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Lightning Animations (492 videos)


--September is the first month of meteorological autumn in the Northern Hemisphere. --Nearly all lightning activity in the northern half of the map is moving from W to E, and from E to W in the southern half of the map. --Most lightning is during the day except over the continental U.S. where storms often linger into the nighttime hours along and ahead of frontal boundaries. --Storms form on most days over Florida, Cuba, Hispaniola, and the eastern coast of Mexico. --Several organized surges of lightning due to tropical cyclones move from south to north in the North American Monsoon area of northwest Mexico and southwest U.S. --The Caribbean Sea is usually a lightning minimum due to 1) strong easterly winds, and 2) subsidence from land areas on all sides. ~Ron Holle

Oct 1, 2014 Webmaster Archive

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--04 September: A semicircle of lightning is in the southern Gulf of California from Hurricane Norbert. --05-07 September: A long line of thunderstorms extends from Oklahoma to Ontario, dissipates, then reforms the next day. --13 September: U.S. is nearly lightning-free. --20-21 September: Small derecho begins in Alberta and races to the Great Lakes. --24-25 September: Thunderstorm line moves N to S across West Texas ahead of a cold front. --26-30 September: Deep monsoon moisture causes thunderstorm activity extending N and NE across all of the southwest U.S. ~Ron Holle

Oct 3, 2014 10:51:47 PM Dave Fincher