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Dense fog advisory and freezing fog advisory cause poor visibility for drivers

A dense fog advisory and a freezing fog advisory remain in effect until noon Thursday for much of Northwest Oregon and Southwest Washington. KATU photo

PORTLAND, Ore. – A dense fog advisory and a freezing fog advisory remain in effect until noon Thursday for much of Northwest Oregon and Southwest Washington.

The National Weather Service warn visibility will drop to less than a quarter of a mile in much of the Portland and Vancouver metro areas.

Drivers should also be careful on the roads and watch out for slick spots. Temperatures dropped well below freezing Wednesday night.

A freezing fog advisory means that very light ice accumulation is possible due to freezing fog.

A dense fog advisory means visibility will frequently be reduced to less than a quarter of a mile.

Motorists should slow down, use their headlights and leave plenty of space ahead of them.

The advisories impact the following locations:

  • Lower Columbia
  • Greater Portland metro area
  • Central Willamette Valley
  • I-5 corridor in Cowlitz County
  • Greater Vancouver Area
  • St. Helens
  • Clatskanie
  • Hillsboro
  • Portland
  • Wilsonville
  • Oregon City
  • Gresham
  • Troutdale
  • Salem
  • McMinnville
  • Woodburn
  • Stayton
  • Dallas
  • Longview
  • Kelso
  • Castle Rock
  • Vancouver
  • Battle Ground
  • Ridgefield
  • Washougal
  • Yacolt
  • Amboy
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