Which counties in the USA receive the most storm warnings issued by the National Weather Service?
A tally of all flash flood, severe thunderstorm and tornado warnings between 2001 and 2005 show that Pima County, Ariz., (which includes Tucson) had the most warnings with a total of 404. San Bernardino County, Calif., (east of Los Angeles) was second with 320, followed by Harris County, Texas, (which includes Houston) with 281. This USA TODAY resource page has more about severe storms. (Answered by meteorologist Brent MacAloney of the National Weather Service in Silver Spring, Md.