Update 2:20 p.m.: Robust thunderstorms are threatening coastal Palm Beach County with forecasters warning of gusty winds, hail and lightning.
One storm was nearly stationary near Wellington, but the National Weather Service has an advisory for inland, metro and coastal Palm Beach County in effect until 3 p.m.
An urban and small stream flood advisory is in effect until 4:30 p.m. for northeastern Palm Beach County, while a thunderstorm wind gust of 52 mph was recorded at 2:19 p.m. at Okeeheelee Park.
Locations impacted include West Palm Beach, Boynton Beach, Wellington, Palm Beach Gardens, Lake Worth, Riviera Beach, Juno Beach, Ocean Ridge, Greenacres, Lantana, Lake Park and Atlantis.
Previous story: The National Weather Service has issued a significant weather advisory for areas of south and central Palm Beach County as strong thunderstorms move into the region.
Forecasters are warning of frequent to excessive lightning, torrential downpours and gusty winds up to 55 mph.
The storms are moving northeast at about 10 mph.
Areas affected include Wellington, Royal Palm Beach and Loxahatchee. The advisory is in effect until 2:45 p.m.
Previous story: The National Weather Service is warning of the potential for strong to severe storms this afternoon affecting inland and coastal areas of South Florida.
The storms could produce wind gusts up to 60 mph, frequently lightning, nickel-size hail and flooding.
As of 1 p.m., storms developing in Miami-Dade and Broward counties have prompted significant weather advisories for coastal and inland areas with alerts to winds gusting up to 55 mph.
Flood advisories have also been issued for southeastern Miami-Dade and Broward counties as a strong line of thunderstorms trail over the area.
According to the National Weather Service, the storms are moving northeast at about 10 mph.
Concern about the storms include two competing wind components – a southwest steering flow and the east coast sea breeze that develops in the afternoon with diurnal heating.
“The light steering flow will also lead to some minor street flooding over the metro areas of South Florida this afternoon due to the slow movement and possible training of showers and thunderstorms,” forecasters wrote this morning.
At the same time, temperatures high in the atmosphere are just 17 degrees, which can increase the robustness of thunderstorms “with a few storms possibly becoming severe over the eastern areas of South Florida this afternoon.”
Thunderstorms can be triggered when there is a large difference in temperature between the warm air rising off the land and the frigid air high in the atmosphere.