USGS Streamgage 12148300
SF Tolt River below Regulating Basin near Carnation, WA
SF Tolt River below Regulating Basin near Carnation, WA is USGS streamgage 12148300 in Washington, monitoring river discharge in hydrologic subbasin 17110010. It drains a watershed of about 30 square miles. Discharge records at this site go back to 1982. Typical flow runs near 75.2 cfs in July and 109.9 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 30 sq mi
- Gauge elevation
- 655 ft
- Subbasin (HUC-8)
- 17110010
- Coordinates
- 47.69677, -121.78734
- USGS site number
- 12148300
- Records begin
- 1982-03-01 (44 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 44 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 | 80.4 | 155.2 | 647.4 | |
| February | 79.4 | 117.4 | 486.1 | |
| March | 81.5 | 113.5 | 387.9 | |
| April | 84.7 | 109.9 | 355.6 | |
| May | 77.8 | 114.9 | 305.5 | |
| June | 69.4 | 90.4 | 262.6 | |
| July | 59.9 | 75.2 | 101.5 | |
| August | 51.2 | 71.4 | 84.7 | |
| September | 59 | 70.6 | 86.9 | |
| October | 65.2 | 77.7 | 122.1 | |
| November | 73 | 114.2 | 388.6 | |
| December | 78.1 | 123.8 | 440.2 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Tolt River near Carnation, WA
- 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