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Graphical HWO - Thunderstorm Threat
More information about the Thunderstorm Threat graphic.

Thunderstorm Threat
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Categories
No Storms Thunderstorms are NOT EXPECTED during the period.
General Strong or severe thunderstorms are not anticipated. The main hazard with any storms would be cloud to ground lightning and brief gusty winds (30 mph or less).
Strong Some strong thunderstorms are possible, with the main threats being frequent cloud-to-ground lightning, wind gusts to 50 mph, and hail to 1/2" in diameter.
Strong to Severe The majority of storm activity is expected to remain below severe criteria. However, a few severe storms are possible, with the main threats being wind gusts to 60 mph and hail up to 1" in diameter.
Severe There is an increasing probability of severe thunderstorms. The primary threats would be winds greater than 60 mph and hail up to 2" in diameter. Isolated, weak tornadoes are possible.
Widespread Severe The occurrence of significant severe weather is likely. The main threats would be wind gusts in excess of 80 mph, very large hail (greater than 2" in diameter), along with an increasing threat for tornadoes. An isolated strong or violent tornado (F2 intensity or greater) is also possible.

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Huntsville, AL Weather Forecast Office
320 Sparkman Drive
Huntsville, AL 35805
Phone: (256) 890-8503
Page Author: WFO Huntsville, AL Web Team
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Date Modified: May 4, 2008