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

High Surf Advisory issued January 6 at 3:39PM PST until January 8 at 4:00PM PST by NWS Portland OR

Effective: Tue January 6, 2026, 3:39 PM
Expires: Wed January 7, 2026, 4:00 PM

* WHAT...Large waves and hazardous surf conditions. Breakers up to 25 feet. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...From 10 AM Wednesday to 4 PM PST Thursday. * IMPACTS...Destructive waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties and drown while observing high surf. Minor beach erosion may damage coastal properties and buildings. Higher than normal water run-up is expected on beaches and low- lying shoreline. * ADDITIONAL DETAILS...The largest waves are expected to occur between 4 PM Wednesday and 7 AM Thursday.

A High Surf Advisory means that high surf will affect beaches, producing rip currents, sneaker waves and beach erosion. Stay well back from the water's edge and be alert for exceptionally high waves. Keep away from large logs on the beach. Water running up on the beach can easily lift or roll logs which can injure or kill someone caught in their path.

Winter Storm Warning issued January 6 at 1:43PM PST until January 8 at 4:00PM PST by NWS Portland OR

Effective: Tue January 6, 2026, 1:43 PM
Expires: Wed January 7, 2026, 6:00 AM

* WHAT...Heavy snow. Snow accumulations between 1 and 3 feet. Up to 4 feet of snow above 5000 feet in elevation. Winds gusting as high as 45 mph. * WHERE...South Washington Cascades and the Northern and Central Cascades of Oregon. * WHEN...Until 4 PM PST Thursday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. * ADDITIONAL DETAILS...Gusty winds and falling snow may reduce visibility at times. Low probability of impactful visibility reduction below 4500 feet in elevation.

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. If you are using a generator, be sure to keep it outdoors and away from windows and vents. Be aware that walking surfaces may be slick. Walk with extra care. Backcountry recreation is not advised.

Winter Storm Warning issued January 6 at 3:04PM PST until January 8 at 10:00AM PST by NWS Medford OR

Effective: Tue January 6, 2026, 3:04 PM
Expires: Wed January 7, 2026, 4:15 AM

Two fronts will bring impactful winter weather to the Cascades later tonight and again on Wednesday evening. Snow levels will fall to 2000 feet on Wednesday with snow possibly falling to the valley floors Wednesday night. * WHAT...Heavy snow expected. Total snow accumulations 8 to 24 inches, with 19 to 23 inches in Crater Lake National Park and 8 to 11 inches over Mount Ashland ski park. Winds gusting as high as 45 mph over high and exposed terrain. * WHERE...The southern Oregon Cascades and Siskiyou Mountains. Including the locations of...Crescent Lake, Diamond Lake, Union Creek, Howard Prairie. This also includes the following passes or notable locations... Siskiyou Pass on I-5 at 4310 ft. Lake of the Woods on 140 at 5070 ft. Diamond Lake Junction on state highways 230 & 138 at 4478 ft. Mt. Ashland ski road and lodge at 6500 ft. Caves National Monument near highway 46 at 4000 ft. Willamette Pass on state highway 58 at 5090 ft. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Travel may be very difficult to impossible. Road or highway closures are possible with feet of snow accumulation. The hazardous conditions could impact the Tuesday evening and Wednesday morning commutes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Probability of snow accumulation between 4 PM Tuesday to 4 PM Thursday. Probabilities don't always overlap the hazard's time range. Location >= >= >= >= 2in 8in 12in 18in -------- ---- ---- ---- ---- Siskiyou 78% 4% 0% 0% Pass Lake of 100% 54% 44% 35% the Woods Diamond 100% 99% 67% 42% Lake Junction Mt. A 100% 37% 15% 0% Lodge Crater 100% 97% 66% 44% Lake Visit weather.gov/mfr/winter for additional snow probabilities

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 511 or visit tripcheck.com for road information.

Winter Storm Warning issued January 6 at 3:04PM PST until January 8 at 10:00AM PST by NWS Medford OR

Effective: Tue January 6, 2026, 3:04 PM
Expires: Wed January 7, 2026, 4:15 AM

Two fronts will bring impactful winter weather to the Cascades later tonight and again on Wednesday evening. Snow levels will fall to 2000 feet on Wednesday with snow possibly falling to the valley floors Wednesday night. * WHAT...Heavy snow expected above 2000 feet in the Douglas County Cascade foothills. Total snow accumulations 6 to 8 inches. * WHERE...Above 2000 feet in the Douglas County Foothills Including the locations of...Toketee Falls. * WHEN...From 1 PM Wednesday to 10 AM PST Thursday. * IMPACTS...Travel may be difficult and delays in your commute. The hazardous conditions could impact the Wednesday evening commute. * ADDITIONAL DETAILS...Visit weather.gov/mfr/winter for additional snow probabilities

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 511 or visit tripcheck.com for road information.

