USGS Streamgage 12484500
Yakima River at Umtanum, WA
Yakima River at Umtanum, WA is USGS streamgage 12484500 in Washington, monitoring river discharge in hydrologic subbasin 17030001. It drains a watershed of about 1,594 square miles. Discharge records at this site go back to 1906. Typical flow runs near 3,371 cfs in July and 2,717.7 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Washington
- Drainage area
- 1,594 sq mi
- Gauge elevation
- 1,336 ft
- Subbasin (HUC-8)
- 17030001
- Coordinates
- 46.86263, -120.48007
- USGS site number
- 12484500
- Records begin
- 1906-11-15 (120 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 93 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 | 487.5 | 1,163.9 | 3,264.5 | |
| February | 644.2 | 1,374.1 | 3,780.3 | |
| March | 944.9 | 1,749.7 | 3,849.4 | |
| April | 1,540.3 | 2,717.7 | 5,592 | |
| May | 1,789 | 3,313.5 | 7,019.7 | |
| June | 2,086.3 | 3,199.3 | 6,270 | |
| July | 2,462.3 | 3,371 | 4,268.1 | |
| August | 2,606.1 | 3,427.1 | 4,145.5 | |
| September | 1,284 | 1,833.3 | 2,761.7 | |
| October | 603 | 1,110.9 | 1,742.9 | |
| November | 455.8 | 908.8 | 2,047 | |
| December | 530.3 | 1,019.3 | 3,590 |
All values in cubic feet per second (cfs).