USGS Streamgage 12506000
Toppenish Creek near Fort Simcoe, WA
Toppenish Creek near Fort Simcoe, WA is USGS streamgage 12506000 in Washington, monitoring river discharge in hydrologic subbasin 17030003. It drains a watershed of about 122 square miles. Discharge records at this site go back to 1909. Typical flow runs near 20.2 cfs in July and 237.2 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
Gauge details
- State
- Washington
- Drainage area
- 122 sq mi
- Gauge elevation
- 1,311 ft
- Subbasin (HUC-8)
- 17030003
- Coordinates
- 46.31096, -120.78812
- USGS site number
- 12506000
- Records begin
- 1909-03-01 (117 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Toppenish Creek near Fort Simcoe, WA. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 11 | 11.9 | 13 | ||
| 10.2 | 11.5 | 13.1 | ||
| 11.4 | 14.3 | 19.4 | ||
| 11.3 | 14.3 | 19.2 | ||
| 10.6 | 13.1 | 16.9 | ||
| 10 | 12.4 | 16 | ||
| 9.5 | 11.8 | 15.1 | ||
| 9.2 | 11.6 | 14.9 | ||
| 8.7 | 11.1 | 14.2 | ||
| 8.3 | 10.7 | 13.8 | ||
| 8 | 10.5 | 13.5 | ||
| 7.9 | 10.3 | 13.2 | ||
| 7.7 | 10.1 | 13.1 | ||
| 7.7 | 10.2 | 13.3 |
All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 118 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 | 26.2 | 61.4 | 215.5 | |
| February | 34.3 | 83.7 | 256.7 | |
| March | 51 | 146.9 | 504.2 | |
| April | 109.6 | 237.2 | 481.6 | |
| May | 64.8 | 137.9 | 364.6 | |
| June | 22 | 41.7 | 99 | |
| July | 8.5 | 20.2 | 36.8 | |
| August | 7.2 | 13.8 | 22.8 | |
| September | 8.5 | 14.1 | 21.7 | |
| October | 13.7 | 19.7 | 36.5 | |
| November | 19.1 | 27 | 66.4 | |
| December | 22.1 | 38.5 | 155.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Toppenish Creek near Fort Simcoe, WA normally run highest?
- April, on the long-term record. The median daily flow that month is about 237.2 cfs, against 13.8 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Toppenish Creek near Fort Simcoe, WA?
- It depends on the month. In January, half of days historically fall near 61.4 cfs, with the middle 80% of days between 26.2 and 215.5 cfs. The month-by-month table on this page gives the full range.
- How long has Toppenish Creek near Fort Simcoe, WA been measured?
- Discharge records at USGS site 12506000 begin in 1909, about 117 years, covering roughly 5,788 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Toppenish Creek near Fort Simcoe, WA?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
- Where is Toppenish Creek near Fort Simcoe, WA?
- The gauge sits at 46.31096, -120.78812, in Washington, in hydrologic subbasin 17030003, at an elevation of about 1,311 feet, draining roughly 122 square miles.
- Can I use Toppenish Creek near Fort Simcoe, WA data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.