High Surf Advisory issued January 6 at 2:03PM PST until January 8 at 4:00PM PST by NWS Medford OR

Effective: Tue January 6, 2026, 2:03 PM
Expires: Wed January 7, 2026, 4:15 AM

* WHAT...Large breaking waves of 22 to 26 feet. * WHERE...The beaches and shorelines of Curry, Coos, and Douglas counties in southern Oregon. * WHEN...From 4 AM Wednesday to 4 PM PST Thursday. * IMPACTS...Large breaking waves will create hazardous conditions along and within the surf zone, and could inundate beaches and low lying shorelines. Beach erosion is possible, and exposed infrastructure may be damaged. * ADDITIONAL DETAILS...The threat of sneaker waves increases tonight as the first swells arrive, then widespread dangerous surf is expected Wednesday into Thursday. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

Stay away from the surf zone and off of jetties. Area beaches may become hazardous due to dangerous surf conditions.

Winter Storm Warning issued January 6 at 10:13PM PST until January 8 at 10:00AM PST by NWS Medford OR

Effective: Tue January 6, 2026, 10:13 PM
Expires: Wed January 7, 2026, 8:00 AM

Two fronts will bring impactful winter weather to the area. The first overnight, and the second Wednesday afternoon into Thursday morning. Snow levels of 4500 feet will fall to 3500 feet overnight. Then, snow levels begin at 3000 feet Wednesday afternoon before falling as low as 1500 feet on Thursday morning, with significant snow for west side areas and northern Klamath County at elevations above 2000 feet. * WHAT...Heavy snow expected. Total snow accumulations 8 to 24 inches, with 18 to 24 inches in Crater Lake National Park, 10 to 15 inches at Lake of the Woods, 8 to 12 inches over Mount Ashland ski park, and 3 to 6 inches over Siskiyou Summit. Winds gusting as high as 45 mph over high and exposed terrain. Snow will be heaviest overnight through around 6 AM PST Wednesday, and especially from 1 PM PST Wednesday through 1 AM PST Thursday. * WHERE...The southern Oregon Cascades and Siskiyou Mountains. Including the locations of...Crescent Lake, Diamond Lake, Union Creek, Howard Prairie. This also includes the following passes or notable locations... Siskiyou Pass on I-5 at 4310 ft. Lake of the Woods on 140 at 5070 ft. Diamond Lake Junction on state highways 230 & 138 at 4478 ft. Mt. Ashland ski road and lodge at 6500 ft. Caves National Monument near highway 46 at 4000 ft. Willamette Pass on state highway 58 at 5090 ft. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Travel may be very difficult to impossible. Road or highway closures are possible with feet of snow accumulation. The hazardous conditions could impact the Tuesday evening and Wednesday morning commutes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Probability of snow accumulation between 4 PM Tuesday to 4 PM Thursday. Probabilities don't always overlap the hazard's time range. Location >= >= >= >= 2in 8in 12in 18in -------- ---- ---- ---- ---- Siskiyou 78% 4% 0% 0% Pass Lake of 100% 54% 44% 35% the Woods Diamond 100% 99% 67% 42% Lake Junction Mt. A 100% 37% 15% 0% Lodge Crater 100% 97% 66% 44% Lake Visit weather.gov/mfr/winter for additional snow probabilities

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 511 or visit tripcheck.com for road information.

Winter Storm Warning issued January 6 at 10:13PM PST until January 8 at 10:00AM PST by NWS Medford OR

Effective: Tue January 6, 2026, 10:13 PM
Expires: Wed January 7, 2026, 8:00 AM

Two fronts will bring impactful winter weather to the area. The first overnight, and the second Wednesday afternoon into Thursday morning. Snow levels of 4500 feet will fall to 3500 feet overnight. Then, snow levels begin at 3000 feet Wednesday afternoon before falling as low as 1500 feet on Thursday morning, with significant snow for west side areas and northern Klamath County at elevations above 2000 feet. * WHAT...Heavy snow expected above 2000 feet in the Douglas County Cascade foothills. Total snow accumulations 4 to 8 inches. Snow levels of 3000 feet Wednesday afternoon will fall to 2000 feet during Wednesday evening, then will drop as low as 1500 feet as snow intensity decreases on Thursday morning. * WHERE...Above 2000 feet in the Douglas County cascade foothills Including the locations of...Toketee Falls and highway 138. * WHEN...From 1 PM Wednesday to 10 AM PST Thursday. * IMPACTS...Travel may be very difficult to impossible. The hazardous conditions could impact the Wednesday evening and Thursday morning commutes. * ADDITIONAL DETAILS...Visit weather.gov/mfr/winter for additional snow probabilities

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 511 or visit tripcheck.com for road information.