USGS Streamgage 14170000
Long Tom River at Monroe, OR
Long Tom River at Monroe, OR is USGS streamgage 14170000 in Oregon, monitoring river discharge in hydrologic subbasin 17090003. It drains a watershed of about 391 square miles. Discharge records at this site go back to 1920. Typical flow runs near 42.2 cfs in July and 263.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Oregon
- Drainage area
- 391 sq mi
- Subbasin (HUC-8)
- 17090003
- Coordinates
- 44.31283, -123.29636
- USGS site number
- 14170000
- Records begin
- 1920-11-13 (106 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 105 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 | 341.5 | 1,539.7 | 4,529.7 | |
| February | 188.9 | 936.3 | 4,101.4 | |
| March | 171.8 | 480.5 | 2,548.7 | |
| April | 119.9 | 263.3 | 1,344.9 | |
| May | 71.3 | 164.5 | 513.1 | |
| June | 42.1 | 74.1 | 192.5 | |
| July | 26.8 | 42.2 | 64.3 | |
| August | 19.8 | 37.9 | 76 | |
| September | 17.8 | 46.9 | 443.2 | |
| October | 23.6 | 664 | 1,276.7 | |
| November | 59.9 | 571.7 | 2,048.7 | |
| December | 160.1 | 971.8 | 3,993.9 |
All values in cubic feet per second (cfs).