Massive multiday severe-weather outbreak begins in heartland

A nearly 800,000-square-mile swath of the U.S. is bracing for tornadoes, hail, damaging winds and flash floods over the next several days.
2:06 | 05/18/19

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Transcript for Massive multiday severe-weather outbreak begins in heartland
17 states are bracing for dangerous weather tonight as we start the weekend. Powerful storms across the midwest, lightning there near South Bend, Indiana. From Texas to Michigan, now straight through Sunday. Meteorologist rob Marciano reporting in from Dallas tonight. Reporter: Tonight, from Colorado to Michigan bracing for hail, tornado and winds. In Kansas, officials releasing more than 2 brl gallons of water from eldorado lake. It's already overflowing and they are bratsing for more rin. Overnight, a taste of what's to come. Lightning over skies in Iowa. A flying section of roofs sparking power lines. Outside of a store in Indianapolis. Hamilton county, Indiana, 70 mile an hour wind gusts blowing transformers and trees. Golf ball sized hail trapping this couple in their car in east Illinois. The main system hammered the west feet of snow to squaw valley and major flooding in Spokane. Intense weather. Let's get to rob with the latest. Hey, roob. It has the strength and size of a wingder storm and it's running in spring warmth and wind here. And the lay out. The breadth of the system, right now, the dynamics over Nebraska for tornadoes. We had one tornadoes touch down in west Texas. Overnight, the cells will congeal and getting to Dallas and moving east in areas that flooded late in the day, and Omaha, Iowa, later on. Sunday, Chicago, Cincinnati, Memphis and Monday, reset the pattern, especially here in Texas. David? A difficult weekend ahead. Rob Marciano, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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