After several quiet years, tornadoes have erupted in the United States over the last two weeks as a volatile mix of warm, moist air from the Southeast and persistent cold from the Rockies clashed and stalled over the Midwest.
On Monday, the U.S. tied its current record of 11 consecutive days with at least eight tornadoes confirmed on each of those days, said Patrick Marsh, warning coordination meteorologist for the federal Storm Prediction Center. The previous 11-day stretch of at least eight tornadoes per day ended on June 7, 1980.
