Severe thunderstorm and heavy rain threat increases this weekend in the Midwest and East

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Severe thunderstorms with damaging winds, hail, and perhaps a few tornadoes may become numerous in parts of the East this weekend.

As we move through the weekend, two jet streams will be influencing the weather across the U.S.

Severe Setup

Saturday, the northern jet stream will take a southward dip across the Upper Midwest and Great Lakes.

These situations allow for warm and cool air to clash at the surface. The disturbance aloft will create lifting of warm, moist air and that will produce showers and thunderstorms.

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East coast weather and storms, tornado Virginia
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Severe thunderstorm and heavy rain threat increases this weekend in the Midwest and East
WAVERLY, VA - FEBRUARY 25 The remains of a home lie in the path of destruction from a tornado that barreled through the small community of Waverly,the day before on February 25, 2016 in Waverly, Virginia. Virginia's Governor McAuliffe declared a state of emergency after a storm system spawned tornados that killed four people on February 24, and the Virginia National Guard expects to have more than 50 soldiers on duty to help emergency response. (Photo by Jay Paul/Getty Images)
WAVERLY, VA - FEBRUARY 25: Paul Logan, 21, talks about the tornado that barreled through the small community of Waverly, VA the day before on February 25, 2016 in Waverly, Virginia. Logan said it sounded like a bomb exploded in the front of his home during the storm. Virginia's Governor McAuliffe declared a state of emergency after a storm system spawned tornados that killed four people on February 24, and the Virginia National Guard expects to have more than 50 soldiers on duty to help emergency response. (Photo by Jay Paul/Getty Images)
WAVERLY, VA - FEBRUARY 25 The remains of a home lie in the path of destruction from a tornado that barreled through the small community of Waverly,the day before on February 25, 2016 in Waverly, Virginia. Virginia's Governor McAuliffe declared a state of emergency after a storm system spawned tornados that killed four people on February 24, and the Virginia National Guard expects to have more than 50 soldiers on duty to help emergency response. (Photo by Jay Paul/Getty Images)
WAVERLY, VA - FEBRUARY 25: A tree lays on a house a day after a tornado barreled through the small community of Waverly, on February 25, 2016 in Waverly, Virginia. Virginia's Governor McAuliffe declared a state of emergency after a storm system spawned tornados that killed four people on February 24, and the Virginia National Guard expects to have more than 50 soldiers on duty to help emergency response. (Photo by Jay Paul/Getty Images)
WAVERLY, VA - FEBRUARY 25 Sussex, County deputy, Larry Anthony, right, and Investigator, Eddie Oburn look over the remains of a home where two men and a child were killed when a tornado barreled through the small community of Waverlym the day before on February 25, 2016 in Waverly, Virginia. Virginia's Governor McAuliffe declared a state of emergency after a storm system spawned tornados that killed four people on February 24, and the Virginia National Guard expects to have more than 50 soldiers on duty to help emergency response. (Photo by Jay Paul/Getty Images)
WAVERLY, VA - FEBRUARY 25: Sussex, County deputy, Larry Anthony, (C) and Investigator, Eddie Oburn, (L), look over the remains of a home where two men and a child were killed when a tornado barreled through the small community of Waverly on February 25, 2016 in Waverly, Virginia. Virginia's Governor McAuliffe declared a state of emergency after a storm system spawned tornados that killed four people on February 24, and the Virginia National Guard expects to have more than 50 soldiers on duty to help emergency response. (Photo by Jay Paul/Getty Images)
WAVERLY, VA - FEBRUARY 25: The remains of the house that held 3 victims, two men and a child, when a tornado tore through the structure are seen February 25, 2016 in Waverly, Virginia. Virginia's Governor McAuliffe declared a state of emergency after a storm system spawned tornados that killed four people on February 24, and the Virginia National Guard expects to have more than 50 soldiers on duty to help emergency response. (Photo by Jay Paul/Getty Images)
WAVERLY, VIRGINIA Ã FEBRUARY 25, 2016: Sussex, County deputy, Larry Anthony, left, and Investigator, Eddie Oburn look over the remains of a home where two men and a child were killed when a tornado barreled through the small community of Waverly the day before February 25, 2016 in Waverly, Virginia. Virginia's Governor McAuliffe declared a state of emergency after a storm system spawned tornados that killed four people on February 24, and the Virginia National Guard expects to have more than 50 soldiers on duty to help emergency response. (Photo by Jay Paul/Getty Images)
WAVERLY, VA - FEBRUARY 25: The remains of the house that held 3 victims, two men and a child, when a tornado tore through the structure are seen February 25, 2016 in Waverly, Virginia. Virginia's Governor McAuliffe declared a state of emergency after a storm system spawned tornados that killed four people on February 24, and the Virginia National Guard expects to have more than 50 soldiers on duty to help emergency response. (Photo by Jay Paul/Getty Images)
WAVERLY, VIRGINIA Ã FEBRUARY 25, 2016: Sussex, County Investigator, Eddie Oburn walks past a truck that was crushed by a tree during a storm the day before February 25, 2016 in Waverly, Virginia. Virginia's Governor McAuliffe declared a state of emergency after a storm system spawned tornados that killed four people on February 24, and the Virginia National Guard expects to have more than 50 soldiers on duty to help emergency response. (Photo by Jay Paul/Getty Images)
Timothy Williams looks over a car in front of his destroyed mobile home as he walks through debris left by a deadly storm that swept through Waverly, Va., Wednesday, Feb. 24, 2016. Williams was in the car that he is standing next to when a storm swept through the area. (AP Photo/Steve Helber)
Laundromat manager Brad Poindexter, of Danville, Va., jumps over bricks at his damaged business after a deadly storm that swept through Waverly, Va., Wednesday, Feb. 24, 2016. (AP Photo/Steve Helber)
Laundromat manager Brad Poindexter, of Danville, Va., walks over bricks at his damaged business after a deadly storm that swept through Waverly, Va., Wednesday, Feb. 24, 2016. (AP Photo/Steve Helber)
Spectators walk through debris left by a deadly storm that swept through Waverly, Va., Wednesday, Feb. 24, 2016. (AP Photo/Steve Helber)
Spectators look over debris left in the downtown area left by a deadly storm that swept through Waverly, Va., Wednesday, Feb. 24, 2016. (AP Photo/Steve Helber)
Rahim Logan, left, and Antoinette Bendrick clear debris from driveway in front of their damaged home after a deadly storm that swept through Waverly, Va., Wednesday, Feb. 24, 2016. (AP Photo/Steve Helber)
Stairs and a destroyed foundation is all that is left from a mobile home that was carried across a highway by a deadly storm that swept through Waverly, Va., Wednesday, Feb. 24, 2016. (AP Photo/Steve Helber)
An overturned car rest on a highway next to the foundation of a mobile home that was throw across the highway by a deadly storm that swept through Waverly, Va., Wednesday, Feb. 24, 2016. (AP Photo/Steve Helber)
Timothy Williams talks on a phone in front of his destroyed mobile home as he walks though debris left by a deadly storm that swept through Waverly, Va., Wednesday, Feb. 24, 2016. Williams said he was in the car that he is standing next to when a storm swept through the area. (AP Photo/Steve Helber)
Timothy Williams talks on a phone in front of his destroyed mobile home as he walks though debris left by a deadly storm that swept through Waverly, Va., Wednesday, Feb. 24, 2016. Williams said he was in the car that he is standing next to when a storm swept through the area. (AP Photo/Steve Helber)
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This disturbance will progress eastward from the Upper Midwest to the Great Lakes region on Saturday and it will approach the Eastern Seaboard Sunday.

