Station Name: SOUTH FORK TOLT RIVER NEAR CARNATION, WA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 1,365 feet

Nearest Address:
Tolt Reservoir Rd
Carnation, WA 98014
King County

GPS Coordinates: 47.68926929, -121.7134457

Nearby Water Temperatures

Flood Watch issued March 18 at 3:54PM PDT until March 20 at 5:00PM PDT by NWS Seattle WA

Effective: Wed March 18, 2026, 3:54 PM
Expires: Thu March 19, 2026, 5:00 AM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northwest and west central Washington, including the following counties, in northwest Washington, Skagit and Whatcom. In west central Washington, King and Snohomish. * WHEN...Through Friday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - High snow levels, heavy rainfall, and snowmelt runoff will lead to continued rises on area rivers with additional flooding possible at times this week. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Flood Warning issued March 18 at 8:09PM PDT until March 22 at 2:49AM PDT by NWS Seattle WA

Effective: Wed March 18, 2026, 8:09 PM
Expires: Thu March 19, 2026, 4:15 AM

...The Flood Warning continues for the following rivers in Washington... Snoqualmie River Near Carnation affecting King County. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Snoqualmie River near Carnation. * WHEN...Until early Sunday morning. * IMPACTS...At 56.0 feet, the Snoqualmie River will cause widespread flooding from Fall City downstream through Carnation and Duvall... inundating much of the farm land and numerous roads. * ADDITIONAL DETAILS... - At 6:15 PM PDT Wednesday the stage was 55.2 feet. - Flood stage is 54.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 6:15 PM PDT Wednesday was 55.2 feet. - Forecast...The river is expected to rise to 56.8 feet by early Thursday morning before falling throughout the day, getting below flood stage by Thursday evening at 53.3 feet. It will rise again overnight Thursday and into Friday morning before cresting again at 57.1 feet Saturday morning. It will return to below flood stage again early Saturday afternoon. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov. The next statement will be issued by late tonight at 415 AM PDT.

Flood Warning issued March 18 at 7:59PM PDT until March 21 at 3:59AM PDT by NWS Seattle WA

Effective: Wed March 18, 2026, 7:59 PM
Expires: Thu March 19, 2026, 4:00 AM

...The Flood Warning is extended for the following rivers in Washington... Tolt River Above Carnation affecting King County. * WHAT...Minor flooding is forecast. * WHERE...Tolt River above Carnation. * WHEN...Until early Saturday morning. * IMPACTS...At 5,000.0 cfs, the Tolt River will flood Tolt River Rd NE and many driveways. Some homes in the San Souci area could be inaccessible due to deep and quick flood waters. This river level on the Tolt corresponds to a phase 3 flood in the King County flood system. * ADDITIONAL DETAILS... - At 6:15 PM PDT Wednesday the flow was 4,230.0 cfs. - Flood flow is 5,000.0 cfs. - Forecast...The river will continue to fall, reaching its lowest flow at 3,343.7 cfs late tonight. It expected to begin rising again by early Thursday afternoon, achieving flood stage by late Friday morning and reaching a secondary crest at 5,447.4 cfs by late Friday afternoon. It will fall below flood stage again Friday night. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov. The next statement will be issued by late tonight at 400 AM PDT.

Flood Warning issued March 18 at 7:47PM PDT until March 21 at 11:00AM PDT by NWS Seattle WA

Effective: Wed March 18, 2026, 7:47 PM
Expires: Thu March 19, 2026, 4:00 AM

...The Flood Warning is extended for the following rivers in Washington... Snoqualmie River Near Snoqualmie Falls affecting King County. .Moderate to heavy rain continues over the Central Cascades. River flooding will continue on the Snoqualmie River near Snoqualmie Falls into tonight. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Snoqualmie River near Snoqualmie Falls. * WHEN...Until late Saturday morning. * IMPACTS...At 20,000.0 cfs, the Snoqualmie River will cause widespread flooding of pasture lands and roads along the river from the town of Snoqualmie downstream through Fall City. Roads that may become flooded include Fall City-Carnation...Tolt Hill... and Novelty Flats Roads. This river level on the Snoqualmie corresponds roughly to a phase 3 flood in the King County flood system. * ADDITIONAL DETAILS... - At 7:00 PM PDT Wednesday the flow was 23,100.0 cfs. - Flood flow is 20,000.0 cfs. - Recent Activity...The maximum river flow in the 24 hours ending at 7:00 PM PDT Wednesday was 23,700.0 cfs. - Forecast...The river is cresting this evening and will begin to see flow diminish overnight before falling below flood stage by Thursday morning. It will reach its lowest flow of 13,696 cfs Thursday afternoon before rising again. The river is expected to return to flood stage by early Friday morning. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov. The next statement will be issued by late tonight at 400 AM PDT.

Flood Watch issued March 19 at 3:31AM PDT until March 20 at 5:00PM PDT by NWS Seattle WA

Effective: Thu March 19, 2026, 3:31 AM
Expires: Thu March 19, 2026, 5:00 PM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northwest and west central Washington, including the following counties, in northwest Washington, Skagit and Whatcom. In west central Washington, King and Snohomish. * WHEN...Through Friday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - High snow levels, heavy rainfall, and snowmelt runoff will lead to continued rises on area rivers with additional flooding possible at times this week. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.