Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via https://www.weather.gov/owp/operations, as described in the StoryMap here.

Weather Forecast Office Seattle, WA

Northwest River Forecast Center

Hydrograph

River at a Glance

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Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

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NOTE: River forecasts for this location take into account past and future precipitation. The stages/flows that will occur may be different if future rainfall is different than forecast. Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions NOTE: Forecasts for the Cowlitz River at Packwood are issued routinely year-round.

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Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 12 Moderate Flood Stage: 11 Flood Stage: 10.5 Action Stage: 8.2 Low Stage (in feet): 0 Historic Crests (1) 14.59 ft on 11/06/2006 (2) 13.73 ft on 12/02/1977 (3) 13.54 ft on 11/23/1959 (4) 13.23 ft on 11/20/1962 (5) 13.00 ft on 12/21/1933 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 10.63 ft on 11/12/2021 (P) (2) 10.75 ft on 10/22/2017 (P) (3) 10.06 ft on 11/25/2014 (4) 8.52 ft on 03/09/2014 (5) 7.73 ft on 10/29/2012 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available.

Zoom Level:16 Legend FEMA Layer Gauge Location Disclaimer 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

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13	the Cowlitz River will cause severe near record flooding from the upper reaches of the river downstream through Packwood...with dangerous inundation of residential and commercial areas...roads...and farms throughout the flood plain. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Cowlitz River Basin.
12	the Cowlitz River will cause major flooding from the upper reaches of the river downstream through Packwood...with dangerous flooding of roads including US Highway 12...pasture lands...and farms throughout the flood plain. Flood waters will inundate some residential and commercial areas. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Cowlitz River Basin.
11	the Cowlitz River will cause flooding from the upper reaches of the river downstream through Packwood...inundating roads...pasture lands...and some farms.
10.5	the Cowlitz River will cause minor flooding from the upper reaches of the river downstream through Packwood...covering several roads along the river and nearby pasture lands.
10	the Cowlitz River will spill over its banks into nearby low pasture lands from the upper reaches downstream through Packwood.

About This Location

Latitude: 46.613056° N, Longitude: 121.678056° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 10.5 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 1048 ft 1058.5 ft Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available   Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for Packwood

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary USGS Streamflow Data USACE real time/archived data query

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Inundation Mapping Locations Snow Information Flood Smart/National Flood Insurance Program

Collaborative Agencies 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. NWS Information National Weather Service Seattle Weather Forecast Office 7600 Sandpoint Way NE Seattle, WA 98115-6349 (206) 526-6087 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:27 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities