Update 6:03 p.m. The National Weather Service has issued a special weather statement for inland and coastal Palm Beach County as strong thunderstorms with winds up to 55 mph marches toward the Atlantic.
Update 5:23 p.m. A significant weather advisory has been issued for inland Palm Beach County.
Update 4:45 p.m. A new weather statement has been issued as hail falls from the sky in southeast Palm Beach County and fears of 55 mph wind gusts accompany an approaching thunderstorm.
Meteorologists in Miami said at 4:45 p.m. they were tracking a strong thunderstorm over Plantation moving northeast at a speedy 25 mph.
Torrential rain is also expected with this storm. The statement is in effect until 5:15 p.m.
Update 4 p.m. The National Weather Service has issued a special weather statement for southeastern Palm Beach County as hail continues to pelt parts of Boca Raton and Delray Beach.
A line of strong thunderstorms is being tracked from near Weston to Boca Raton with the primary concern being frequent lightning and damaging hail.
About 10 million people in South Florida are under a marginal threat for severe weather.
Update 3:43 p.m. A flood advisory is in effect until 6:45 p.m. as heavy rain pounds areas of southeastern Palm Beach County.
Areas of most concern are those with poor drainage.
Some areas expected to experience flooding include Boca Raton, Delray Beach and Deerfield Beach.
Update 3:40 p.m. A special marine warning has been issued for coastal waters from Deerfield Beach to Jupiter Inlet after forecasters spotted a strong thunderstorm near Boca Raton heading northeast at 15 mph.
Update 3:05 p.m. A severe thunderstorm warning has been issued for southeastern Palm Beach County.
Forecasters issued the alert after seeing a storm near Kings Point moving east at 15 mph. Radar indicates there could be quarter-size hail with this storm and that damage to vehicles is expected.
A thunderstorm warning means severe weather is imminent and is occurring or about to occur. Forecasters suggest seeking shelter in a well-built structure as large hail and deadly lightning is part of this storm.
There have been reports of pea-sized hail in Miami-Dade County.
Update 2:41 p.m. Meteorologists are warning of frequent to excessive lightning in Palm Beach County with a strong thunderstorm nine miles west of Palm Beach Gardens.
The storm could include small hail and gusty winds.
This advisory is in effect until 3:15 p.m.
There is also a special weather statement for southern Palm Beach County for winds gusting to 55 mph and torrential downpours. This advisory is in effect until 3:30 p.m.
Forecasters are concerned about storms near Boynton Beach moving east at 15 mph.
The National Weather Service has issued a special weather statement for coastal areas of Palm Beach County as a strong thunderstorm approaches the area.
The storms are more sea breeze related than part of the larger system that is moving east from the Gulf of Mexico.
Winds in excess of 40 mph may be part of this storm, as well as dime-size hail.
Locations impacted include West Palm Beach, Wellington, Lake Worth, Riviera Beach, Greenacres, Royal Palm Beach, North Palm Beach and Palm Beach.
Forecasters said this storm could intensify.
The Storm Prediction Center in Norman, Okla., said there is a 20 percent chance a thunderstorm watch will be issued.
While low level winds remain weak, meteorologists said upper level wind shear – winds changing direction and speed with height – may support supercell thunderstorms.