The nation's next significant storm could blast millions of people with snow, severe weather and flooding starting Wednesday, while dangerous snow squalls associated with a clipper system sweep across the Northeast Tuesday morning.

Tornado risk area expands. The area at higher risk for tornadoes grows from January to February as the jet stream begins to shift and warm, humid air from the Gulf of Mexico surges north as low-pressure systems track eastward across the U.S.

Next major winter storm in the US set to blast millions with flooding rain, snow - The system brought heavy rain to wildfire-ravaged areas of Southern California after months without precipitation