USGS Streamgage 14301000
Nehalem River near Foss, OR
Nehalem River near Foss, OR is USGS streamgage 14301000 in Oregon, monitoring river discharge in hydrologic subbasin 17100202. It sits on the Nehalem River, alongside 3 other gauges Rivermatics tracks on the same river. It drains a watershed of about 667 square miles. Discharge records at this site go back to 1939. Typical flow runs near 238.1 cfs in July and 2,119.7 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
- 667 sq mi
- Subbasin (HUC-8)
- 17100202
- Coordinates
- 45.704, -123.7554
- USGS site number
- 14301000
- Records begin
- 1939-10-01 (87 years)
- Rivermatics forecast
- 14-day flow outlook + water temperature
14-day flow forecast
Based on observations through for Nehalem River near Foss, 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 |
|---|---|---|---|---|
| 98 | 103 | 108 | ||
| 98.1 | 107 | 121 | ||
| 98 | 111 | 139 | ||
| 96 | 110 | 138 | ||
| 93.2 | 107 | 135 | ||
| 90.2 | 104 | 131 | ||
| 87.2 | 101 | 126 | ||
| 85.4 | 99.7 | 125 | ||
| 83.8 | 98.4 | 124 | ||
| 82.4 | 97.4 | 125 | ||
| 80.3 | 95.9 | 125 | ||
| 77.8 | 93.4 | 119 | ||
| 75.6 | 91.3 | 115 | ||
| 74.2 | 90.3 | 114 |
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 85 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 | 1,461.9 | 4,571.9 | 13,848.4 | |
| February | 1,412.8 | 3,784.8 | 11,531.7 | |
| March | 1,359.7 | 3,323.9 | 8,448.1 | |
| April | 1,117.4 | 2,119.7 | 5,287.3 | |
| May | 568.4 | 1,011.6 | 2,430 | |
| June | 297.4 | 510.3 | 1,117.8 | |
| July | 146.4 | 238.1 | 413.2 | |
| August | 80.2 | 132.2 | 211.8 | |
| September | 75.2 | 119.3 | 404.6 | |
| October | 100.6 | 359.8 | 2,048.3 | |
| November | 472 | 2,533.8 | 9,097.3 | |
| December | 1,339.7 | 4,379 | 13,625.8 |
All values in cubic feet per second (cfs).
Common questions
- When does Nehalem River near Foss, OR normally run highest?
- January, on the long-term record. The median daily flow that month is about 4,571.9 cfs, against 119.3 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Nehalem River near Foss, OR?
- It depends on the month. In January, half of days historically fall near 4,571.9 cfs, with the middle 80% of days between 1,461.9 and 13,848.4 cfs. The month-by-month table on this page gives the full range.
- How long has Nehalem River near Foss, OR been measured?
- Discharge records at USGS site 14301000 begin in 1939, about 87 years, covering roughly 9,199 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Nehalem River near Foss, 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 Nehalem River near Foss, OR?
- The gauge sits at 45.704, -123.7554, in Oregon, in hydrologic subbasin 17100202, draining roughly 667 square miles.
- Can I use Nehalem River near Foss, 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 Nehalem River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Nehalem River in full.
- Nehalem River near Vernonia, OR 70 sq mi
- Nehalem River at Jewell, OR 412 sq mi
- Nehalem River near Foss, OR this page
- Nehalem River at Nehalem, OR 838 sq mi