Still another view of Wednesday's bank of towering 50,000+ ft. tall lake breeze-induced thunderheads (cumulonimbus clouds) hovering over Cook County as photographed between 1 and 2:30 p.m. from the Illinois Mathematics and Science Academy in Aurora--some 40 miles west of Chicago--by Matt Piechota who works there. Spectacular shots, Matt! Thanks for sharing them with us.
Tom Skilling

Photos courtesy of Matt Piechota
Tom Skilling

Photos courtesy of Matt Piechota
