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NOAA Current Watches-OR

Freezing Fog Advisory issued December 2 at 8:14PM PST until December 3 at 11:00AM PST by NWS Portland OR

2 weeks 6 days ago
* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in areas of dense freezing fog. For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...West Central Willamette Valley. * WHEN...For the Freezing Fog Advisory, until 11 AM PST Tuesday. For the Air Stagnation Advisory, until 4 AM PST Thursday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility in areas of dense freezing fog could make driving conditions hazardous. * ADDITIONAL DETAILS...Frost is possible on elevated surfaces and grassy surfaces, as well as bridges and overpasses.
NWS

Air Stagnation Advisory issued December 2 at 4:44PM PST until December 5 at 4:00AM PST by NWS Portland OR

2 weeks 6 days ago
* WHAT...For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants 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, Tualatin Valley, Outer Southeast Portland Metro, West Central Willamette Valley, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.
NWS

Air Stagnation Advisory issued December 2 at 4:44PM PST until December 5 at 4:00AM PST by NWS Portland OR

2 weeks 6 days ago
* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in areas of dense freezing fog. For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...South Willamette Valley, and East Central Willamette Valley. * WHEN...For the Freezing Fog Advisory, until 11 AM PST Tuesday. For the Air Stagnation Advisory, until 4 AM PST Thursday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility in areas of dense freezing fog could make driving conditions hazardous. * ADDITIONAL DETAILS...Dense fog will impact portions of the I-5 corridor from Salem to Eugene. Frost is possible on elevated surfaces and grassy surfaces, as well as bridges and overpasses.
NWS

Freezing Fog Advisory issued December 2 at 4:44PM PST until December 3 at 11:00AM PST by NWS Portland OR

2 weeks 6 days ago
* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in areas of dense freezing fog. For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...South Willamette Valley, and East Central Willamette Valley. * WHEN...For the Freezing Fog Advisory, until 11 AM PST Tuesday. For the Air Stagnation Advisory, until 4 AM PST Thursday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility in areas of dense freezing fog could make driving conditions hazardous. * ADDITIONAL DETAILS...Dense fog will impact portions of the I-5 corridor from Salem to Eugene. Frost is possible on elevated surfaces and grassy surfaces, as well as bridges and overpasses.
NWS

Air Stagnation Advisory issued December 2 at 3:55PM PST until December 4 at 4:00PM PST by NWS Medford OR

2 weeks 6 days ago
* WHAT...A ridge of high pressure will lead to a strong inversion and stagnant air conditions near the surface that will continue to trap pollutants. This could worsen air quality over time. * WHERE...Valley locations across southern Oregon. West of the Cascades, this includes the Umpqua, Illinois, Applegate, and Rogue valleys. East of the Cascades, this includes Klamath Falls, Sprague River, Chiloquin, Chemult, Silver Lake, Paisley, and surrounding areas. * WHEN...Until 4 PM PST Wednesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
NWS

Frost Advisory issued December 2 at 3:55PM PST until December 3 at 9:00AM PST by NWS Medford OR

2 weeks 6 days ago
* WHAT...Temperatures of 33 to 36 degrees Fahrenheit will result in frost formation. * WHERE...South Central Oregon Coast, including all coastal areas from Port Orford north to around Reedsport as well as the Coquille Valley. * WHEN...From 11 PM this evening to 9 AM PST Tuesday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...A few of the typically colder locations could fall to freezing.
NWS

Air Stagnation Advisory issued December 2 at 4:53PM MST until December 6 at 9:00PM MST by NWS Boise ID

2 weeks 6 days ago
* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants in valleys. * WHERE...Portions of south central, southwest, and west central Idaho and northeast and southeast Oregon. * WHEN...Until 9 PM MST /8 PM PST/ Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
NWS

Air Stagnation Advisory issued December 2 at 4:53PM MST until December 6 at 9:00PM MST by NWS Boise ID

2 weeks 6 days ago
* WHAT...For the Dense Fog Advisory, visibility a quarter mile or less in dense fog is expected for the Tuesday morning. For the Air Stagnation Advisory in valleys, an extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Treasure Valley Zones. * WHEN...For the Dense Fog Advisory, until 11 AM MST Tuesday. For the Air Stagnation Advisory, until 9 PM MST Friday. * IMPACTS...Low visibility could make driving conditions hazardous especially for the morning commute between Ontario, Oregon and Mountain Home. Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.
NWS

Dense Fog Advisory issued December 2 at 4:53PM MST until December 3 at 11:00AM MST by NWS Boise ID

2 weeks 6 days ago
* WHAT...For the Dense Fog Advisory, visibility a quarter mile or less in dense fog is expected for the Tuesday morning. For the Air Stagnation Advisory in valleys, an extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Treasure Valley Zones. * WHEN...For the Dense Fog Advisory, until 11 AM MST Tuesday. For the Air Stagnation Advisory, until 9 PM MST Friday. * IMPACTS...Low visibility could make driving conditions hazardous especially for the morning commute between Ontario, Oregon and Mountain Home. Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.
NWS

Air Stagnation Advisory issued December 2 at 1:52PM MST until December 6 at 9:00PM MST by NWS Boise ID

2 weeks 6 days ago
* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants in valleys. * WHERE...Portions of south central, southwest, and west central Idaho and northeast and southeast Oregon. * WHEN...Until 9 PM MST /8 PM PST/ Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
NWS

Air Stagnation Advisory issued December 2 at 1:52PM MST until December 6 at 9:00PM MST by NWS Boise ID

2 weeks 6 days ago
* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants in valleys. Dense fog has decreased this afternoon, but will likely increase again this evening through Tuesday. * WHERE...Lower Treasure Valley Zones. * WHEN...Until 9 PM MST Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
NWS

Air Stagnation Advisory issued December 2 at 10:54AM PST until December 5 at 4:00AM PST by NWS Portland OR

2 weeks 6 days ago
* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants 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, Tualatin Valley, Outer Southeast Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
NWS

Air Stagnation Advisory issued December 2 at 8:47AM PST until December 4 at 4:00PM PST by NWS Medford OR

2 weeks 6 days ago
* WHAT...A ridge of high pressure will lead to a strong inversion and stagnant air conditions near the surface that will continue to trap pollutants. This could worsen air quality over time. * WHERE...Valley locations across southern Oregon. West of the Cascades, this includes the Umpqua, Illinois, Applegate, and Rogue valleys. East of the Cascades, this includes Klamath Falls, Sprague River, Chiloquin, Chemult, Silver Lake, Paisley, and surrounding areas. * WHEN...For the Cold Weather Advisory, from 2 AM to 8 AM PST Monday. For the Air Stagnation Advisory, until 4 PM PST Wednesday. * IMPACTS...Low visibility could make driving conditions hazardous. Watch for icy spots on roads. Poor air quality may cause issues for people with respiratory problems.
NWS
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