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Lightning Animations (492 videos)


--August is late summer in the Northern Hemisphere, and late winter in the Southern Hemisphere. --Note that by tracking the latest hours in white, the overhead sun can be seen to move E to W on a daily basis. --Thunderstorms travel W to E over the middle and higher latitudes in both hemispheres, and E to W in the tropics. --Much of the August lightning is over land and during the day. --The equatorial trough, also called the Intertropical Convergence Zone, is intermittently well defined in the North Atlantic and Eastern Pacific Oceans. --Daily storms develop over the south and west coasts of Yemen and move west to mainland Africa, sometimes growing quickly over Ethiopia. --Tropical waves (easterly waves) move E to W across Africa north of the equator. Some exit Africa across Senegal, enter the North Atlantic, and can become formation mechanisms for subsequent tropical cyclones. August has the most regular formation of tropical waves of the year. ~Ron Holle

Sep 3, 2014 Webmaster Archive

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--Over the southern Atlantic, Pacific, and Indian Oceans, organized clusters of lightning move from the W, and some can be tracked for several days. --Storms form on most days over Florida, Cuba, Hispaniola, and the eastern shores of Central American countries. --The Southwest Monsoon is evident in NW Mexico and SW U.S. to some extent every afternoon. --Well-organized areas of thunderstorms move eastward from the E coasts of large land masses in the middle latitudes of South Africa, Australia, and especially South America in August. ~Ron Holle

Sep 4, 2014 8:17:42 PM Dave Fincher

--02, 06, 11, 16, 21, and 26, and 30 August: Easterly waves (tropical waves) move westward across Africa. These areas have lightning over both ocean and land, and originate over Africa, then move across the Atlantic in the equatorial trough. These are among the best-defined tropical waves shown by GLD360 to date. --04, 08, and 20 August: The farthest north lightning events of the month are north of Siberia. Such thunderstorms occur at high latitudes in both hemispheres around and after the longest day of the year (late June in the Northern Hemisphere). --05 to 06 August: Strong lightning activity forms along the western shore of Norway on both afternoons, then race northeastward to the Arctic Ocean and Barents Sea. --05 August to end of month: Thunderstorms occur along the Mediterranean coast over the mountain ranges of Morocco and Algeria on many days. --24 to 30 August: This is a long period when Western Europe is nearly lightning-free. ~Ron Holle

Sep 4, 2014 8:17:59 PM Dave Fincher