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

Winter Storm Warning issued April 15 at 10:48PM PDT until April 16 at 5:00AM PDT by NWS Portland OR

Effective: Wed April 15, 2026, 10:48 PM
Expires: Thu April 16, 2026, 5:00 AM

* WHAT...Heavy snow above 2500 ft. Additional snow accumulations up to 2 to 4 inches. * WHERE...South Washington Cascades and the Northern and Central Cascades of Oregon. * WHEN...Until 5 AM PDT Thursday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.

Consider postponing travel until weather conditions improve. If you must travel, be sure to slow down and allow extra time. If your car becomes trapped in deep snow, be sure to keep your car off to stay safe from potential carbon monoxide poisoning. Be aware that walking surfaces may be slick. Walk with extra care. Backcountry recreation is not advised.

Frost Advisory issued April 15 at 9:24PM PDT until April 16 at 9:00AM PDT by NWS Portland OR

Effective: Wed April 15, 2026, 9:24 PM
Expires: Thu April 16, 2026, 9:00 AM

* WHAT...Temperatures of 32 to 36 degrees will result in frost formation. * WHERE...Central and Southern Willamette Valley, Northern and Central Coast Range Valleys and Mountains of Oregon, Lower Columbia River and Cowlitz River Valleys, Tualatin Valley, Portland West Hills and Chehalem Mountain, Willapa Hills, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...From 1 AM to 9 AM PDT Thursday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender outdoor plants from the cold. Consider temporarily moving outdoor potted plants indoors if they are sensitive to cold temperatures. Consider temporarily covering sensitive plants with a lightweight cotton fabric (i.e., bedsheets, thin blankets), as this will help retain heat and provide frost protection for your plants.

Freeze Watch issued April 15 at 9:24PM PDT until April 17 at 9:00AM PDT by NWS Portland OR

Effective: Wed April 15, 2026, 9:24 PM
Expires: Thu April 16, 2026, 9:30 AM

* WHAT...For the Freeze Warning, sub-freezing temperatures as low as 30 degrees. For the Freeze Watch, sub-freezing temperatures as low as 30 degrees possible. * WHERE...Cascade Foothills of Marion and Linn Counties and Lane County Cascade Foothills. * WHEN...For the Freeze Warning, until 9 AM PDT 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.

Take steps now to protect tender outdoor plants from the cold. Consider temporarily moving outdoor potted plants indoors if they are sensitive to cold temperatures. Consider temporarily covering sensitive plants with a lightweight cotton fabric (i.e., bedsheets, thin blankets), as this will help retain heat and provide frost protection for your plants.

Freeze Warning issued April 15 at 9:24PM PDT until April 16 at 9:00AM PDT by NWS Portland OR

Effective: Wed April 15, 2026, 9:24 PM
Expires: Thu April 16, 2026, 9:30 AM

* WHAT...For the Freeze Warning, sub-freezing temperatures as low as 30 degrees. For the Freeze Watch, sub-freezing temperatures as low as 30 degrees possible. * WHERE...Cascade Foothills of Marion and Linn Counties and Lane County Cascade Foothills. * WHEN...For the Freeze Warning, until 9 AM PDT 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.

Take steps now to protect tender outdoor plants from the cold. Consider temporarily moving outdoor potted plants indoors if they are sensitive to cold temperatures. Consider temporarily covering sensitive plants with a lightweight cotton fabric (i.e., bedsheets, thin blankets), as this will help retain heat and provide frost protection for your plants.

Winter Weather Advisory issued April 15 at 11:55AM PDT until April 16 at 5:00AM PDT by NWS Medford OR

Effective: Wed April 15, 2026, 11:55 AM
Expires: Thu April 16, 2026, 5:00 AM

* WHAT...Total snow accumulations 4 to 12 inches. Winds gusting as high as 45 mph over high and exposed terrain. * WHERE...Above 4000 ft in the high south central Cascades in Klamath, Jackson and Douglas Counties. Including the locations of...Crescent Lake, Diamond Lake. This also includes the following passes or notable locations... Diamond Lake Junction on state highways 230 & 138 at 4478 ft. Willamette Pass on state highway 58 at 5090 ft. * WHEN...Until 5 AM PDT Thursday. * IMPACTS...Plan on slippery road conditions and delays in your commute. The hazardous conditions could impact the Wednesday evening commute. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS... Visit weather.gov/mfr/winter for additional snow probabilities

Slow down and use caution while traveling. Call 511 or visit tripcheck.com for road information.