Station Name: COAST FORK WILLAMETTE R BLW COTTAGE GROVE DAM, OR
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 738 feet

Nearest Address:
75800 Reservoir Rd
Cottage Grove, OR 97424
Lane County

GPS Coordinates: 43.72067785, -123.0497994

Nearby Water Temperatures

Dense Fog Advisory issued January 12 at 2:45PM PST until January 13 at 11:00AM PST by NWS Portland OR

Effective: Mon January 12, 2026, 2:45 PM
Expires: Tue January 13, 2026, 7:00 AM

* WHAT...For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. * WHERE...Central and Southern Willamette Valley, Tualatin Valley, Portland West Hills and Chehalem Mountain, Inner Portland Metro, North Clark County Lowlands, and Inner Vancouver Metro. * WHEN...For the Air Stagnation Advisory, until 4 AM PST Friday. For the Dense Fog Advisory, from 10 PM this evening to 11 AM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

State air quality agencies highly recommend that no outdoor burning occur and that residential wood burning devices be limited as much as possible. According to state air quality agencies, prolonged periods of stagnant air can hold pollutants close to the ground where people live and breathe. Check with your local burn agency for any current restrictions in your area. People with respiratory illness should follow their physician's advice for dealing with high levels of air pollution during periods of stagnant air, especially if an Air Quality Alert is in effect for your area. To see if an Air Quality Alert is in effect for your area, go to www.weather.gov/pqr and left-click your location on the homepage map display. Alternatively, you could also type your location into the search bar found on the top-left hand side of the homepage. From there, you will see an Air Quality Alert listed at the top if one is in effect for your location; you can click the alert to read more details if applicable. If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions.

Air Stagnation Advisory issued January 12 at 2:45PM PST until January 16 at 4:00AM PST by NWS Portland OR

Effective: Mon January 12, 2026, 2:45 PM
Expires: Tue January 13, 2026, 7:00 AM

* WHAT...For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. * WHERE...Central and Southern Willamette Valley, Tualatin Valley, Portland West Hills and Chehalem Mountain, Inner Portland Metro, North Clark County Lowlands, and Inner Vancouver Metro. * WHEN...For the Air Stagnation Advisory, until 4 AM PST Friday. For the Dense Fog Advisory, from 10 PM this evening to 11 AM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

State air quality agencies highly recommend that no outdoor burning occur and that residential wood burning devices be limited as much as possible. According to state air quality agencies, prolonged periods of stagnant air can hold pollutants close to the ground where people live and breathe. Check with your local burn agency for any current restrictions in your area. People with respiratory illness should follow their physician's advice for dealing with high levels of air pollution during periods of stagnant air, especially if an Air Quality Alert is in effect for your area. To see if an Air Quality Alert is in effect for your area, go to www.weather.gov/pqr and left-click your location on the homepage map display. Alternatively, you could also type your location into the search bar found on the top-left hand side of the homepage. From there, you will see an Air Quality Alert listed at the top if one is in effect for your location; you can click the alert to read more details if applicable. If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions.

Dense Fog Advisory issued January 13 at 4:06AM PST until January 13 at 11:00AM PST by NWS Portland OR

Effective: Tue January 13, 2026, 4:06 AM
Expires: Tue January 13, 2026, 11:00 AM

* WHAT...Visibility one quarter mile or less in areas of dense fog. * WHERE...North and Central Coast Range Valleys of Oregon. * WHEN...Until 11 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions.

Freezing Fog Advisory issued January 13 at 4:06AM PST until January 13 at 11:00AM PST by NWS Portland OR

Effective: Tue January 13, 2026, 4:06 AM
Expires: Tue January 13, 2026, 11:15 AM

* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in areas of dense freezing fog with surface temperatures between 28 and 32 degrees. For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. * WHERE...South Willamette Valley. * WHEN...For the Freezing Fog Advisory, until 11 AM PST this morning. For the Air Stagnation Advisory, until 4 AM PST Friday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Rime ice is possible where fog is most dense and temperatures are coldest, which can create slick spots on surfaces.

State air quality agencies highly recommend that no outdoor burning occur and that residential wood burning devices be limited as much as possible. According to state air quality agencies, prolonged periods of stagnant air can hold pollutants close to the ground where people live and breathe. Check with your local burn agency for any current restrictions in your area. People with respiratory illness should follow their physician's advice for dealing with high levels of air pollution during periods of stagnant air, especially if an Air Quality Alert is in effect for your area. To see if an Air Quality Alert is in effect for your area, go to www.weather.gov/pqr and left-click your location on the homepage map display. Alternatively, you could also type your location into the search bar found on the top-left hand side of the homepage. From there, you will see an Air Quality Alert listed at the top if one is in effect for your location; you can click the alert to read more details if applicable. If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions.

Air Stagnation Advisory issued January 13 at 4:06AM PST until January 16 at 4:00AM PST by NWS Portland OR

Effective: Tue January 13, 2026, 4:06 AM
Expires: Tue January 13, 2026, 11:15 AM

* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in areas of dense freezing fog with surface temperatures between 28 and 32 degrees. For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. * WHERE...South Willamette Valley. * WHEN...For the Freezing Fog Advisory, until 11 AM PST this morning. For the Air Stagnation Advisory, until 4 AM PST Friday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Rime ice is possible where fog is most dense and temperatures are coldest, which can create slick spots on surfaces.

State air quality agencies highly recommend that no outdoor burning occur and that residential wood burning devices be limited as much as possible. According to state air quality agencies, prolonged periods of stagnant air can hold pollutants close to the ground where people live and breathe. Check with your local burn agency for any current restrictions in your area. People with respiratory illness should follow their physician's advice for dealing with high levels of air pollution during periods of stagnant air, especially if an Air Quality Alert is in effect for your area. To see if an Air Quality Alert is in effect for your area, go to www.weather.gov/pqr and left-click your location on the homepage map display. Alternatively, you could also type your location into the search bar found on the top-left hand side of the homepage. From there, you will see an Air Quality Alert listed at the top if one is in effect for your location; you can click the alert to read more details if applicable. If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions.

Air Stagnation Advisory issued January 12 at 2:53PM PST until January 16 at 4:00AM PST by NWS Medford OR

Effective: Mon January 12, 2026, 2:53 PM
Expires: Tue January 13, 2026, 4:00 AM

* WHAT...Poor air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants Within the valleys in Douglas County. * WHERE...Within the valleys of Douglas County. * WHEN...Until 4 AM PST Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Most outdoor burning will likely be prohibited as poor ventilation continues.

Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution during periods of stagnant air.

Air Stagnation Advisory issued January 13 at 3:04AM PST until January 16 at 10:00AM PST by NWS Medford OR

Effective: Tue January 13, 2026, 3:04 AM
Expires: Tue January 13, 2026, 4:00 PM

* WHAT...Poor air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants Within the valleys in Douglas County. * WHERE...Within the valleys of Douglas County. * WHEN...Until 10 AM PST Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Most outdoor burning will likely be prohibited as poor ventilation continues. * ADDITIONAL DETAILS...A strong area of high pressure remains in place. This will lead to poor mixing of the atmosphere and the trapping of pollutants. The high looks to stay in place through the week ahead.

Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution during periods of stagnant air. If driving, slow down, use your headlights, and leave plenty of distance ahead of you. Use caution when traveling in the morning.