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- River Levels & Flood Stages
Floods can occur in any month, but most commonly occur between November and February during periods of heavy rain or rapid snow melt. During a flood, agencies respond in four phases depending on the severity of expected flooding, with Phase 4 being the most severe.
During phases 2, 3, 4, flood updates and warnings are reported to police, fire departments, schools, other agencies, and news media.
See left sidebar for phase and river levels at gauge sites in Snohomish County.
Phase | Description |
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Phase 1 |
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Phase 2 |
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Phase 3 |
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Phase 4 |
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