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About Spotters


Real-time reports are critical in issuing warnings and saving lives.  That’s an indisputable fact!  Spotters provide real-time ground-truth of local conditions, such as hail size, wind speed, tornado development, and local damage, to help warn the public. Even as new technology allows the National Weather Service to issue warnings with greater lead time, spotters will always serve as a critical link between radar indications of severe weather and what’s happening on the ground.

Who are spotters?

Virtually every community has some form of spotter network. Often, local fire and police personnel are trained to observe and report severe weather, partly due to their extensive radio communication and 24-hour operations.  Citizens may also be an active part of the spotter network, some with an avid interest in the weather and many without.  Some spotters are amateur radio operators.  All share a sense of responsibility to their neighbors.  

What is Skywarn?

SKYWARN is a program sponsored by the National Weather Service. The program is made up of thousands of volunteers who attend regular training and then scan the skies of their communities identifying and reporting critical storm information.  These volunteers, sometimes organized under the SKYWARN banner in the U.S., are typically trained by NWS forecasters to be the eyes and ears of both the warning forecasters and the local public safety networks.

Skywarn logo

Training Schedule


NWS Chicago is pleased to host in-person Storm Spotter training sessions from winter to spring 2024!

The in-person training will cover severe weather hazards including thunderstorms and tornadoes, safety concerns, planning for and anticipating severe thunderstorms, general storm structure and movement, and identification of important storm features.

  • All sessions last about 2 hours.
  • They are free and open to the public.
  • Classes are appropriate for all ages. Ages 10 and up will likely get the most out of the training.
  • Pre-registration is required for some but not all in-person sessions. Registration information, if needed, is included when clicking on a date and location in the calendar below. 
  • You may attend a class offered by any NWS office, regardless of where you live.
  • A few additional training sessions may be added over the coming weeks. 
  • National Weather Service Storm Spotter StoryMap

Note: Please click on calendar entry below to view more information about the training session including registration information, if needed.

Online Spotter Training Course


The online course is a great introduction to storm spotting and can also be used as a refresher or a way to reinforce what you have learned in an in-person class.  

Online Spotter Training Course


What to Report



Important points to remember during severe weather:

  • The NWS Chicago Forecast Office service area covers 23 counties in Illinois and Indiana.  Because of this large coverage area, it is important to maintain efficient and effective communication.
  • Take the time to be sure of your observation.
  • Take the time to formulate your report before calling.  
  • If you are mobile, make sure you know where you are at all times.
  • Remain CALM.  Speak slowly and clearly. 
  • Please do not relay second-hand reports from TV, scanners, etc.

Printable Spotter Reference Sheet

Reporting Criteria: Please report only the following:

Weather-related damage

  • Size/number of trees or limbs down
  • Damage to cars, trains, tractors, other vehicles
  • Damage to buildings, signs, traffic signals, etc
  • Significant crop damage
  • Power lines or poles down

Flash Flooding

  • 6-inches of water (curb-deep) or more flowing across roads
  • 2-feet of water standing on roads
  • Roads closed or washed out
  • Creeks or streams out-of-banks
  • Floating cars
  • Buildings with basements or first floors flooding 
  • Mud or rock slides or debris flow
  • Ice jam, levee failure or dam break

Funnel Cloud
Wall Cloud


  • rotation visible - Yes, No, Not sure.

Heavy Rain (1" or more)
Wind gusts (50 mph or greater)
Hail (size?)


  • measured or estimated?



Become a Spotter in the NWS Chicago Area

So you are interested in becoming a storm spotter for the National Weather Service in the Chicago area. That's great!  Now you are wondering how to get started.  Well, you've come to the right place!  Here are the steps: 



1. Read some brief background about storm spotting.

About the Skywarn spotter program 

2. Attend a storm spotter training class. 

Classes are free, last about 2 hours, and are open to the public.  In the WFO Chicago area, spotter training classes are conducted from early February through early April.  Scheduling of spotter training classes begins around the New Year. Spotter training classes cover the basics of severe weather, including storm structure, feature identification, spotter positioning, safety, and severe weather communication.

