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Lightning Animations (492 videos)

World_6HR_May_2015

--May is the last 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 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 the tropics. --The equatorial trough, also called the Intertropical Convergence Zone, is intermittently defined near the equator over the Atlantic and eastern Pacific Ocean all through the month. --No lightning occurs over the Sahara during the month, except along the immediate Mediterranean coast. --Numerous large organized thunderstorm lines and complexes form in the western U.S. and move generally eastward across the continent every few days. --The major islands of SE Asia have thunderstorms most afternoons due to sea breezes and along the slopes of mountain ranges. ~Ron Holle

Jun 1, 2015 Webmaster Archive

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--The Andes provide a sharp western boundary in a generally NNW-SSE line; no lightning occurs over the cold water offshore of the Andes. --Over sub-Saharan Africa, afternoon thunderstorms form daily in a rather narrow swath within 10 degrees of the equator. They tend to move W. --Lightning is on the S side of the Himalayas over India to some extent every day. --Australia is almost lightning-free during May. --A persistent cyclonic trough over the western U.S. results in afternoon thunderstorms through the month. --Extensive lightning reaches along the west coast of Canada north to Alaska later in the month. ~Ron Holle

Jun 3, 2015 8:22:35 PM Dave Fincher

--03 to 05 May: A strong line of thunderstorms forms over central Argentina and moves far to the N, bringing drier air to nearly eliminate lightning in southern Brazil before dissipating. --07 to 10 May: Several curving lines of lightning are apparent from Tropical Storm Ana as it moves from offshore Florida to the Carolinas. --08 to 12 May: Two lines of thunderstorms, likely along frontal boundaries, move NW to SE across China. --17 to 19 and 22 to 25 May: The eastern Amazon is remarkably free of lightning. --18 to 30 May: Daily storms grow over Morocco and sometimes Algeria. --24 to 26 May: Several thunderstorm complexes move N to S from Bangladesh. ~Ron Holle

Jun 3, 2015 8:22:49 PM Dave Fincher