USGS Streamgage 11377100
Sacramento River Ab Bend Bridge near Red Bluff, CA
Sacramento River Ab Bend Bridge near Red Bluff, CA is USGS streamgage 11377100 in California, monitoring river discharge in hydrologic subbasin 18020155. It sits on the Sacramento River, alongside 3 other gauges Rivermatics tracks on the same river. It drains a watershed of about 8,900 square miles. Discharge records at this site go back to 1879. Typical flow runs near 13,138.7 cfs in July and 9,128.3 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
- California
- Drainage area
- 8,900 sq mi
- Gauge elevation
- 288 ft
- Subbasin (HUC-8)
- 18020155
- Coordinates
- 40.28846, -122.18663
- USGS site number
- 11377100
- Records begin
- 1879-03-06 (147 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Sacramento River Ab Bend Bridge near Red Bluff, CA. 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 |
|---|---|---|---|---|
| 6,121 | 6,507 | 6,741 | ||
| 5,926 | 6,415 | 6,739 | ||
| 5,779 | 6,355 | 6,751 | ||
| 5,687 | 6,316 | 6,783 | ||
| 5,607 | 6,287 | 6,825 | ||
| 5,526 | 6,261 | 6,864 | ||
| 5,447 | 6,231 | 6,896 | ||
| 5,378 | 6,202 | 6,940 | ||
| 5,315 | 6,176 | 6,983 | ||
| 5,270 | 6,158 | 6,981 | ||
| 5,172 | 6,122 | 6,942 | ||
| 5,130 | 6,090 | 6,934 | ||
| 5,102 | 6,062 | 6,979 | ||
| 5,071 | 6,043 | 7,020 |
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 63 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 | 4,814.2 | 8,635.5 | 41,541.9 | |
| February | 4,846.2 | 9,575.2 | 52,637.9 | |
| March | 5,216.8 | 9,316.1 | 40,800 | |
| April | 5,896.7 | 9,128.3 | 22,116.7 | |
| May | 8,054.5 | 10,709.7 | 17,558.1 | |
| June | 9,087.7 | 11,923.3 | 15,566.7 | |
| July | 10,050.3 | 13,138.7 | 15,371 | |
| August | 8,758.4 | 11,301.9 | 13,858.1 | |
| September | 6,205.7 | 8,362.3 | 10,610 | |
| October | 4,768.1 | 7,124.2 | 8,787.4 | |
| November | 4,635.7 | 6,676.3 | 13,219 | |
| December | 4,420.3 | 7,740 | 27,061.3 |
All values in cubic feet per second (cfs).
Common questions
- When does Sacramento River Ab Bend Bridge near Red Bluff, CA normally run highest?
- July, on the long-term record. The median daily flow that month is about 13,138.7 cfs, against 6,676.3 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Sacramento River Ab Bend Bridge near Red Bluff, CA?
- It depends on the month. In January, half of days historically fall near 8,635.5 cfs, with the middle 80% of days between 4,814.2 and 41,541.9 cfs. The month-by-month table on this page gives the full range.
- How long has Sacramento River Ab Bend Bridge near Red Bluff, CA been measured?
- Discharge records at USGS site 11377100 begin in 1879, about 147 years, covering roughly 9,130 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Sacramento River Ab Bend Bridge near Red Bluff, CA?
- 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 Sacramento River Ab Bend Bridge near Red Bluff, CA?
- The gauge sits at 40.28846, -122.18663, in California, in hydrologic subbasin 18020155, at an elevation of about 288 feet, draining roughly 8,900 square miles.
- Can I use Sacramento River Ab Bend Bridge near Red Bluff, CA 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 Sacramento River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Sacramento River in full.
- Sacramento River Ab Bend Bridge near Red Bluff, CA this page
- Sacramento River below Wilkins Slough near Grimes, CA 12,915 sq mi
- Sacramento River Ab Delta Cross Channel, CA
- Sacramento River below Walnut Grove Br A Walnut Grove, CA