CA-SA_24HR_April2014
--April is autumn in the Southern Hemisphere, and spring in the Northern Hemisphere. --Most lightning over land is during the day. --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 interior regions, including the Amazon basin, thunderstorms move from the E or ENE. --The equatorial trough, also called the Intertropical Convergence Zone, is intermittently well defined in the Atlantic and eastern Pacific. --Over the Northern Hemisphere, large organized squall lines and other thunderstorm complexes generally move from WSW to ENE at higher speeds than over the Amazon. ~Ron Holle
May 2, 2014 Webmaster Archive
--01 to 02 April: The first of many well-organized storms move from Nigeria to the WSW over the Atlantic Ocean. --08 to 09 April: A thunderstorm complex moves NE from Argentina with a circulation evident as it moves into SE Brazil. --12 to 14 April: A major clearing of lightning occurs from S to N as dry air likely arrived behind a cold front. --28 to 29 April: A cyclonic circulation is present over the open portions of the S Atlantic Ocean. ~Ron Holle
May 5, 2014 9:08:52 PM Dave Fincher