Whiteout conditions on the Glenn Highway prompted warnings from Anchorage officials Thursday for drivers to proceed with caution, as commuters faced difficult driving conditions on many of the city's busiest roads.
An 18-wheeler was "on its side and numerous other vehicles in the ditch" on the outbound Glenn Highway, between the North and South Birchwood exits, the Anchorage Police Department said in an alert.
Tammy Sunderland said in a Facebook message that she left Palmer at 1 p.m. and had just arrived in Anchorage at 3:30 p.m.
The visibility was so bad that in some areas that "you can't see your hood where the snow is even just slightly blowing," Sunderland said.
Sunderland counted 26 vehicles in the ditch, including the overturned 18-wheeler.
"Traffic was backed up miles on the north bound side," she said.
Whiteout conditions start on the Glenn Highway at the Bragaw Street exit, according to police.
"Turn on your headlights and please drive with caution," police wrote.
Across Anchorage, commuters faced difficult driving conditions Thursday evening on several of the city's busiest corridors, including Minnesota Drive, Tudor Road and the Seward Highway, according to the state's traveler information website.
More snowfall was likely until midnight Thursday, with isolated snow showers between midnight and 3 a.m., according to the National Weather Service. Accumulation of less than an inch was expected.