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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 Nisqually River near National are issued routinely year-round.
Return to Area Map

Downstream Gauge Downstream Gauge - at McKenna
Zoom Level:16
Flood Categories (in KCFS)
Major Flood Flow: 15
Moderate Flood Flow: 10
Flood Flow: 8
Action Flow: 5.4
Low Stage (in feet): 0

Historic Crests
(1) 21,800 cfs on 11/06/2006
(2) 21,200 cfs on 02/08/1996
(3) 17,100 cfs on 12/02/1977
(4) 16,500 cfs on 11/29/1995
(5) 16,000 cfs on 11/28/1995
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 10,400 cfs on 12/01/2023 (P)
(2) 11,100 cfs on 11/05/2022 (P)
(3) 6,610 cfs on 01/13/2021 (P)
(4) 8,300 cfs on 11/23/2017 (P)
(5) 11,360 cfs on 10/22/2017 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 100 cfs on 11/17/1987
KML Image
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
15000 the Nisqually River will cause major flooding along the upper reaches of the river from Mt Rainier National Park downstream to Alder Lake. Deep and swift flood waters will inundate roads...pasture lands...and farms. The river will likely overtop some levees. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Nisqually River Basin.
10000 the Nisqually River will flood along the upper reaches of the river from Mt Rainier National Park downstream to Alder Lake. Swift waters will flood roads...pasture lands...and farms. Erosion may damage the river banks.
8000 the Nisqually River will flood roads and pasture lands along the upper reaches of the river from Mt Rainier National Park downstream to Alder Lake.
6000 the Nisqually River will locally spill over its banks along the upper reaches of the river downstream to Alder Lake.

Other Real-time and/or Archive Data Sources:
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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