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Lightning Animations (492 videos)


--April is the middle month of meteorological spring in the Northern Hemisphere, and of autumn in the Southern Hemisphere. --By tracking the latest hours in white, the overhead sun can be seen moving east to west on a daily basis. --Thunderstorms travel west to east over the middle and higher latitudes in both hemispheres, and more slowly from east to west in portions of the tropics. Northern Hemisphere --Lightning is infrequent over Canada, Alaska, Central America, northern Europe, Russia, the Sahara south of the Mediterranean, Cuba, and Hispaniola. --Numerous squall lines and frontal boundaries occur over the central and southern United States with enormous lightning frequencies. --Several long-lasting thunderstorm systems are over Saudi Arabia and Yemen during April. --China has frequent active thunderstorm complexes traveling from west to east throughout the month. ~Ron Holle

May 4, 2016 Webmaster Archive

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S Hemisphere --The Andes provide a sharp western boundary in a NNW-SSE line and no lightning occurs over the cold water offshore of the Andes. --Daily thunderstorms over Brazil often have a generally counter-clockwise pattern but individual storms do not travel far. --The South Atlantic and South Pacific Oceans away from continents are nearly lightning-free. --Thunderstorm activity over the southeast half of Brazil weakens during the course of April. Tropics --The east-west equatorial trough is better defined over the eastern North Pacific Ocean than over the western Atlantic, western Pacific and Indian Oceans. --The northern edge of lightning activity has shifted to the north such that afternoon strikes in April are some distance inland from the coast of West Africa. --The major islands and land areas of Southeast Asia have thunderstorms on most afternoons due to sea breezes and along mountain slopes. --Afternoon thunderstorms near the equator over sub-Saharan Africa move from the ENE. ~Ron Holle

May 6, 2016 8:12:13 PM Dave Fincher

--01 to 02 April: An organized squall line races north to south across Bangladesh. --01 to 03 and 18 to 21 April: Well-organized storms form over South Africa and move far to the southeast. --01 to 06, 11 to 14, 21 to 23, and 25 to 27 April: Thunderstorms form on the west coast of Saudi Arabia and move east across the country. --02 to 05 April: Long lines of thunderstorms move along a frontal boundary from the Gulf of Mexico eastward to the Atlantic. --02 to 12 April: The equatorial trough has a double east-west structure over the Eastern Pacific. --11 to 15 April: A large cyclonic circulation persists over Israel to Iraq. --20 to 25 April: A large cyclonic circulation with frequent lightning is over the Atlantic east of Newfoundland. --25 to 29 April: Dry air moves south to north and suppresses all lightning across South America except the northern portion. --27 to 30 April: Prolific lightning production in two squall lines that move from west Texas to the southeast United States. ~Ron Holle

May 6, 2016 8:12:28 PM Dave Fincher