USGS Streamgage 11465240
Dry C below Lambert Br near Geyserville, CA
Dry C below Lambert Br near Geyserville, CA is USGS streamgage 11465240 in California, monitoring river discharge in hydrologic subbasin 18010110. It sits on the Dry C, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 175 square miles. Discharge records at this site go back to 2011. Typical flow runs near 101.9 cfs in July and 122.5 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
- California
- Drainage area
- 175 sq mi
- Gauge elevation
- 112 ft
- Subbasin (HUC-8)
- 18010110
- Coordinates
- 38.6532, -122.92718
- USGS site number
- 11465240
- Records begin
- 2011-11-10 (15 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Dry C below Lambert Br near Geyserville, 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 |
|---|---|---|---|---|
| 88.1 | 90.5 | 92.5 | ||
| 87.2 | 90.5 | 93.2 | ||
| 86.1 | 90.4 | 94.1 | ||
| 85.2 | 90.4 | 94.9 | ||
| 83.3 | 90 | 95 | ||
| 82.1 | 89.9 | 95.8 | ||
| 81.7 | 90.2 | 97.4 | ||
| 80 | 90 | 98.4 | ||
| 79.1 | 89.8 | 98.7 | ||
| 76.9 | 89.6 | 98.8 | ||
| 75 | 89.5 | 99.5 | ||
| 74.1 | 89.5 | 100 | ||
| 74.5 | 89.7 | 101 | ||
| 75.3 | 90.2 | 103 |
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 15 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 | 95 | 150.1 | 1,588.4 | |
| February | 90.3 | 127.4 | 2,681.3 | |
| March | 88.4 | 150.9 | 2,194.5 | |
| April | 79.3 | 122.5 | 499.3 | |
| May | 75.6 | 105.4 | 210.9 | |
| June | 79.5 | 104.8 | 176.3 | |
| July | 88.8 | 101.9 | 126.9 | |
| August | 89.3 | 102.9 | 122 | |
| September | 88.6 | 99.4 | 120.8 | |
| October | 85.3 | 99.5 | 144.6 | |
| November | 90.5 | 119.2 | 244.8 | |
| December | 93.1 | 135.5 | 743.1 |
All values in cubic feet per second (cfs).
Common questions
- When does Dry C below Lambert Br near Geyserville, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 150.9 cfs, against 99.4 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 Dry C below Lambert Br near Geyserville, CA?
- It depends on the month. In January, half of days historically fall near 150.1 cfs, with the middle 80% of days between 95 and 1,588.4 cfs. The month-by-month table on this page gives the full range.
- How long has Dry C below Lambert Br near Geyserville, CA been measured?
- Discharge records at USGS site 11465240 begin in 2011, about 15 years, covering roughly 5,032 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Dry C below Lambert Br near Geyserville, 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 Dry C below Lambert Br near Geyserville, CA?
- The gauge sits at 38.6532, -122.92718, in California, in hydrologic subbasin 18010110, at an elevation of about 112 feet, draining roughly 175 square miles.
- Can I use Dry C below Lambert Br near Geyserville, 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 Dry C
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Dry C in full.
- Dry C below Lambert Br near Geyserville, CA this page
- Dry C near Mouth near Healdsburg, CA 217 sq mi