Flood Warning Washington | Effective 03/18/2026 19:47

Headline: 
Flood Warning issued March 18 at 7:47PM PDT until March 21 at 11:00AM PDT by NWS Seattle WA
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
March 18, 2026 - 7:47pm
Expires: 
March 19, 2026 - 4:00am
Description: 
...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
Instruction: 
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.
Area Description: 
King, WA
Forcast Office: 
NWS Seattle WA