USGS Streamgage 12148500
Tolt River near Carnation, WA
Tolt River near Carnation, WA is USGS streamgage 12148500 in Washington, monitoring river discharge in hydrologic subbasin 17110010. It drains a watershed of about 81 square miles. Discharge records at this site go back to 1928. Typical flow runs near 232.5 cfs in July and 580 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 81 sq mi
- Gauge elevation
- 356 ft
- Subbasin (HUC-8)
- 17110010
- Coordinates
- 47.69566, -121.82401
- USGS site number
- 12148500
- Records begin
- 1928-09-01 (98 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 98 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 | 304.4 | 643.7 | 1,761 | |
| February | 296.8 | 554.5 | 1,375.9 | |
| March | 311 | 526.3 | 1,085.5 | |
| April | 371.6 | 580 | 1,066.1 | |
| May | 335.3 | 597.2 | 1,067.5 | |
| June | 234.5 | 442.9 | 972.9 | |
| July | 149.5 | 232.5 | 471.7 | |
| August | 104.1 | 146.1 | 265 | |
| September | 95 | 151.8 | 463.2 | |
| October | 131.4 | 293.8 | 932.2 | |
| November | 247.1 | 584.9 | 1,530.7 | |
| December | 317.3 | 648.5 | 1,579.7 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Snoqualmie River near Carnation, WA
- Snoqualmie River at Duvall, WA
- Middle Fork Snoqualmie River near Tanner, WA
- NF Snoqualmie River near Snoqualmie Falls, WA
- North Fork Snoqualmie River near North Bend, WA
- SF Snoqualmie River Ab Alice Creek near Garcia, WA
- SF Snoqualmie River at Edgewick, WA
- Boxley Creek near Cedar Falls, WA