USGS Streamgage 11465350
Dry C near Mouth near Healdsburg, CA
Dry C near Mouth near Healdsburg, CA is USGS streamgage 11465350 in California, monitoring river discharge in hydrologic subbasin 18010110. It drains a watershed of about 217 square miles. Discharge records at this site go back to 1981. Typical flow runs near 94.6 cfs in July and 125.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 217 sq mi
- Gauge elevation
- 57 ft
- Subbasin (HUC-8)
- 18010110
- Coordinates
- 38.58737, -122.86218
- USGS site number
- 11465350
- Records begin
- 1981-10-01 (45 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 45 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 | 83.2 | 136.4 | 1,608.7 | |
| February | 85.1 | 140.4 | 2,683.9 | |
| March | 89.2 | 161.5 | 2,024.2 | |
| April | 68.4 | 125.2 | 522.1 | |
| May | 43.7 | 98.5 | 176.9 | |
| June | 60.3 | 99.7 | 146.7 | |
| July | 35 | 94.6 | 128.4 | |
| August | 52.4 | 93.4 | 124.2 | |
| September | 32.4 | 90.3 | 115.5 | |
| October | 22.9 | 90.1 | 112.2 | |
| November | 79.5 | 115 | 148 | |
| December | 86.6 | 130.9 | 496.7 |
All values in cubic feet per second (cfs).
Common questions
- When does Dry C near Mouth near Healdsburg, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 161.5 cfs, against 90.1 cfs in October, 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 near Mouth near Healdsburg, CA?
- It depends on the month. In January, half of days historically fall near 136.4 cfs, with the middle 80% of days between 83.2 and 1,608.7 cfs. The month-by-month table on this page gives the full range.
- How long has Dry C near Mouth near Healdsburg, CA been measured?
- Discharge records at USGS site 11465350 begin in 1981, about 45 years, covering roughly 7,598 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Dry C near Mouth near Healdsburg, CA?
- The gauge sits at 38.58737, -122.86218, in California, in hydrologic subbasin 18010110, at an elevation of about 57 feet, draining roughly 217 square miles.
- Can I use Dry C near Mouth near Healdsburg, 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.