Update 5:16 p.m. The flood advisory for Palm Beach County has been cancelled.
National Weather Service forecasters said the heaviest rains have ended and flooding is no longer a threat.
Update 3:50 p.m.: The National Weather Service has issued a flood advisory for coastal Palm Beach County.
Urban and small stream flooding is possible in metro areas as strong thunderstorms sweep through the area.
Areas that could experience flooding include West Palm Beach, Boca Raton, Deerfield Beach, Boynton Beach and Delray Beach.
The advisory is in effect until 5:45 p.m.
Blame the east coast sea breeze for the storms, which are expected to linger, causing the concern over flooding.
The high temperature in West Palm Beach today reached 92 degrees, which also helped initiate the showers.
Forecasters said the worst of the weather should gradually shift inland as the east-southeast flow continues through the afternoon.
Previous story: A significant weather advisory for coastal and inland thunderstorms was issued by the National Weather Service, advising of frequent lightning and gusty winds up to 55 mph.
Forecasters in Miami said a strong line of nearly stationary storms from Jupiter to Boynton Beach was detected on radar.
Locations affected include West Palm Beach, Boca Raton, Deerfield Beach, Boynton Beach, Delray Beach, Wellington, Jupiter, Palm Beach Gardens, Lake Worth and Riviera Beach.
Torrential rains and the possibility of funnel clouds are possible with these storms, forecasters warn.