Spotter Information Page

Pea Size: 0.25 inches
Small Marble: 0.50 inches
Penny: 0.75 inches <--Any hail this size or larger is severe thunderstorm criteria
Nickel: 0.88 inches
Quarter: 1.00 inches
Half Dollar: 1.25 inches
Ping Pong Ball: 1.50
Golf Ball: 1.75 inches
Hen Egg: 2.00 inches
Tennis Ball: 2.50 inches
Baseball: 2.75 inches
Grapefruit: 4.00 inches
Softball: 4.50 inches

Wind Speed Estimate:

25-31 mph: Large branches in motion; whistling heard in telephone wires.
32-38 mph: Whole trees in motion; inconveniencefelt 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.

Spotter Training Classes

Below is a listing of upcoming severe weather spotter training sessions.

Frequently asked questions about spotter sessions:

1. Do I need to preregister for these sessions? No. All you need to do is arrive at the proper time and location.

2. About how long do the sessions last? Approxmiately 2 hours.

3. Do I have to live / be a spotter in the county that I take the training session? No. The training sessions are identical.

There are currently no outreach events scheduled.