USGS Streamgage 14169000
Long Tom River near Alvadore, OR
Long Tom River near Alvadore, OR is USGS streamgage 14169000 in Oregon, monitoring river discharge in hydrologic subbasin 17090003. It sits on the Long Tom River, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 252 square miles. Discharge records at this site go back to 1939. Typical flow runs near 45.3 cfs in July and 53.2 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, alongside daily high and low water-temperature forecasts.
View live conditions & forecast →
Gauge details
- State
- Oregon
- Drainage area
- 252 sq mi
- Subbasin (HUC-8)
- 17090003
- Coordinates
- 44.12261, -123.30031
- USGS site number
- 14169000
- Records begin
- 1939-10-01 (87 years)
- Rivermatics forecast
- 14-day flow outlook + water temperature
14-day flow forecast
Based on observations through for Long Tom River near Alvadore, OR. 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 |
|---|---|---|---|---|
| 68.3 | 69.1 | 70.3 | ||
| 68 | 69.3 | 71.6 | ||
| 67.7 | 69.5 | 72.9 | ||
| 66.7 | 69.3 | 73.5 | ||
| 65.8 | 69.1 | 74.8 | ||
| 64.8 | 69 | 76.4 | ||
| 63.7 | 68.9 | 78.5 | ||
| 62.9 | 68.9 | 81.5 | ||
| 61.7 | 68.9 | 84 | ||
| 60.8 | 68.8 | 86.3 | ||
| 60.3 | 68.9 | 88.6 | ||
| 59.8 | 69 | 89.9 | ||
| 59.5 | 69.1 | 90.5 | ||
| 58.6 | 69.1 | 93.8 |
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 87 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 | 171.5 | 924.5 | 3,282.6 | |
| February | 42.2 | 328.9 | 2,833.8 | |
| March | 32.8 | 77.6 | 1,656.1 | |
| April | 28.9 | 53.2 | 828.7 | |
| May | 26.7 | 69.9 | 387.8 | |
| June | 28.4 | 47.2 | 139.4 | |
| July | 25.9 | 45.3 | 63.7 | |
| August | 26.1 | 52.5 | 93.4 | |
| September | 29.2 | 53.6 | 507.4 | |
| October | 45.4 | 744.9 | 1,306.9 | |
| November | 68 | 538.4 | 1,480.5 | |
| December | 106.9 | 640.9 | 2,834.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Long Tom River near Alvadore, OR normally run highest?
- January, on the long-term record. The median daily flow that month is about 924.5 cfs, against 45.3 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Long Tom River near Alvadore, OR?
- It depends on the month. In January, half of days historically fall near 924.5 cfs, with the middle 80% of days between 171.5 and 3,282.6 cfs. The month-by-month table on this page gives the full range.
- How long has Long Tom River near Alvadore, OR been measured?
- Discharge records at USGS site 14169000 begin in 1939, about 87 years, covering roughly 9,201 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Long Tom River near Alvadore, OR?
- 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. A companion model forecasts each day's water-temperature high and low. 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 Long Tom River near Alvadore, OR?
- The gauge sits at 44.12261, -123.30031, in Oregon, in hydrologic subbasin 17090003, draining roughly 252 square miles.
- Can I use Long Tom River near Alvadore, OR 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.
Upstream and downstream on the Long Tom River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Long Tom River in full.
- Long Tom River near Noti, OR 89 sq mi
- Long Tom River near Alvadore, OR this page
- Long Tom River at Monroe, OR 391 sq mi