USGS Streamgage 14211315
Tryon Creek near Lake Oswego, OR
Tryon Creek near Lake Oswego, OR is USGS streamgage 14211315 in Oregon, monitoring river discharge in hydrologic subbasin 17090012. It drains a watershed of about 6 square miles. Discharge records at this site go back to 2001. Typical flow runs near 1.1 cfs in July and 7.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Oregon
- Drainage area
- 6 sq mi
- Subbasin (HUC-8)
- 17090012
- Coordinates
- 45.43067, -122.67371
- USGS site number
- 14211315
- Records begin
- 2001-08-01 (25 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 24 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 | 4.4 | 12.1 | 53.9 | |
| February | 3.2 | 8.5 | 39.9 | |
| March | 3.4 | 9.6 | 38.2 | |
| April | 2.6 | 7.2 | 23.1 | |
| May | 1.5 | 3.4 | 13.9 | |
| June | 1 | 1.9 | 8.7 | |
| July | 0.6 | 1.1 | 2 | |
| August | 0.4 | 0.8 | 1.7 | |
| September | 0.3 | 0.8 | 5 | |
| October | 0.6 | 1.6 | 12.4 | |
| November | 1.6 | 5.9 | 32 | |
| December | 2.4 | 10.3 | 55.8 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Johnson Creek at Regner Road, at Gresham, OR
- Kelley Creek at Se 159Th Drive at Portland, OR
- Johnson Creek at Sycamore, OR
- Crystal Springs Creek at Bybee St, Portland, OR
- Johnson Creek at Milwaukie, OR
- Willamette River at Portland, OR
- Fairview Creek at Glisan St near Gresham, OR
- Columbia Slough at Portland, OR