Storm Encyclopedia

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According to Weather.com:

Tornado watch — Conditions are conducive to the development of tornadoes in and close to the watch area.

Tornado warning — A tornado has been sighted by spotters or indicated on radar and is occurring or imminent in the warning area.

Severe thunderstorm watch — Conditions are conducive to the development of severe thunderstorms in and close to the watch area.

Severe thunderstorm warning — A severe thunderstorm has been observed by spotters or indicated on radar, and is occurring or imminent in the warning area.

Severe thunderstorms can produce tornadoes or cause damage from their strong wind gusts and/or hail.

Click on this link to find out more about what to do in case of a big storm/tornado

Emergency Information

Visit http://www.fairfaxcounty.gov/emergency/ for tips from that will help you keep safe and able to respond to changing events. In the event of an emergency, their emergency blog will be updated with breaking news and information.

Photo: Jimmy Baikovicius