( CNN ) -- 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 . 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 were n'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 .
Storm system continues eastward toward the Great Lakes , Mississippi River . The threat of tornadoes is expected to diminish . Severe weather watches are posted from Louisiana to Mississippi .