3. Find out about the local storm spotting network in your community.

If possible, attend a class in your local area so you will gain the most information about the Skywarn activities in your own community.  If you are not able to attend a class in your community, contact your county emergency manager to learn more about local storm spotting efforts.

4. Retrain.

The NWS Chicago requires that spotters retrain every 2 years to remain active.


Frequently Asked Questions

Q. What is a storm spotter?

A. The National Weather Service's (NWS) primary mission is to save lives and protect property through the issuance of warnings for hazardous weather. The WSR-88D Doppler Weather Radar is a great tool for detecting and tracking potentially severe storms and essentially all strong and violent tornadoes. However, NWS meteorologists also depend on real-time reports from trained spotters to know exactly what is occurring on the ground under a storm. The NWS trains people to identify severe storms and tornadoes and report them via organized communications networks (primarily local and county emergency management, law enforcement and amateur radio).

Q. What is the difference between a storm spotter and a storm chaser?

A. A storm spotter is volunteer or paid county or municipal employee who is spotting as a community service. Most spotters work as part of an organized network and are in communication with their community or organization, which is in turn in communication with the NWS. Some spotters are "mobile" spotters in vehicles, but most spot from fixed, strategic locations around the community or county. The purpose of spotting is to alert community officials and the NWS and assist them in warning the public. Schools, hospitals, and other facilities are encouraged to have spotters to alert people in their care of impending severe weather.

Storm chasing involves following a developing thunderstorm to view or photograph severe weather phenomena. Chasing may be done for educational purposes or scientific research but is mostly done for personal fulfillment.

Q. I want to be a storm chaser. What should I do?

A. College of DuPage in Glen Ellen offers storm chasing field trips that are open to students and the public. The Valparaiso University Meteorology Department offers storm chasing as an educational tool to 3rd and 4th year meteorology students. There are private firms, mostly in the Great Plains, that offer storm chase tours/vacations. Many can be found through an internet search.

Q. How do I become a spotter?

A. Attend a basic tornado and severe weather spotter class. Classes are held throughout the area, they are free and open to the public. The class takes about 1 ½ to 2 hours. Most classes are held weekday evenings, but there are a few daytime and Saturday classes. The training is generally done in late winter and early spring - before severe weather season. The training consists of a slide and video program which teaches potential spotters about severe storm structure, and how to identify cloud features and other environmental clues to identify severe storms and tornadoes. Communications systems and spotter networks are explained so the spotter knows where to report, and how that information is used by the NWS and local officials.  A complete schedule of classes can be found on our website from about late January through April. 

Q. Is there a minimum age requirement to become a spotter?

A. Because of the complexity of severe thunderstorm structure and development, and the potential danger involved, spotting is recommended for adults. People of all ages attend spotter training classes.  Those ages 10 and up are likely to get the most from the class. Youth who are interested in attending a spotter training class are welcome to attend with a parent or other adult.  

Q. I have already taken a spotter class. Where can I learn more?

A. The National Weather Service encourages spotters to be retrained every 2 years. In addition, spotters can attend the Advanced Severe Weather Spotter Workshop at Lisle . The Advanced Spotter class is usually held on a Saturday in early March. It is an all-day class. There is a registration fee that covers the cost of the speakers, lunch and refreshments. More information will be given when the date is set.

Q. Does the NWS issue a certificate or spotter ID number?

A. The NWS does not issue spotter ID numbers. Certificates are available on request. Some county emergency management agencies issue IDs and/or certificates. Please check with your local officials.

Q. Does the NWS have any training material?

A. In the past, the NWS has been able to hand out copies of the Basic Spotters' Field Guide. However, due to limited printing this year, the NWS has made the Field Guide available online. You can find it at: There is also a version of the Weather Spotter's Field Guide in Spanish too.