| Hail Diameter Size | Description |
|---|---|
|
1/4" |
Pea Size |
|
1/2" |
Marble Size |
|
3/4" |
Penny Size |
|
7/8" |
Nickel Size |
|
1"(Severe Criteria) |
Quarter Size |
|
1 1/4" |
Half Dollar Size |
|
1 1/2" |
Walnut/Ping Pong Ball Size |
|
1 3/4" |
Golf Ball Size |
|
2" |
Hen Egg Size |
|
2 1/2" |
Tennis Ball Size |
|
2 3/4" |
Baseball Size |
|
3" |
Teacup Size |
|
4" |
Grapefruit Size |
|
4 1/2" |
Softball Size |
| Wind Speed Estimation | Description |
|---|---|
|
less than 1 mph |
Calm; smoke rises vertically |
|
1 - 3 mph |
Direction of wind shown by smoke drift, |
|
4 - 7 mph |
Wind felt on face; leaves rustle; |
|
8 - 12 mph |
Leaves and small twigs in constant motion; |
|
13 - 18 mph |
Raises dust and loose paper; |
|
19 - 24 mph |
Small trees in leaf begin to sway; |
|
25 - 31 mph |
Large branches in motion; |
|
32 - 38 mph |
Whole trees in motion; |
|
39 - 46 mph |
Breaks twigs off trees; |
|
47 - 54 mph |
Slight structural damage |
|
Severe begins at 58 mph |
|
|
55 - 63 mph |
Damage to chimneys and TV antennas; |
|
64 - 74 mph |
Rarely experienced; |
|
above 75 mph |
Very rarely experienced |
Wind speed estimation taken from the Beaufort Scale.
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