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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 Snoqualmie River at Snoqualmie Falls are issued routinely year-round.
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Upstream Locations Upstream Gauge Downstream Gauge Downstream Gauge - near Carnation
Zoom Level:16
Flood Categories (in KCFS)
Major Flood Flow: 41
Moderate Flood Flow: 31
Flood Flow: 20
Action Flow: 15
Low Stage (in feet): -9999

Historic Crests
(1) 78,800 cfs on 11/24/1990
(2) 61,000 cfs on 11/23/1959
(3) 60,700 cfs on 01/07/2009
(4) 58,100 cfs on 11/24/1986
(5) 54,900 cfs on 11/07/2006 (P)
(6) 53,800 cfs on 12/02/1977
(7) 51,800 cfs on 12/03/1975
(8) 51,700 cfs on 02/09/1996
(9) 50,200 cfs on 11/29/1995 (P)
(10) 50,100 cfs on 01/05/2015
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 23,600 cfs on 12/06/2023 (P)
(2) 36,700 cfs on 11/05/2022 (P)
(3) 25,800 cfs on 01/12/2022 (P)
(4) 22,000 cfs on 01/13/2021 (P)
(5) 37,500 cfs on 02/01/2020 (P)
(6) 19,700 cfs on 12/30/2018 (P)
(7) 28,100 cfs on 11/23/2017 (P)
(8) 23,580 cfs on 11/22/2017 (P)
(9) 33,880 cfs on 10/22/2017 (P)
(10) 21,900 cfs on 10/20/2016 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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
70000 the Snoqualmie River will cause severe near record flooding from the town of Snoqualmie downstream through Fall City. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snoqualmie River Basin. This river level on the Snoqualmie corresponds to a phase 4 flood in the King County flood system.
55000 the Snoqualmie River will cause major flooding from the town of Snoqualmie downstream through Fall City...inundating most of the farm land in the flood plain...some residential areas...and many roads. Flood waters will be deep and swift in some areas. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snoqualmie River Basin. This river level on the Snoqualmie corresponds roughly to a phase 4 flood in the King County flood system.
41000 the Snoqualmie River will cause major flooding from the town of Snoqualmie downstream through Fall City...inundating most of the farm land in the flood plain...some residential areas...and many roads. Flood waters will be deep and swift in some areas. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snoqualmie River Basin. This river level on the Snoqualmie corresponds roughly to a phase 4 flood in the King County flood system.
30000 the Snoqualmie River will cause widespread flooding of pasture lands and roads along the river from the town of Snoqualmie downstream through Fall City. Roads that may become flooded include Fall City-Carnation...Tolt Hill...and Novelty Flats Roads. This river level on the Snoqualmie corresponds roughly to a phase 3 flood in the King County flood system.
20000 the Snoqualmie River will cause widespread flooding of pasture lands and roads along the river from the town of Snoqualmie downstream through Fall City. Roads that may become flooded include Fall City-Carnation...Tolt Hill...and Novelty Flats Roads. This river level on the Snoqualmie corresponds roughly to a phase 3 flood in the King County flood system.
12000 the Snoqualmie River will spill over its banks between the town of Snoqualmie and Fall City...covering pasture lands and several roads along the river. This river level on the Snoqualmie corresponds roughly to a phase 2 flood in the King County flood system.

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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