Potentially severe thunderstorms are expected to fire up across the New York City metro area later Tuesday, as we kick off July, climatologically our warmest month of the year. It will be dry through the morning,

Forecasters warned of flash flooding across Maryland, Pennsylvania and New Jersey. Parts of the Mid-Atlantic States — including Pennsylvania, Maryland, Delaware, Virginia and New Jersey — were on alert on Tuesday evening, as a forecast for thunderstorms and heavy rain led to flash flood warnings across the region.

A cold front is poised to trigger potentially dangerous thunderstorms across central Pennsylvania today, a day after heavy rain and storms caused flooding and downed trees across the region. A flash flood watch will be in effect from 2 to 11 p.m. Tuesday for several counties, including Cumberland, Franklin, Lancaster, Lebanon and Perry counties