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See it: Fireball caught streaking across night sky in multiple Midwest states on Tuesday
More than 100 people witnessed a fireball shooting through the sky late Tuesday night in at least five different states in the Central U.S.
Next round of snow begins across winter-weary East, late-week storm could cause travel trouble
A stronger clipper is expected to move across the Great Lakes and Northeast late Thursday, with parts of the Interstate 95 corridor likely seeing snow beginning sometime Friday afternoon into early Saturday.
Cause and effect: Here's how different temperatures produce specific types of 'effect snow'
In some unique scenarios, it comes down to a cause and effect that differs from traditional snowstorms: when cold air interacts with warm water, the temperature difference can produce snow. Here's how lakes, oceans, rivers and steam produce snow in a stand-of hot and cold temperatures.
Arctic plunge: Polar vortex locks in snow, ice and life-threatening cold after historic cross-country storm
In the wake of the historic winter storm that blasted 40 states this weekend, a dome of Arctic air associated with the polar vortex is bringing days of life-threatening temperatures to much of the country. Temperatures are expected to remain below average for 200 million people, causing ice and snow to refreeze and potentially exacerbating widespread power outages in the South that were caused by the sprawling system.