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Jed Boal reportingA still unidentified person is dead from a two car collision in Magna. One driver failed to stop at an intersection. Another driver couldn't stop in time and broadsided the car.
The Utah Highway Patrol says fog was a factor.
That was just one of many weather- related collisions. If you were out today, you probably ran into a wall of fog at some point.
The fog is likely to stick around. The snow started melting, the air cooled and put a lot of condensation into the air.
This looks like a year for Rudolph the red-nosed reindeer. If this fog lasts another 48 hours, he'll certainly have to lead Santa's sliegh through the thick soup of Salt Lake.
If you were out on the road at rush hour, there was little rush to it.
Amy Crawley/Driver: "Scarey. And definitely foggy. Visibility was crazy."
Cars were stacked up on the interstates, just inching along. Visibility at times was 100 yards or less.
"Oh my gosh, I probably couldn't see 30 feet in front of me."
And that's not a lot of room for error. Several cars slammed into each other on I-15 near 13th South. It left a few banged up bumpers, but no one was hurt.
As temperatures cooled this afternoon, the fog rolled in quickly, covering most of the valley at first, then lingering in patches.
Out at the airport-- well, you couldn't even see the airport. But planes were landing and taking off.
Kari Strong, her husband, and her dog Lilly waited patiently after a white-knuckle drive from West Bountiful.
Kari Strong/Driver: "It was creeping. I had to keep putting my brakes on a lot because you can't see more than a car in front, especially when you came right into the airport. You could not see anything in front of you."
Some people waited a half-hour or more. And some flights were delayed.