SoAmer_Oct15_6HR
--October is the middle month of meteorological spring in the Southern Hemisphere. --Most lightning over land is during the day. --The Andes usually provide a sharp western boundary in a generally NNW-SSE line and no lightning occurs over the cold water offshore of the Andes. --The equatorial trough, also called the Intertropical Convergence Zone, is somewhat well defined in an east-west alignment over the Atlantic Ocean westward from Africa. --Storms form farther south over South America as the month progresses. --Areas of frequent daily formation of thunderstorm complexes are 1) east-central Brazil, and 2) NE Argentina to Paraguay and Uruguay. ~Ron Holle
Nov 3, 2015 Webmaster Archive
--01 to 04 and 15 to 17 October: Large thunderstorm areas form in central Argentina and move NE to southeastern Brazil. Smaller complexes occur in similar locations on other days later in the month. --10 to 13 October: A cluster of strokes is stationary over the Atlantic east of Brazil. --22 to 27 October: A new thunderstorm complex forms over southern Brazil, moves NE, then NE and NW in a circular pattern. --25 to 27 October: Dispersed lines of lightning move eastward over the South Atlantic east of Argentina. ~Ron Holle
Nov 5, 2015 7:35:50 PM Dave Fincher