Line of storms travels more than 700 miles across the U.S.


Source: NOAA Storm Prediction Center

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(NOAA)– Intense thunderstorms developed across Minnesota Sunday evening, July 12.

Lift along the leading edge of the expanding thunderstorm outflow (rain-cooled air) contributed to the development of more storms and a relatively fast-moving squall line that moved across Lake Michigan and northern Illinois during the early morning hours Monday, July 13.

The leading edge of the line of storms has maintained a near-steady speed of 40 miles per hour, and the storms are now making their way across the Appalachians into the Carolinas, where a severe thunderstorm watch is in effect.

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