Severe weather moves to the eastern third of the U.S.

Story highlights

  • Storm system moving eastward toward the Great Lakes, Tennessee Valley
  • The threat of tornadoes is expected to diminish
  • Severe weather watches are posted from Texas to Mississippi

The powerful storm system behind the twister that ravaged Moore, Oklahoma, set its sights on the Great Lakes and Tennessee Valley on Wednesday, forecasters said.

"Primary threats will be damaging winds and large hail," according to the National Weather Service. "Isolated tornadoes will also be possible."

Severe weather watches continued into the early hours of the day for portions of Texas, Oklahoma, Louisiana, Arkansas and Mississippi.

What to know about tornadoes

CNN Explains: Tornadoes

    Just Watched

    CNN Explains: Tornadoes

CNN Explains: Tornadoes 02:45
PLAY VIDEO
See tornado devour roof in Oklahoma

    Just Watched

    See tornado devour roof in Oklahoma

See tornado devour roof in Oklahoma 02:17
PLAY VIDEO
See tornado break up over Oklahoma

    Just Watched

    See tornado break up over Oklahoma

See tornado break up over Oklahoma 00:51
PLAY VIDEO

The threat of a few strong tornadoes, large hail and thunderstorm wind gusts remained in northeastern Texas, southwestern Arkansas, extreme southeastern Oklahoma and northwestern Louisiana, CNN Meteorologist Sean Morris said. A strong line of storms was also present across much of Mississippi.

EF5 tornadoes are terrifying

"The threat for strong tornadoes will rapidly diminish in these areas ... with the main threat becoming damaging straight line winds during the overnight hours," Morris said. "Isolated tornadoes will still be possible."

Rainstorms pushed through the Dallas area on Tuesday afternoon. A ground stop at Dallas-Fort Worth International Airport was later lifted.

Why Moore has been hit more than once

Storms weren't restricted to the Great Plains and Midwest.

The National Weather Service said weather spotters on Tuesday afternoon reported a possible tornado near Copake, New York, near the Massachusetts border.

Track the severe weather

Mobile tools to help you survive tornado season

10 deadliest U.S. tornadoes on record