Increasing severe weather and excessive rainfall threats over theCentral U.S. through early next week......Sweltering heat continues across South Florida and southern Texas,building into the southern High Plains this weekend...Stormy conditions should wind down across the central Gulf coast whilepersisting along a quasi-stationary boundary over Florida through Sunday.Attention shifts toward the Central U.S. on Sunday and into early nextweek as a deep mid-level low digs into the West. A surfac...