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

Elevation Above Sea Level: 738 feet / 225 meters

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

GPS Coordinates: 43.72067785, -123.0497994

Nearby Water Temperatures

Extreme Heat Warning issued August 21 at 1:16AM PDT until August 26 at 5:00AM PDT by NWS Portland OR

Effective: Thu August 21, 2025, 1:16 AM
Expires: Thu August 21, 2025, 5:15 PM

* WHAT...Dangerously hot conditions with high temperatures of 95-103F and overnight low temperatures of 60-70F possible. The warmest overnight lows will occur in urban areas to the north of Salem and in the Columbia River Gorge. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge, the Corbett area and the Hood River Valley, Central and Southern Willamette Valley, and Foothills of the Northern and Central Oregon Cascades. * WHEN...From 11 AM Friday to 5 AM PDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, especially for those spending time outdoors or without access to adequate cooling. * ADDITIONAL DETAILS...Friday and Saturday will be the hottest days.

Drink plenty of fluids, stay in a cool place during the heat of the day, stay out of the sunshine, and check up on relatives and neighbors. For those without air conditioning, use fans to keep air moving. Keeps windows closed during the day and open at night, unless air quality is degraded due to wildfire smoke. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Heat Advisory issued August 21 at 1:16AM PDT until August 26 at 5:00AM PDT by NWS Portland OR

Effective: Thu August 21, 2025, 1:16 AM
Expires: Thu August 21, 2025, 5:15 PM

* WHAT...Dangerously hot conditions with high temperatures up to 92-96F and overnight low temperatures of 60-68F possible. * WHERE...South Washington Cascades and the Northern and Central Cascades of Oregon for elevations below 3500 feet, North and Central Coast Range Valleys of Oregon, and Willapa and Wahkiakum Lowlands. * WHEN...From 11 AM Friday to 5 AM PDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, especially for those spending time outdoors or without access to adequate cooling. * ADDITIONAL DETAILS...Friday and Saturday will be the hottest days.

Drink plenty of fluids, stay in a cool place during the heat of the day, stay out of the sunshine, and check up on relatives and neighbors. For those without air conditioning, use fans to keep air moving. Keeps windows closed during the day and open at night, unless air quality is degraded due to wildfire smoke. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Heat Advisory issued August 21 at 7:44AM PDT until August 26 at 5:00AM PDT by NWS Portland OR

Effective: Thu August 21, 2025, 7:44 AM
Expires: Thu August 21, 2025, 8:00 PM

* WHAT...Dangerous hot conditions with high temperatures up to 93-98F and overnight low temperatures of 60-68F expected. * WHERE...South Washington Cascades and the Northern and Central Cascades of Oregon, North and Central Coast Range Valleys of Oregon, Willapa and Wahkiakum Lowlands, and South Washington Cascade Foothills. * WHEN...From 11 AM Friday to 5 AM PDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, especially for those spending time outdoors or without access to adequate cooling. * ADDITIONAL DETAILS...Friday and Saturday will be the hottest days. Overnight lows on the mid slopes of the Cascades could be as warm as 70F.

Drink plenty of fluids, stay in a cool place during the heat of the day, stay out of the sunshine, and check up on relatives and neighbors. For those without air conditioning, use fans to keep air moving. Keeps windows closed during the day and open at night, unless air quality is degraded due to wildfire smoke. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Extreme Heat Warning issued August 21 at 7:44AM PDT until August 26 at 5:00AM PDT by NWS Portland OR

Effective: Thu August 21, 2025, 7:44 AM
Expires: Thu August 21, 2025, 8:00 PM

* WHAT...Dangerously hot conditions with high temperatures of 95-103F and overnight low temperatures of 60-70F expected. The warmest overnight lows will occur in urban areas to the north of Salem and in the Columbia River Gorge. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge, the Corbett area and the Hood River Valley, Central and Southern Willamette Valley, and Foothills of the Northern and Central Oregon Cascades. * WHEN...From 11 AM Friday to 5 AM PDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, especially for those spending time outdoors or without access to adequate cooling. * ADDITIONAL DETAILS...Friday and Saturday will be the hottest days.

Drink plenty of fluids, stay in a cool place during the heat of the day, stay out of the sunshine, and check up on relatives and neighbors. For those without air conditioning, use fans to keep air moving. Keeps windows closed during the day and open at night, unless air quality is degraded due to wildfire smoke. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Red Flag Warning issued August 20 at 1:12PM PDT until August 21 at 8:00PM PDT by NWS Portland OR

Effective: Wed August 20, 2025, 1:12 PM
Expires: Thu August 21, 2025, 4:00 PM

The National Weather Service in Portland has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM to 8 PM PDT Thursday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Oregon, Fire Weather Zone 685 Southern Willamette Valley. * WINDS...North 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 15-25 percent. * IMPACTS...Conditions may be favorable for rapid fire spread which may threaten life and property. Use extra caution with potential ignition sources, especially in grassy areas. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of the above conditions can contribute to extreme fire behavior.