More than 100 million people in the U.S. will be in the path of an intense March storm starting Friday as the sprawling multi-day system threatens fires, blizzards, tornadoes, and flooding as it tracks eastward across the Great Plains.
Scientists said the storm's strength and potential for far-reaching impacts is notable, but its timing isn't particularly unusual. Extreme weather can pop up in spring because storms feed on big temperature differences between the warmth that’s starting to show up and the lingering chill of winter.
