* WHAT...Very cold temperatures as low as 20 degrees F.

* WHERE...Central and Southern Willamette Valley, Northern and Central Coast Range Valleys and Mountains of Oregon, Foothills of the Northern and Central Oregon Cascades, Willapa Hills and Adjacent River Valleys of Pacific and Wahkiakum Counties, Lower Columbia River and Cowlitz River Valleys, Outer Southeast Portland Metro, North Clark County Lowlands, and South Washington Cascade Foothills.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Wind chill values can lead to hypothermia with prolonged exposure.

* ADDITIONAL DETAILS...Reduced wind speeds have kept temperatures slightly warmer than previous evenings. Areas experiencing the coldest temperatures are around the mouth of the Columbia River Gorge and more rural areas. Locations with higher wind speeds are experiencing apparent ("feels-like") temperatures near 30 degrees F.