USGS Streamgage 13210980
Mason Creek at Caldwell, ID
Mason Creek at Caldwell, ID is USGS streamgage 13210980 in Idaho, monitoring river discharge in hydrologic subbasin 17050114. It drains a watershed of about 5 square miles. Discharge records at this site go back to 2016. Typical flow runs near 133.6 cfs in July and 77.4 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
Gauge details
- State
- Idaho
- Drainage area
- 5 sq mi
- Subbasin (HUC-8)
- 17050114
- Coordinates
- 43.68322, -116.66319
- USGS site number
- 13210980
- Records begin
- 2016-11-30 (10 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Mason Creek at Caldwell, ID. 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 |
|---|---|---|---|---|
| 125 | 130 | 135 | ||
| 122 | 130 | 138 | ||
| 118 | 129 | 139 | ||
| 115 | 129 | 141 | ||
| 113 | 128 | 142 | ||
| 111 | 128 | 143 | ||
| 107 | 126 | 143 | ||
| 100 | 124 | 143 | ||
| 97.1 | 123 | 143 | ||
| 95.3 | 122 | 145 | ||
| 93 | 122 | 145 | ||
| 90.9 | 121 | 146 | ||
| 90 | 121 | 148 | ||
| 88.2 | 120 | 149 |
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 10 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 | 42.1 | 48.6 | 60.1 | |
| February | 39.6 | 46.9 | 81.6 | |
| March | 37.4 | 43.4 | 73.7 | |
| April | 42.9 | 77.4 | 109 | |
| May | 76.9 | 143.4 | 175.9 | |
| June | 105.8 | 146 | 182.4 | |
| July | 79.8 | 133.6 | 168.5 | |
| August | 96.8 | 139 | 174.3 | |
| September | 72.6 | 148.2 | 172.9 | |
| October | 48.4 | 80.5 | 104.3 | |
| November | 49 | 54.5 | 62.7 | |
| December | 45.4 | 49.4 | 59.1 |
All values in cubic feet per second (cfs).
Common questions
- When does Mason Creek at Caldwell, ID normally run highest?
- September, on the long-term record. The median daily flow that month is about 148.2 cfs, against 43.4 cfs in March, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Mason Creek at Caldwell, ID?
- It depends on the month. In January, half of days historically fall near 48.6 cfs, with the middle 80% of days between 42.1 and 60.1 cfs. The month-by-month table on this page gives the full range.
- How long has Mason Creek at Caldwell, ID been measured?
- Discharge records at USGS site 13210980 begin in 2016, about 10 years, covering roughly 3,537 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Mason Creek at Caldwell, ID?
- 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 Mason Creek at Caldwell, ID?
- The gauge sits at 43.68322, -116.66319, in Idaho, in hydrologic subbasin 17050114, draining roughly 5 square miles.
- Can I use Mason Creek at Caldwell, ID 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.