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Lightning Animations (492 videos)


--December is the first month of meteorological winter in the Northern Hemisphere, and of spring in the Southern Hemisphere. --By tracking the latest hours in white, the overhead sun can be seen moving E to W on a daily basis. --Thunderstorms travel W to E over the middle and higher latitudes in both hemispheres, and more slowly from E to W in many locations in the tropics. ~Ron Holle

Jan 5, 2016 Webmaster Archive

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Northern Hemisphere --The northern edge of lightning activity over Africa has shifted south after 05 December to south of 5 degrees north latitude, which places thunderstorms over the Atlantic south of the West African countries. --Australia has active thunderstorms every December day in the form of sea breezes, cold fronts, and squall lines. --Lightning is almost entirely absent in Canada, northern Europe, Russian, China, and the Sahara south of the Mediterranean. --Cuba, Hispaniola, and Central America are often free of lightning. ~Ron Holle

Jan 7, 2016 7:45:45 PM Dave Fincher

Southern Hemisphere --The Andes usually provide a sharp western boundary in a NNW-SSE line and no lightning occurs over the cold water offshore of the Andes. --New thunderstorms often form over southern Brazil, move NE, then NW in a generally counter-clockwise pattern. --Storms at higher latitudes over Argentina generally move from a westerly direction. ~Ron Holle

Jan 7, 2016 7:45:59 PM Dave Fincher

Tropics --The major islands and land areas of Southeast Asia have thunderstorms on most afternoons due to sea breezes and along mountain slopes. --The equatorial trough, also called the Intertropical Convergence Zone, is in an east-west alignment and often well-defined over the Atlantic and western Pacific, but more diffuse over the Indian Ocean and Arabian Sea. ~Ron Holle

Jan 7, 2016 7:46:13 PM Dave Fincher

Specific --01 to 10 December: A persistent trough is located over the western Caribbean, oriented southwest to northeast. --01 to 11 December: Three clusters of lightning with banded structure approach the Oregon and Washington coasts, moving from west to east. --03 to 09 December: A line of thunderstorms travels west to east across all of southern Australia. --08 and 25 December: The farthest south lightning of the month occurs over and south of Ushuaia, Argentina. --14 to 16 December: A squall line moves south to north across southeast Australia. --15 to 20 December: One of several large areas of thunderstorms during December is over the Atlantic east of the U.K. --16 and 27 December: The equatorial trough east of Brazil has a split structure. --22 to 28 December: Several significant severe weather outbreaks are accompanied by frequent lightning over the southeast one-third of the U.S. --30 to 31 December: The equatorial trough east of New Guinea is very strong. ~Ron Holle

Jan 7, 2016 7:46:25 PM Dave Fincher