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Dense Fog Advisory issued September 26 at 2:43AM PDT until September 26 at 11:00AM PDT by NWS Portland OR* WHAT...Visibility less than one quarter mile in dense fog.* WHERE...In Oregon, East Central Willamette Valley, East PortlandMetro, Inner Portland Metro, Lower Columbia River, Outer SoutheastPortland Metro, Portland West Hills and Chehalem Mountain,Tualatin Valley, West Central Willamette Valley, Benton CountyLowlands, Lane County Lowlands, and Linn County Lowlands. InWashington, Cowlitz County Lowlands, East Clark County Lowlands,Inner Vancouver Metro, and North Clark County Lowlands.* WHEN...Until 11 AM PDT this morning.* IMPACTS...Low visibility could make driving conditions hazardous.* ADDITIONAL DETAILS...Wet conditions and cool overnighttemperatures are supporting patchy dense fog throughout theWillamette Valley and could be present during the morning commute.Fog should lift by mid to late morning.If driving, slow down, use your headlights, and leave plenty ofdistance ahead of you. Pedestrians and cyclists should wear brightor reflective clothing to increase the chances of being seen byothers in poor visibility conditions.

National Weather Service