A cold front slicing through stifling heat and humidity will give way to vicious thunderstorms this afternoon and evening.
Targeted cities include Boston, Providence, Hartford, New York, Philadelphia, Baltimore, Washington D.C., Pittsburgh and Cleveland.
On Tuesday, powerful thunderstorms erupted from this same front. Across northern New York, Vermont and New Hampshire, there were dozens of reports of downed trees and large hail.
This afternoon, the thunderstorms will explode farther south across the megalopolis.
Read about the impacts these storms have had so far along the Northeast and eastern coast.
The main threats from these beastly storms will be damaging blasts of wind, hail larger than the size of quarters, dangerous, vivid lightning and blinding downpours.
If you have outdoor plans this afternoon and evening, pay close attention to the weather. Keep an eye to the sky and heed any watches or warnings that may be issued.
If a watch is issued, this means the potential for a dangerous thunderstorm is high, but the threat is not imminent. If a warning is issued, this means a dangerous thunderstorm is imminent, and you should take shelter immediately.
For the latest storm information, please check back often at AccuWeather.com.
Tropical Storm Matthew has formed in the Caribbean could take a turn toward the United States as a hurricane next week.
It will feel like an extended winter for those living from the northern Plains to the eastern U.S., as cold and snowy conditions last longer than normal.
The final day of September will bring a rare lunar event that hasn’t occurred since March of 2014, a Black Moon.
Rain will spread over much of the northeastern U.S. into the weekend, but persistent downpours will raise the flood risk in part of the mid-Atlantic.
A new typhoon is brewing in the western Pacific Ocean and could pose a risk to Japan, Taiwan and eastern China next week.
Thundery showers set to start this weekend will depart before the season's first National Football League game in London kicks off on Sunday.
Terre Bone Parish, LA (1915)
Hurricane hit with 140-mph winds. The storm wrecked 90 percent of the buildings in town. Central pressure of 951.9 mb; 275 killed, $13 million damage.
St. Louis, MO (1927)
Tornado 300 feet across with a 4-mile path crossed river. Twister killed 72, caused $22 million damage. Total of 81 dead from outbreak and $25 million damage.
Colorado Springs (1959)
A storm produced 28 inches of snow.