The result will be the progression of thunderstorms eastward. Some thunderstorms will turn severe and they will produce large hail and damaging winds.

The overall tornado threat is relatively low but isolated tornadoes are possible.

Meanwhile, a disturbance in the subtropical jet stream that has been producing heavy rain across much of Texas this week, will move northeastward and weaken.

Moisture from this system will be pulled northward and it will interact with the northern system. This will enhance rainfall totals in the eastern U.S. so some locations will see heavy rain, along with the threat for severe thunderstorms.

(MORE: View National Interactive Radar Map | Difference Between a Watch and a Warning)

Below is our latest forecast thinking on the timing and magnitude of the severe threats.

Saturday
Forecast: Scattered strong to severe thunderstorms from the Upper Midwest and Ohio Valley to the Appalachians and Mid-Atlantic states.
Threats: Damaging wind gusts primarily. Some hail and perhaps a tornado or two are also possible.
Cities: Louisville | Columbus | Pittsburgh | Washington D.C.

Sunday
Forecast: Severe storms and locally heavy rain, from parts of New York state to eastern Georgia, most numerous in the mid-Atlantic states.
Threats: Damaging wind gusts, leading to downed trees, tree limbs and power outages. Some hail and a few tornadoes are also possible.
Cities: Philadelphia | Washington D.C. | Richmond | Raleigh | Charlotte

Parts of the eastern U.S. will see heavy rain this weekend. The heaviest rain (2 to 4 inches) with locally heavier amounts are more likely across the Appalachians (localized flooding is possible). A general area of 1 to 3 inches of rain could fall from the Carolinas up to New England.

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