Tri-State SKYWARN Storm Spotter
Page
Tri-State SKYWARN Storm Spotter
Page
| HAIL DIAMETER SIZE | DESCRIPTION |
|---|---|
| 1/4" | Pea Size |
| 3/4" (Severe Criteria) | Dime Size |
| 7/8" | Nickel Size |
| 1" | Quarter Size |
| 1 1/4" | Half Dollar Size |
| 1 1/2" | 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 ESTIMATE | DESCRIPTION |
|---|---|
| 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 |
| 39-54 mph | Twigs break off trees; wind generally impedes progress |
| 55-72 mph | Damage to chimneys and TV antennas; pushes over shallow rooted trees |
| 73-112 mph | Peels surfaces off roofs; windows broken; light mobile homes pushed or overturned; moving cars pushed off road |
| 113-157 mph | Roofs torn off houses; cars lifted off ground |
Author: Eric Grams, NØZJT
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cvj@yahoo.com
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