Storms could ruin outdoor activities across the Southeast, upper Great Lakes, Missouri Valley and the Four Corners while dry conditions will prevail across the rest of the nation on Labor Day.
After a dry and pleasant weekend across the Northeast, heat and humidity will return on Labor Day.
An area of high pressure centered over the Northeast this weekend will move across the western Atlantic as winds shift from the northeast this weekend to the southwest on Labor Day.
"High temperatures will rebound into the upper 80s and the lower 90s F early next week," according to AccuWeather meteorologists Colette Mancini and Alex Sosnowski.
"Humidity levels will increase and haze will build," they added.
While much of the Northeast has experienced many days this summer with very warm temperatures, temperatures of this magnitude tend to be less common in September.
According to AccuWeather Senior Meteorologist Dave Dombek, "With normal temperatures trending downward quickly this time of the year, the heat may be more extreme when compared to earlier this summer."
Some record high temperatures could be challenged across parts of the Northeast early next week including New York City, Philadelphia and Boston.
Those attending afternoon Labor Day baseball games at Yankee Stadium, Nationals Park and Fenway Park should remember to stay hydrated and wear sunscreen to protect yourself from dangerous UV rays.
An unsettled weather pattern will persist across the Southeast and Gulf Coast into Labor Day.
Spotty showers and thunderstorms will develop, mainly during the afternoon from Florida and Georgia, westward to the southern Appalachians and the Gulf Coast.
Those with outdoor plans on Labor Day should keep an eye to the sky in case a thunderstorm rolls into your area.
Any thunderstorm that develops could contain torrential downpours and frequent lightning.
A dynamic storm system that will spread strong thunderstorms across the Upper Midwest through the weekend will track eastward on Labor Day and bring the threat for thunderstorms from Michigan to the Missouri Valley.
Storms on Labor Day are not expected to be as strong as those over the weekend. Any thunderstorm that does develop could contain gusty winds and heavy rain.
Weather delays are possible for anyone heading to an afternoon baseball game in Chicago, St. Louis and Kansas City. Storms should hold off for the game in Detroit.
Behind the storm system, a cooler and pleasant Labor Day will unfold across the Upper Midwest.
Temperatures across the northern Plains will fall to more seasonable values as the region gets a break from the consistent heat during the first few days of September.
Widespread high temperatures in the 80s and 90s so far this September will be replaced with 60s and 70s by Labor Day.
Temperatures have been as much as 15 degrees above normal for September across the northern Plains.
A prolonged period of dry and hot conditions will continue across the southern Plains through Labor Day.
According to AccuWeather meteorologist Josh Searles, "An upper-level ridge of high pressure positioned over the southern and central Plains states will keep the heat and humidity locked in for this year's Labor Day holiday."
"With high temperatures in the 90s to near 100 in Oklahoma and Texas, staying hydrated will be important," AccuWeather Meteorologist Michael Doll said.
Most people with outdoor plans in the region should not have to worry about rain. However, a couple of thunderstorms could develop across southeastern Texas, mainly during the afternoon.
Normal temperatures across the southern Plains on Labor Day range from the upper 80s to lower 90s.
Across the West, a dry and seasonable weather pattern will unfold for many, while spotty afternoon thunderstorms will fire across the Four Corners.
Conditions will be favorable for any outdoor activities on Labor Day, such as a barbecue or heading to a baseball game.
Those across the Four Corners should keep an eye to the sky in case a thunderstorm develops.
"People camping or hiking should be prepared to seek shelter from lightning should a storm pop up nearby," Doll said.
Your minute-by-minute Labor Day forecast can be found on AccuWeather.com Minutecast®. Type your city name, select Minutecast® and input your street address. Mobile users can also use their GPS location.