(CNN) — Multiple tornadoes ... tornado emergency, the most extreme tornado warning, issued by the National Weather Service. Grinnell endured a “large and extremely dangerous tornado” Sunday ...

BISMARCK, N.D. (AP) — Two tornadoes that killed six people in North Dakota and New York each had wind speeds topping 100 mph ...

Damaging storms tore through parts of 10 ... most serious tornado warning issued by the National Weather Service – in Illinois, Alabama and Kansas since Friday. At least two EF4-strength ...