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Lightning Animations (492 videos)


--July is the middle of summer in the Northern Hemisphere, and mid-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. --Over the middle and higher latitudes in both hemispheres, systems are traveling W to E. --The major islands of SE Asia have thunderstorms on some afternoons, but activity is not as frequent as at other times of the year, and they tend to move slowly from the W during July rather than from the E in many other months. --The equatorial trough, also called the Intertropical Convergence Zone, is intermittently well defined in the Atlantic and east Pacific Oceans. --Although the most frequent direction of thunderstorm movement is from west to east, there are periods of easterlies over many parts of Europe at various times through the month. This large-scale E to W motion of lightning almost never occurs over the U.S. during summer. ~Ron Holle

Aug 1, 2014 Webmaster Archive

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(cont) --Organized lines and clusters of lightning move from the W over the southern Atlantic, Pacific, and Indian Oceans during this winter month, and some last 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 during every July afternoon. --Well-organized areas of thunderstorms move eastward from the E coasts of large land masses in the middle latitudes of South America, South Africa, and Australia. --Daily storms develop over the south and west coasts of Yemen on most days. ~Ron Holle

Aug 11, 2014 7:52:52 PM Dave Fincher

--01 to 03 July: The formation of tropical storm Arthur is evident off the east coast of Florida. --02 to 04 July: A well-organized low is circulating over Spain and producing frequent lightning, then it moves NE. --07-08 and 16-19 July: Closed circulations are due to typhoons off the SE coast of China. --09 to 12 July: Frequent German lightning moves rapidly E to W. --10-11, 17, and 20 July: The farthest north lightning occurs in thunderstorms N of Russia. High-latitude cases also are apparent N of Canada on the 25th, N of Iceland on the 16th, and NE of Finland on the 28th. Such thunderstorms occur at high latitudes in both the Northern and Southern Hemispheres around and after the longest day of the year (late June in the Northern Hemisphere). --13-15, 19, 25-26, and 29-30 July: Thunderstorms form along the coastal mountains of Morocco and Algeria. ~Ron Holle

Aug 11, 2014 7:53:05 PM Dave Fincher

(Cont) --18 to 19 July: Lightning activity moves E to W over central Russia. --23 to 24 July: An E-W line of thunderstorms over western Russia moves south and amplifies during the afternoons, most likely along a cold front sagging southward. --29 to 31 July: A frontal boundary sags N to S across the eastern part of the U.S. southward into the northern part of Florida and the Gulf of Mexico. ~Ron Holle

Aug 11, 2014 7:53:17 PM Dave Fincher