Aggregator

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...South Willamette Valley. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...Yakima Valley and Lower Columbia Basin of Washington. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Multiple observations along I-82 between Richland and Yakima are currently showing visibilities of less than a quarter mile, which is expected to persist this evening and into Thursday morning. Air Temperatures are currently 32-34 in the area, but are anticipated to drop to between 25-30 degrees overnight.

* WHAT...A moderate risk of sneaker waves is expected. * WHERE...All beaches and shorelines of Douglas, Coos, and Curry counties. * WHEN...From Saturday evening through Sunday afternoon. * IMPACTS...Sneaker waves can run up significantly farther on beaches than normal, including over rocks and jetties. These waves can suddenly knock people off of their feet and quickly pull them into the cold ocean waters, resulting in serious injury or death. Waves may also lift driftwood logs, trapping anyone caught underneath. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, Tualatin Valley, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...From 4 PM this afternoon to 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...From 4 PM this afternoon to 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, Tualatin Valley, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...From 4 PM this afternoon to 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...From 4 PM this afternoon to 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...For the Frost Advisory, temperatures as low as 33 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 30 possible. * WHERE...South Central Oregon Coast. This includes the communities of North Bend, Port Orford, Myrtle Point, Powers, Reedsport, and Bandon. * WHEN...For the Frost Advisory, from 2 AM to 9 AM PST Thursday. For the Freeze Watch, from late Thursday night through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

* WHAT...For the Frost Advisory, temperatures as low as 33 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 30 possible. * WHERE...South Central Oregon Coast. This includes the communities of North Bend, Port Orford, Myrtle Point, Powers, Reedsport, and Bandon. * WHEN...For the Frost Advisory, from 2 AM to 9 AM PST Thursday. For the Freeze Watch, from late Thursday night through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...East Central Willamette Valley, Lane County Lowlands, and Linn County Lowlands. * WHEN...Until 11 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Yakima Valley. * WHEN...Until 9 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility of one-quarter mile or less in dense fog. * WHERE...Northern Blue Mountains of Oregon. * WHEN...Until noon PST today. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Visibility near zero has been observed along the slopes of the Northern Blues and along Interstate 84 in the vicinity of Cabbage Hill and Deadman Pass where low clouds are intersecting with the terrain.

Patchy dense fog with visibility of a quarter mile or less has been observed in the Kittitas Valley this morning. Be cautious when traveling and be prepared for sudden changes of visibility. Fog is expected to persist for the next couple of hours.

Patchy dense fog with visibility of a quarter mile or less have been observed in Yakima this morning. Be cautious when traveling and be prepared for sudden changes of visibility. Fog is expected to persist for the next several hours.

* WHAT...Visibility down to a quarter of a mile or less. * WHERE...Foothills of the Northern Blue Mountains of Oregon. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. Oregon Department of Transportation cameras along I-84 are showing poor visibilities from Pendleton up to the top of Cabbage Hill which is causing slow traffic.

* WHAT...Areas of fog, with visibility dropping to a quarter mile or less in dense fog. * WHERE...South Washington and North and Central Oregon Coast, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, Tualatin Valley, Inner Portland Metro, Outer Southeast Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and Inner Vancouver Metro. * WHEN...Until 11 AM PST Tuesday. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Areas of fog, with visibility dropping to a quarter mile or less in dense fog. * WHERE...South Washington and North and Central Oregon Coast, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, Tualatin Valley, Inner Portland Metro, Outer Southeast Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and Inner Vancouver Metro. * WHEN...Until 11 AM PST Tuesday. * IMPACTS...Low visibility could make driving conditions hazardous.

Patchy dense fog with near zero visibility in places will continue through the rest of the morning in the Moses Lake Area. Fog is particularly dense along State Route 17 between Othello and Moses Lake. Expect rapid changes in visibility in this area. Use extra caution, reduce speeds, and allow extra travel time. Fog is expected to lift this afternoon.

Patchy dense fog is expected through morning in the Yakima and Kittitas valleys and limited areas of the lower Columbia Basin. If traveling, be prepared for sudden changes in visibility.