Heat Advisory
2026-07-22T23:00:00-07:00

* WHAT...Temperatures as high as 95 to 100 degrees. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge and the Hood River Valley, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, and South Washington Cascade Foothills. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Smoke from fires outside of the region or clouds moving into the area could result in cooler daytime high temperatures than currently forecast. There is around a 15-25% chance of thunderstorms on Wednesday afternoon which may increase cloud cover and thus cause temperatures to be slightly lower than forecast.

Realtime Data

Oregon

Clackamas River

Explore Interactive Map

Heat Advisory
Until 2026-07-22T23:00:00-07:00 • National Weather Service
* WHAT...Temperatures as high as 95 to 100 degrees. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge and the Hood River Valley, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, and South Washington Cascade Foothills. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Smoke from fires outside of the region or clouds moving into the area could result in cooler daytime high temperatures than currently forecast. There is around a 15-25% chance of thunderstorms on Wednesday afternoon which may increase cloud cover and thus cause temperatures to be slightly lower than forecast.

CLACKAMAS RIVER NEAR OREGON CITY, OR

Realtime Data • Report • Conditions

711

Discharge (cfs)

22.9

Gauge Height (ft)

USGS 14211010

Streamflow discharge was last observed at 711 cfs, and a gauge height of 22.94 feet. With the % decrease since yesterday, the streamflow average over the past 10 days is 778 .

Weather today, Tomorrow,

The river is a tributary of the Willamette River and is fed by both melting snow and rainwater. The river is also home to several hydroelectric dams, including the River Mill Dam and the North Fork Dam. Seasonal trends show that the flow rate of the river is highest in the winter and spring months and lowest in the summer months. Interestingly, the Clackamas River was named after a Native American tribe that lived in the area known as the Clackamas people.

July 22, 2026

Elevation	25.0 ft
Last Updated
Colored dissolved organic matter (CDOM), water, in situ, single band excitation, fluorescence emission, ppb QSE	3.91 ug/l QSE
Gage height, ft	22.94 ft
Chlorophyll a, estimated, water, in-situ, in-vivo fluorescence (IVF), relative fluorescence units (RFU)	0.28 RFU
Chlorophyll a, estimated, water, in-situ, in-vivo fluorescence (IVF), concentration estimated from reference material, micrograms per liter	0.21 ug/l
Streamflow, ft³/s	711.0 ft3/s
Phycocyanins (cyanobacteria), water, in situ, fluorometric method, excitation at 590 ±15 nm, emission at 685 ±20 nm, micrograms per liter	0.22 ug/l
Specific conductance, water, unfiltered, microsiemens per centimeter at 25°C	72.0 uS/cm @25C
Dissolved oxygen, water, unfiltered, mg/L	8.2 mg/l
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 ±2.5°, formazin nephelometric units (FNU)	0.3 FNU
pH, water, unfiltered, field, standard units	8.0 std units
Temperature, water, °C	23.4 deg C
Phycocyanins (cyanobacteria), water, in situ, fluorometric method, excitation at 590 ±15 nm, emission at 685 ±20 nm, relative fluorescence units (RFU)	0.16 RFU
Percent of Normal	70%
Year Over Year Average	1,020 cfs
24hr Flow Prediction	cfs
Maximum Recorded	59,900 cfs

SNOFLO^®

Clackamas River Near Oregon City, Or Realtime Data

CLACKAMAS RIVER NEAR OREGON CITY, OR

Realtime Data • Report • Conditions

711

Discharge (cfs)

22.9

Gauge Height (ft)

July 22, 2026

Seasonal Comparison

Oceanic Nino Index

SNOFLO®

Clackamas River Near Oregon City, Or Realtime Data

CLACKAMAS RIVER NEAR OREGON CITY, OR

Realtime Data • Report • Conditions

711

Discharge (cfs)

22.9

Gauge Height (ft)

July 22, 2026

Seasonal Comparison

Oceanic Nino Index

$4.99

$3.99

Per Month

SNOFLO^®