Update, 1 a.m.: The National Weather Service has canceled the tornado warning for east central Palm Beach County.
Update, 12:50 a.m.: The National Weather Service has issued a tornado warning for east central Palm Beach County until 1 a.m.
The most dangerous part of the storm will be near Boynton Beach beginning around 12:45 a.m.
Update: 10:55 p.m. Around 10:30 p.m., the National Weather Service reported strong thunderstorms moving into Western Glades County with winds gusting between 45 and 55 mph
Update 9:20 p.m. The Storm Prediction Center has increased the threat area across South Florida for severe weather, including in Palm Beach County.
The marginal threat for thunderstorms means locally damaging winds and tornadoes are possible.
The worst of the weather is expected to hit the southeast coast after 2 a.m.
Previous story: Thunderstorms are possible late this afternoon into the overnight hours ahead of what may be the coldest, driest air of the season and the first extended period of below normal temperatures since late January.
The Storm Prediction Center has extended the marginal threat area to include much of Collier, Glades, Indian River, Brevard and Hendry counties, with a mention of storms along the southeast coast including in Palm Beach County.
But National Weather Service forecasters in Miami said there is a chance the threat will be moved even further east this afternoon, and Melbourne meteorologists aren’t ruling out tornadoes in some Central Florida counties.
A surface low pressure system located this morning over the western Gulf of Mexico and its trailing front is responsible for whatever rain and storms occur during the next 24 hours with Palm Beach County forecast to get up to 0.25 inches of rain by 8 a.m. Tuesday.
The National Weather Service in Miami said the best chance for thunderstorms will come after 6 p.m. this evening as a squall line moves west to east across the Peninsula. Storms will be emboldened by a screaming jet stream running at 150 mph and higher moisture levels on the west coast of the state.
This map shows the forecast location of the front as of 2 p.m. this afternoon.
By 8 a.m. Tuesday, the front is expected to be through the area and the National Weather Service is forecasting only a 20 percent chance of rain for South Florida on Tuesday.
But the real news is a day behind the front when what forecasters said could be the coolest air of the season washes through the Peninsula.
“This air mass looks to be one of the driest and coolest, potentially, that South Florida has seen this winter,” NWS forecasters in Miami wrote in a discussion. “Temperatures in the 40s and 50s can be expected over a large portion of South Florida from mid-week to week’s end.”
Because the drier air will make temperatures feel “crisp”, forecasters said they will be keeping a close eye on winds later this week to see if a wind chill threat emerges.
The normal daytime high this time of year for West Palm Beach is 79 degrees, with a normal overnight low of 62 degrees. That means temperatures will be running about 10 degrees cooler than normal.
While South Florida is bracing for cold temperatures, the Northeast is expecting blizzard conditions and a paralyzing storm that has already led to thousands of flight cancellations today and tomorrow.
Accuweather meteorologists said the snowfall could rival the blizzard of March 1993.
“The heaviest snow is likely to fall near the I-81 corridor of Pennsylvania and along part of the New York Thruway in the Hudson Valley of New York, I-91 in northern Connecticut and Massachusetts and I-93 in New Hampshire,” Accuweather wrote in a press release.
Twelve states are under a winter storm warning from the National Weather Service. Areas from West Virginia to Maine can expect debilitating conditions and snowfall of one to three inches per hour in some places.
In New York, blizzard conditions with up to 2 feet of snow are forecast for the western portions of the state. Possible blizzard conditions early Tuesday morning are forecast for southeastern areas.
In Boston, snow will start falling early Tuesday morning with winds increasing throughout the day to gusts of up to 40 mph. Chance of precipitation is 100 percent with new snow accumulations of up to 17 inches possible.
“Residents should prepare for school closures and potential cancellations of sporting events due to hazardous travel for players and fans,” according to Accuweather Senior Meteorologist Kristina Pydynowski in a morning forecast. “New York City’s Central Park has not recorded more than 10 inches of snow from one storm in March since the 1993 Storm of the Century.”
Forecasters in the Mount Holly, N.J. office of the National Weather Service are asking people to stay in their homes between 2 a.m. and 2 p.m. Tuesday. If travel is unavoidable, people are being asked to take a “safety packet” of warm clothing, bottled water and a fully charged cell phone.
“No unnecessary travel,” they wrote.