Major Flood
18 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
15 ft
Minor Flood
13.5 ft
Action Stage
12 ft
What Floods at Each Level
19 ft
expect major widespread flooding of lowland areas, along with flooding of some areas in and near Longview. Water levels have historically neared the tops of several levees at this stage.
18 ft
expect major and widespread flooding of lowland areas along the Columbia from Kalama downstream to Clatskanie, including flooding of some areas in and near Longview. Water levels have historically neared the tops of some levees at this stage.
17 ft
expect flooding of most islands on the Columbia River near Longview and Rainier, along with extensive flooding of unleveed farmland, mainly on the Washington side of the river.
15 ft
expect widespread flooding of unleveed farmland along the Columbia and low-lying areas in the vicinity of Longview, Kalama, and Woodland.
14 ft
expect flooding of farmland and property not protected by levees to begin in and near Longview, Kalama, and Woodland.
13.5 ft
expect minor flooding of farmland and low-lying areas not protected by levees along the Columbia.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jun 6, 1894 | 24 ft | — |
| Jun 5, 1948 | 20.3 ft | — |
| Dec 24, 1964 | 18.9 ft | — |
About This Gauge
USGS Site
NWS LID
LOPW1
River
Columbia River
County
Cowlitz, WA
Coordinates
46.1056°N, 122.9539°W
Get Flood Alerts for Columbia River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Columbia River at Longview?
The Columbia River at Longview gauge is maintained by USGS (site 14245300) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Columbia River at Longview?
The NWS-defined flood stage for Columbia River at Longview is 13.5 feet. Action stage begins at 12 feet. Moderate flooding starts at 15 feet, and major flooding at 18 feet.
How do I get alerts when Columbia River rises?
Download StormCast free on Google Play, go to River Gauges, and add Columbia River at Longview to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Columbia River at Longview gauge located?
The gauge is located in Cowlitz County, Washington at coordinates 46.1056°N, 122.9539°W. USGS site number: 14245300. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: NOAA National Ocean Service, Observations courtesy of U.S. Geological Survey