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LIGHTNING
STORM_MOTION_SUB

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Safety and Preparedness

Lightning

What to do before (Preparedness):

  • Protect your home/office electronics with surge protectors or other lightning damage protection.
  • Know the county in which you live and the names of nearby major cities.
  • Have a NOAA Weather Radio available and check the batteries.
  • Realize the possibility that outdoor activities may need to be postponed due to the threat of lightning.

What to do during (Safety):

  • If thunder roars, move indoors!
  • Unplug electronic equipment.
  • If caught outdoors, stay away from lightning prone areas such as hills, water, golf courses, and lone tall trees or power poles.

Threat levels and suggested actions:

green light=no threat
Occasionally check forecasts for updates on thunderstorm potential.
yellow light=limited threat
Be prepared to take action if thunderstorms do develop. Remain aware of changing weather conditions and occasionally check forecasts for updates on the thunderstorm activity.
red light=elevated threat
Be alert to changing weather conditions and be prepared to take action if thunderstorms develop. Frequently check forecasts for updates on the thunderstorm activity.
purple light=significant threat
Factor Thunderstorms into your outdoor plans. Be prepared to move indoors or into shelter when thunderstorms approach.
black light=critical threat
Consider postponing outdoor plans due to thunderstorms.
Lightning Safety Links

 

Legend and Definitions


The lightning threat level is based on the probability of thunderstorms in an area.

The probability of thunderstorms in an area is forecast based on :

  • Probability of precipitation
  • Availability of instability
green light=no threatNil Probability of Lightning < 15%
Atmospheric conditions are not conducive for thunderstorm development within the forecast area.
yellow light=limited threatLimted Probability of Lightning 15-30%
Atmospheric conditions are somewhat favorable for thunderstorm development within the forecast area.
red light=elevated threatElevated Probability of Lightning 31-60%
Atmospheric conditions are favorable for thunderstorm development within the forecast area.
purple light=significant threatSignificant Probability of Lightning > 60% <90%
Atmospheric conditions are very favorable for thunderstorm development and thunderstorms are likely within the forecast area.
black light=critical threatCritical Probability of Lightning > 90%
Thunderstorms will occur within the forecast area.
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