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.
Sun and warm temperatures will be disrupted by weekend rain and possible thunderstorms.
Cold air sweeping in this weekend will help pave the way for a snowstorm Sunday afternoon into Monday morning around Harrisburg, Pennsylvania.
Cold air sweeping in this weekend will help pave the way for a winter storm Sunday into Monday morning around Pittsburgh.
A snowstorm reaching Detroit on Sunday will bring colder air and 3 to 6 inches of snow, and more snow is expected next week.
Cold air sweeping in this weekend will help pave the way for a snowstorm by Monday around Boston.
Cold air sweeping in this weekend will help pave the way for a snowstorm Sunday night into Monday around New York City.
Philadelphia, PA (1977)
The coldest January on record in 211 years of record-keeping.
Northway, AK (1989)
Record high barometer reading of 1978.4 mb (31.85 inches) -- North American record.
Minneapolis, MN (1990)
Never below zero this January for the first time on record for January.