…AIR FORCE HURRICANE HUNTERS FIND BERTHA HAS STRENGTHENED… …TROPICAL STORM WATCHES AND WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE NORTHERN GULF COAST… As of 10:00 AM CDT Tue Jul 21 the center of Bertha was located near 29.3, -86.3 with movement NNW at 3 mph. The minimum central pressure was 995 mb with maximum sustained winds of about 60 mph.
