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This probabilistic forecast is issued by the Northwest River Forecast Center.
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About this graph
Forecasts for the Chehalis River near Grand Mound are issued routinely year-round.
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Upstream Locations Upstream Gauge
Zoom Level:13
Flood Categories (in feet)
Major Flood Stage: 17
Moderate Flood Stage: 15.5
Flood Stage: 14
Action Stage: 0
Low Stage (in feet): -9999

Historic Crests
(1) 20.23 ft on 12/04/2007
(2) 19.98 ft on 02/09/1996
(3) 19.34 ft on 01/10/1990
(4) 18.41 ft on 11/25/1986
(5) 18.39 ft on 12/29/1937
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 15.77 ft on 02/10/2017 (P)
(2) 14.47 ft on 11/26/2016 (P)
(3) 16.84 ft on 12/10/2015 (P)
(4) 15.62 ft on 11/19/2015 (P)
(5) 14.49 ft on 11/15/2015 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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Gauge LocationGauge Map Marker
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 Collapse
If you notice any errors in the below information, please contact our Webmaster
19 the Chehalis River in Thurston County will cause severe near record flooding...with deep and swift flood waters inundating the Independence Valley. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Chehalis River Basin.
17.5 the Chehalis River in Thurston County will cause major flooding...inundating roads and farm lands in Independence Valley. Deep and swift flood waters will cover SR-12 and James...Independence and Moon Roads. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Chehalis River Basin.
15.5 the Chehalis River in Thurston County will flood several roads in Independence Valley with swiftly moving water including SR-12 and James...Independence...Moon and Anderson Roads. Flood waters will cut off access to and from Chehalis Reservation and inundate nearby farm lands. Some residential structures may be threatened.
14 the Chehalis River in Thurston County will flood several roads in Independence Valley including James Road...Independence Road and Moon road. Flood waters will also cover nearby farm lands.
12.5 the Chehalis River in Thurston County will locally spill out of its banks into nearby fields and over a few roads.

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Chehalis River Basin Flood Authority's Early Warning System:http://lewiscountywa.gov/chehalis-river-basin-flood-authority
Collaborative Agencies Collapse
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
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Page last modified: 21-Dec-2016 5:18 PM
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