National Weather Service United States Department of Commerce

Upcoming Spotter Training Sessions Info:

(Dates are Below2021 Severe Storm Spotter Show Slideshow Download)

 

Current Severe Weather Information

 

Reference Information

 

Send in a Report

  

Reference Information 

  Hail Size Chart: (diameter in inches)

  • Pea Size: 0.25 inches
  • Small Marble: 0.50 inches
  • Penny: 0.75 inches 
  • Nickel: 0.88 inches
    Any hail size below is severe thunderstorm criteria:
  • 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; 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.

 

 

 Spotter Training Classes

 

Frequently Asked Questions about Spotter Training Sessions

  1. Do I need to preregister for these sessions? Most of the time, no. All you need to do is arrive at the proper time and location. However, in rare instances, a county might request registration with their officials. Check the details of the session to see if preregistration is required.
     

  2. About how long do the sessions last? Approximately 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. 
     

  4. Is there a fee to attend? There is no fee to attend.

    Click on any talk below for additional information. Not all sessions may appear in the list. Try clicking on the "Look for More" link to see if more are scheduled.

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