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Lightning Animations (492 videos)

World_6hr_Oct_2014

--October is the middle month of meteorological autumn in the Northern Hemisphere, and of meteorological spring 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. --Thunderstorms travel W to E over the middle and higher latitudes in both hemispheres, and E to W in the tropics. --The equatorial trough, also called the Intertropical Convergence Zone, is active in the North Atlantic and Eastern Pacific Oceans for several periods through the month. --Easterly (tropical) waves move E to W across Africa north of the Equator, and exit Senegal countries to the south every few days. Some waves survive a short distance into the Atlantic, and a few make it part way across the Atlantic. None result in tropical cyclones in October. --The Andes provide a sharp western boundary in a generally NNW-SSE line, and no lightning occurs over the cold water offshore of the Andes. ~Ron Holle

Nov 5, 2014 Webmaster Archive

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(Continued) --Thunderstorms initiate over Ethiopia on many days and move W or SW across the continent. --Almost no lightning occurs over the Sahara, except along the Mediterranean coast. --Well-organized areas of thunderstorms move eastward from the E coasts of large land masses in the middle latitudes of South Africa, Australia, and especially South America in September. --Storms sometimes form during the day against the south slope of the Himalayas. --The Caribbean Sea is usually a lightning minimum due to 1) strong easterly winds, and 2) subsidence from land areas on all sides. ~Ron Holle

Nov 10, 2014 6:10:48 PM Dave Fincher

--01 to 02 October: Large squall line moves ENE from Tasmania. --02 to 04 October: A long boundary across the SE half of the U.S. represents thunderstorms along a cold front bringing cool, dry air E of the Rocky Mountains. --04 to 06 October: Thunderstorms move N to S from southern China. --05 to 06, 08-10, and 17-20 October: Well-organized areas of thunderstorms move E from Argentina and Uruguay. --09 to 11 October: Tropical cyclone Vongfong is evident in a semicircular pattern to the NW of Micronesia. --11 to 20 October: Lightning activity is especially frequent over Hispaniola and SE Cuba. ~Ron Holle

Nov 10, 2014 6:11:00 PM Dave Fincher

(Continued) --12 to 13 October: Tropical cyclone Hudhud crosses E to W from the Bay of Bengal onto India. --14 to 18 October: Large storm complexes move E from South Africa. --16 to 18 October: Strong circular lightning patterns from Hispaniola north to Bermuda are due to Hurricane Gonzalo. --18 to 21 October: A well-organized stationary mid-latitude cyclone is evident west of Morocco. --23 to 25 October: A closed circulation is evident off the eastern shore of the U.S. and Canada. --24 to 26 October: Organized mostly stationary low over Greece and surrounding regions. --26 to 27 October: Storms move rapidly across western and southern Australia. ~Ron Holle

Nov 10, 2014 6:11:13 PM Dave Fincher