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 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.
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)
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 5,027 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- 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.