A daylong swarm of tornadoes that left a trail of destruction across the Southeast killed three people and injured a dozen more. It wasn’t clear Tuesday exactly how many twisters skipped across the region after the onslaught began early Monday. But the National Weather Service tweeted more than 240 tornado warnings for the region over a roughly 21-hour period. And the Storm Prediction Center logged at least three dozen reports of storm damage from east Texas to Alabama and as far north as Tennessee. One person was killed in Louisiana, and two died in Alabama.