Rivers in Washington
Issaquah Creek near Issaquah
Below flood stage
0.03ftStage
Observed Mon, Sep 28, 2:15 AM PDT
- Forecast crest
- 0.07 ftWed, Sep 30, 5:00 AM PDT
- Record crest
- 13.50 ft1990
Flood stages and impacts
- 2800.0 ftIssaquah Creek will cause severe near record flooding in Issaquah valley. Deep and swift flood waters will inundate residential and business areas and numerous roads. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Issaquah Creek Basin.
- 2300.0 ftIssaquah Creek will cause major flooding in most of the valley. Deep and swift flood waters will inundate residential and business areas and numerous roads. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Issaquah Creek Basin.
- 2000.0 ftIssaquah Creek will flood most low areas in the valley. Swift waters will flood residential and business areas and roads including Newport Way.
- 1200.0 ftIssaquah Creek will spill over its banks into low flood prone areas of the valley.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | 6% |
| Moderate flooding | Under 5% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 27, 2026.
Crest history
77 crests on NOAA’s list since 1964.
| # | Date | Stage |
|---|---|---|
| 1 | January 9, 1990 | 13.50 ft |
| 2 | November 24, 1990 | 13.43 ft |
| 3 | November 24, 1986 | 13.20 ft |
| 4 | February 8, 1996 | 12.84 ft |
| 5 | January 8, 2009 | 12.56 ft |
| 6 | February 6, 2020 | 12.33 ft |
| 7 | November 29, 1995 | 12.11 ft |
| 8 | January 25, 1984 | 11.79 ft |
| 9 | December 11, 2025 | 11.74 ft |
| 10 | January 19, 1986 | 11.52 ft |
| 11 | November 6, 2006 | 11.50 ft |
| 12 | November 14, 2001 | 11.50 ft |
| 13 | April 5, 1991 | 11.48 ft |
| 14 | December 3, 1975 | 11.46 ft |
| 15 | December 9, 2015 | 11.41 ft |
| 16 | November 26, 1998 | 11.18 ft |
| 17 | January 5, 1983 | 11.18 ft |
| 18 | January 1, 1997 | 11.16 ft |
| 19 | December 3, 2007 | 11.15 ft |
| 20 | December 4, 1989 | 11.11 ft |
| 21 | February 19, 1995 | 10.80 ft |
| 22 | December 15, 1979 | 10.70 ft |
| 23 | December 20, 2019 | 10.65 ft |
| 24 | December 12, 2010 | 10.64 ft |
| 25 | January 24, 1982 | 10.64 ft |
Most recent crests
- December 11, 2025: 11.74 ft
- January 13, 2021: 9.07 ft
- January 3, 2021: 8.97 ft
- February 6, 2020: 12.33 ft
- February 1, 2020: 8.89 ft
- December 20, 2019: 10.65 ft
- February 9, 2017: 9.71 ft
- December 9, 2015: 11.41 ft
- November 14, 2015: 9.91 ft
- January 5, 2015: 7.70 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Northwest River Forecast Center. Forecasts are issued routinely year-round. 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.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.