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| 22.0 |
the Snohomish River will cause severe flooding...with deep and swift flood waters inundating farm land...residential areas...and roads. Levees could suffer overtopping and major damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 22 feet at this location corresponds to Phase 4 in the Snohomish County Flood Warning System. |
| 21.0 |
Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. The Snohomish River stage at this location corresponds to Phase 4 in the Snohomish County Flood Warning System. |
| 20.0 |
the Snohomish River will cause severe flooding in the valley. The river will flood many homes...cover much of the farmlands...and close many roads. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 20 feet at this location corresponds to Phase 3 in the Snohomish County Flood Warning System. |
| 17.0 |
the Snohomish River will cause major flooding...inundating farm land...roads...and some residential areas. Levees will likely suffer damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 17 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System. |
| 16.0 |
the Snohomish River will flood several roads and much of the low pasture land in the river valley. A stage of 16 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System. |
| 15.0 |
the Snohomish River will cause minor flooding of low pasture lands and several roads near the river. A stage of 15 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System. |
| 14.0 |
feet...the Snohomish River will locally spill over its banks into low pasture lands along the river. |
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Latitude: 47.831100° N,
Longitude: 122.047000° W,
Horizontal Datum:
NAD83
River Stage
Reference Frame |
Gauge Height |
Flood Stage |
Uses |
| NWS stage |
0 ft |
15 ft |
Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps |
| Vertical Datum |
Elevation
(gauge height = 0) |
Elevation
(gauge height = flood stage) |
Elevation information source |
| NAVD88 |
N/A |
N/A |
Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps |
| NGVD 29 |
13.25 ft |
28.25 ft |
Older USGS topographic maps, NGVD29 benchmarks |
| MSL |
N/A |
N/A |
Older USGS topographic maps, MSL benchmarks |
| Other |
N/A |
N/A |
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Hydrologic Resources
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Additional Resources
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here. |
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NWS Information |
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weather.gov 
