"Far-reaching" winter storm to impact travel across the U.S.

A powerful storm system that's seen temperatures plummet in the Rockies is set to bring heavy rain across the Southeast "and a long stretch of wintry weather from the southern Plains to the interior Northeast," the National Weather Service warns.

What's happening: Per the NWS, the effects of the system will be "far-reaching" and impact travel in a vast area that's likely to affect millions of people. Multiple weather-related crashes have already been reported in Denver — including one fatality, per the Denver Post. The city's temperature fell 58 degrees from a "daily-record-tying high of 74 at 2 p.m. Sunday to 16 degrees by 8 p.m. Monday," the Washington Post notes.

Flashback... In photos: Impact of powerful Thanksgiving storms across the U.S.