Amtrak service in the Northeast has also been canceled due to the storm, according to WABC.

Video out of New York City showed ominous clouds rolling in just after 5 p.m. ET.

Ominous clouds roll across the New York City sky as the Northeast braces for severe thunderstorms. https://t.co/p9MmORNbEd

Live radar: https://t.co/olfdo5YRgY pic.twitter.com/bGkS1Nyz8P

— ABC News (@ABC) May 15, 2018

Conditions were so bad in Newburgh that the city decided to close all roads due to the damage to trees and electrical infrastructure. Brookfield, Connecticut, declared a \"town disaster\" in response to the weather, urging people to remain indoors until officials can assess the damage.

A tornado watch was issued this afternoon for upstate New York, the Hudson Valley, northeast Pennsylvania, western Connecticut, Massachusetts and southern Vermont. Winds up to 80 mph and large hail are also threats in those areas.

Look at the size of this hail! Wow! It shattered windows, dented cars in this Columbia County neighborhood. pic.twitter.com/Lvf97CyRVC

— Andrew Banas (@AndrewWTEN) May 15, 2018

Title: You Better Stay Indoors Materials: Ice, wind, water Dimensions: REAL BIG Author: Naturaleza Location: The Tiny Gallery and beyond

A post shared by The Tiny Gallery (@the.tiny.gallery) on May 15, 2018 at 12:10pm PDT

\"PHOTO:
ABC News
PHOTO: Severe storm radar.
>

The severe threat will likely pass by about 9 p.m.

\"PHOTO:
Emily Arnold via Reuters
PHOTO: Storm clouds gather over Reston, Va., May 14, 2018, in this still image obtained from social media video.
>
\"PHOTO:
Pablo Martinez Monsivais/AP
PHOTO: A bicyclist rides is heavy rainfall in downtown Washington, May 14, 2018.
>

Here are a couple of basic safety tips to follow with regard to thunderstorms. pic.twitter.com/NmXS5UwQ0J

— NWS New York NY (@NWSNewYorkNY) May 15, 2018

The Southeast is also expected to see heavy rain over the next several days. Flash flooding is possible throughout the week.

\"PHOTO:
ABC News
PHOTO: Heavy rain forecast.
>

ABC News' Briana Montalvo contributed to this report.

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