Earlier this afternoon thunderstorms developed over Glades County and we're tracking eastward across Central Lake Okeechobee. When the cluster of thunderstorms reached the extreme western portions of Martin County lake waters, the storms began interacting with the east coast Seabreeze boundary that was moving slowing southwestward.
I anticipated this about an hour earlier and made my way out to Port Mayaca, which is located in Western Martin County on the eastern shore of Lake Okeechobee. I watched as the storms continued eastward and intensified with a significant increase in lightning and storm structure. The National Weather Service in Melbourne, FL issued a severe thunderstorm warning for Western Martin County and I'm glad they did, as you can see in the photograph above an impressive rain-foot was developing and indicates a good chance severe straight-line winds are at the surface.