Search by city or zip code. Press enter or select the go button to submit request
Local weather forecast by
What is AHPS?
Weather Forecast Office Portland, OR
Northwest River Forecast Center
River at a Glance
Auto Refresh is OFF
About this graph
Tabular Data (UTC)
Tabular Data (PDT)
Forecasts for the Cowlitz River at Kelso are issued routinely year-round.
Scale to Flood Categories
Return to Area Map
Flood Categories (in feet)
Major Flood Stage:
Moderate Flood Stage:
(1) 29.50 ft on 02/09/1996
(2) 28.86 ft on 12/23/1933
(3) 27.00 ft on 11/30/1995
(4) 24.30 ft on 06/10/1948
(5) 24.20 ft on 01/08/2009
Show More Historical Crests
: Preliminary values subject to further review.
Low Water Records
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos
If you notice any errors in the below information, please contact our
Above 28.5 ft, Major flooding in Kelso occurs, including residential and business areas. Numerous roads are flooded and closed, and levees may be subject to erosion and overtopping at this level.
Above 26.5 ft, Some flooding of business and residential areas occurs in Kelso. Numerous road closures can be expected. The top of some levees are approached at this level.
Above 24.5 ft, Flooding of a few residential areas in Kelso begins. Also expect widespread flooding of pasture land and low lying roads.
Above 21.5 ft, Flooding of several low lying and secondary roads begins, including the Cowlitz Gardens neighborhood, along with flooding of pasture and lowland upstream of Kelso.
At 19.5 ft, The river is at bankfull level.
About This Location
Latitude: 46.142500° N, Longitude: 122.916111° W, Horizontal Datum: NAD83/WGS84
Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
Older USGS topographic maps, NGVD29 benchmarks
Older USGS topographic maps, MSL benchmarks
Vertical datum: Mean Sea Level, NAVD88
Archived/Historical Data at USACE DataQuery
10-day Forecast/Trend, Northwest River Forecast Center
River Forecast Centers
River Stage Summary
Text Table Temp & Precip Forecasts
3-Day Detailed Precip Forecast
10-Day Temp & Precip Outlook
Lewis River Reservoir Data - updated hourly
Lower Columbia Reservoir and River conditions
COE real-time and archived data
USGS WaterWatch Oregon
USGS WaterWatch Washington
USGS River Temperatures & Water Quality Oregon
USGS River Temperatures & Water Quality Washington
Oregon Water Resources Dept - Surface Water Data
NWS Precipitation and River Forecasting
AHPS Iframes for Developers
Mobile iNWS for emergency management
AHPS Web Brochure
NRCS SNOTEL data map interface
Willamette Valley Reservoirs
USBR PacNW Reservoirs
Oregon Drought Information
Nationa Drought Information
USGS Oregon Water Science Center
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
National Weather Service
Portland Weather Forecast Office
5241 NE 122nd Avenue
Portland, OR 97230-1089
Page last modified: 27-Aug-2014 7:09 PM