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Lightning Animations (492 videos)


--July is the middle month of meteorological summer in the Northern Hemisphere. --Extensive squall lines, frontal boundaries, and monsoon activity with enormous lightning frequencies occur over most of the United States all month. --Northwest Mexico has diurnal thunderstorms whose moisture reaches into the western United States during several periods. --Central America has very frequent lightning throughout the month. --Canadian lightning tends to form daily over the western provinces, while larger traveling systems dominate the east. --Lightning over Alaska is confined to the southeast. --The east-west aligned equatorial trough, also called the Intertropical Convergence Zone, is ill defined over the western North Atlantic and eastern North Pacific at the start of the month, and gradually strengthens toward the end of July. ~Ron Holle

Aug 2, 2016 Webmaster Archive

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--01 to 06 July: A north-south tropical wave with lightning moves from the eastern Caribbean islands to Mexico; another wave travels the same route a week later. --06 to 08 July: Afternoon storms form in the lee of the Rocky Mountains in Colorado and Wyoming, and move eastward during the night; also at other times. --09 to 12 July: Most of Alaska’s July lightning occurs in the southeast. --10 to 31 July: The Gulf of Mexico is very active. --19 to 23 July: Mexican monsoon thunderstorms extend northward into the southwest United States; also at other times. --20 to 23 July: Organized squall line moves from the Dakotas across the Great Lakes. --24 to 25 July: Frequent thunderstorms over Hawaii. ~Ron Holle

Aug 10, 2016 12:50:23 AM Dave Fincher