USGS Streamgage 12121600
Issaquah Creek near Mouth near Issaquah, WA
Issaquah Creek near Mouth near Issaquah, WA is USGS streamgage 12121600 in Washington, monitoring river discharge in hydrologic subbasin 17110012. It drains a watershed of about 57 square miles. Discharge records at this site go back to 1963. Typical flow runs near 35.5 cfs in July and 136.5 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 57 sq mi
- Gauge elevation
- 52 ft
- Subbasin (HUC-8)
- 17110012
- Coordinates
- 47.5523, -122.04788
- USGS site number
- 12121600
- Records begin
- 1963-10-01 (63 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 63 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 91.8 | 197.6 | 532.6 | |
| February | 91 | 172.9 | 405.3 | |
| March | 95.3 | 166.7 | 344.4 | |
| April | 79.1 | 136.5 | 251.6 | |
| May | 53 | 85.1 | 154.5 | |
| June | 35.2 | 58.5 | 143.5 | |
| July | 23 | 35.5 | 66.6 | |
| August | 17.6 | 25.7 | 45.1 | |
| September | 18.6 | 26.6 | 59 | |
| October | 24.5 | 41 | 110.2 | |
| November | 43.1 | 120.9 | 329 | |
| December | 73.4 | 179.4 | 458.5 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Cottage Lake Creek Ab Bear Creek near Redmond, WA
- Cedar River below Bear Creek near Cedar Falls, WA
- Cedar River near Cedar Falls, WA
- Rex River near Cedar Falls, WA
- Boulder Creek near Cedar Falls, WA
- Canyon Creek near Cedar Falls, WA
- Cedar River at Powerplant at Cedar Falls, WA
- Cedar River at Cedar Falls, WA