AI Summary

A dense fog advisory was issued at 10:39 PM PDT on October 31, 2026, and will remain in effect until 10:00 AM PST on November 1. Visibility will be one quarter mile or less. The advisory covers parts of Oregon, including the East Central Willamette Valley, East Portland Metro, Inner Portland Metro, Lower Columbia River, Tualatin Valley, and West Central Willamette Valley. In Washington it applies to the Cowlitz County Lowlands, East Clark County Lowlands, Inner Vancouver Metro, and North Clark County Lowlands. The advisory warns of reduced visibility across these regions.

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