallow rooted trees
64 - 74 mph	Rarely experienced; structural damage becomes possible
above 75 mph	Very rarely experienced; see Fujita scale descriptions