Update: Significant weather advisory for Palm Beach County expires

Update 7:42 p.m.: The significant weather advisory for southeastern Palm Beach County was allowed to expire.

But thunderstorms with lightning are still moving through Palm Beach County with showers possible into the overnight hours.

Today’s thunderstorms developed along a frontal boundary north of Lake Okeechobee interacting with moist warm air in South Florida.

Update 6:35 p.m.: A significant weather advisory has been issued for southeastern Palm Beach County, including Delray Beach and Boca Raton.

Forecasters are tracking a line of strong thunderstorms with rotation that could produce funnel clouds.

Damaging winds of up to 55 mph and small hail are possible with these storms. The advisory is in effect until 7:45 p.m.


Update 6:30 p.m.: The National Weather Service has allowed the tornado warning to expire for East and Central Palm Beach County.

Update 6:05 p.m.: A strong line of thunderstorms extending from 7 miles west of North County Airport to 8 miles southwest of Lion Country Safari has triggered a severe thunderstorm warning for northeastern Palm Beach County.

Locations impacted include West Palm Beach, Wellington, Jupiter, Palm Beach Gardens and Riviera Beach.

The thunderstorm warning is in conjunction with the tornado warning for areas including Loxahatchee Groves, Royal Palm Beach and The Acreage. The tornado warning is in effect until 6:30 p.m.

UPDATE 5:55 p.m.: A tornado warning has been issued for northern-central Palm Beach County until 6:30 p.m. The areas that might see tornadoes include Loxahatchee Groves, Royal Palm Beach and The Acreage.

The National Weather Service is warning of possible quarter-size hail, and are calling this a “dangerous storm” that will be near Lion Country Safari around 6:30 p.m.

The line of thunderstorms with the potential tornado is moving east at 35 mph.

Forecasters are warning people to take cover in areas where storms are heavy.

Update 4:30 p.m.: The National Weather Service has issued a special marine warning for Lake Okeechobee as strong thunderstorms extend over a northwestern portion of the lake moving southeast.

Wind gusts of 39 mph or higher are possible. Frequent lightning, and heavy downpours are also expected.

Previous story: Showers and some strong thunderstorms are possible in South Florida today as daytime heat combines with a frontal boundary limping through the state.

The National Weather Service in Miami said “robust” showers are forecast, especially after the sea breezes kick up this afternoon.

Gusty winds and heavy rain is also possible as the slow-moving boundary may linger over some areas. Rain chances jump from 41 percent at 1 p.m. to 70 percent at 2 p.m.

Check The Palm Beach Post radar map.

Up to 1.19 inches of rain could fall in parts of western Palm Beach County and south of Lake Okeechobee, while the Weather Prediction Center has coastal areas with up to 0.75 inches.

The Storm Prediction Center in Norman, Okla., is forecasting thunderstorms for Florida, but did not have any part of the state in a threat level area as of 7 a.m.

But slight cooling aloft triggered by a mid-level trough could mean a more unstable atmosphere, NWS forecasters said.

Related: How hail is formed 

Warm surface air shooting into a frigid upper atmosphere is one recipe for thunderstorms. A muggy overnight where temperatures dropped only into the mid-70s in West Palm Beach means daytime temperatures could heat up quickly.

Download the Palm Beach Post WeatherPlus app here.

“Daytime heating in combination with the frontal boundary and upper trough in this rich atmosphere should bring robust coverage of showers and storms as we head into the afternoon, especially as both sea breezes get going,” NWS forecasters in Miami wrote in their morning discussion.


Author: Kimberly Miller

Kimberly grew up outside Washington D.C. She graduated from the University of Arizona in 1995. Her beats have included K-12 education, universities and colleges, real estate, and general assignment.

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