Heaviest rain anticipated across Pennsylvania and southern New York state to the upper mid-Atlantic coast and southern New England.
AccuWeather Global Weather Center – August 12, 2019 – The dry, sunny and fall-like weather experienced in the northeastern United States over the weekend will be replaced by soaking rain, severe thunderstorms and more humid air by Tuesday.
Residents will soon be trading in sunglasses for umbrellas.
"The large area of high pressure keeping much of the Northeast dry and comfortable this weekend will slowly weaken and move out to sea during the early part of this week," AccuWeather Meteorologist Mary Gilbert said.
On Monday, people from northern New York state to Maine will need the rain gear as pockets of showers and thunderstorms sweep through these areas.
Elsewhere in the Northeast, a slight uptick in humidity and temperatures will signal a change in the weather.
A storm system with more moisture will impact a broader area of the Northeast by Tuesday, according to Gilbert.
This system will first set off a round of downpours and severe thunderstorms across part of the Midwest on Monday.
The storm will then sweep across the Northeast with heavy rain to the north of its track and severe weather to its south.
Latest indications point toward the heaviest rain spreading across Pennsylvania and southern New York state to the upper mid-Atlantic coast and southern New England.
Within this zone, soaking and beneficial rain will fall. However, in the metro areas, street and highway flooding with substantial travel disruptions can be anticipated.
Parts of the I-95 corridor dealt with flooding downpours around the middle of last week. The risk of new flooding with this latest round of downpours will be even higher should the forward speed of the storm system slow down.