A severe thunderstorm watch is issued when a severe thunderstorm (defined as “damaging winds 58 miles per hour or more, or hail three-fourths of an inch in diameter or greater”) is likely to develop. A severe thunderstorm warning is issued when a severe thunderstorm has been reported or identified on radar. Once a warning has been issued, it is important to take shelter and listen to a battery-operated radio for more information. Also, remember that thunderstorms can hit with no warning.
When a thunderstorm warning is issued –
• Ensure that flashlights and fresh batteries are available.
• Ensure that battery powered radios with weather band (and fresh batteries) are available.
• Ensure that auxiliary sources of electricity are in working order (e.g., generators).
During a thunderstorm –
• Stay indoors.
• Do not handle any electrical equipment, telephones, or televisions during the storm because lightning could follow the wire.
• Avoid water faucets and sinks because metal pipes can transmit electricity.
Additional Information
Is a lightening rod installed on ATC building?
Thunderstorms/Lightning
Thunderstorms area fairly common occurrence, but they can cause severe damage. They can involve heavy rain (which can in turn cause flash flooding), high winds, lightning, and hail. They can also cause tornadoes. Lightning is a serious danger whenever there is a thunderstorm. Lightning is very powerful; it can start fires, cause electrical failures, and seriously injure or even kill people. Hail (which can be as large as a softball) can also cause damage and injury, making it even more important to take cover.
Preventive actions to reduce the risk of thunderstorm/lightning damage –
• Be sure staff members know and take seriously the signs that a thunderstorm is imminent (threatening clouds, distant thunder and lightning).
• Keep a disaster kit stocked in case staff members are unable to leave the building for some time (flashlights, radio with weather band, batteries, food and water, first aid kit, etc.). Check all items every six months and replace any expired items (e.g., water, food, batteries).
• Ensure that staff members know how to turn off the electricity and water in case this becomes necessary.
• Check for hazards near your building, such as dead or rotting trees and branches that could fall during a severe thunderstorm.
• Consider installing lightning rods to carry the electrical charge of lightning bolts safely to the ground.