USGS Streamgage 11481500
Redwood C near Blue Lake, CA
Redwood C near Blue Lake, CA is USGS streamgage 11481500 in California, monitoring river discharge in hydrologic subbasin 18010102. It drains a watershed of about 68 square miles. Discharge records at this site go back to 1953. Typical flow runs near 17.3 cfs in July and 253.4 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 68 sq mi
- Gauge elevation
- 867 ft
- Subbasin (HUC-8)
- 18010102
- Coordinates
- 40.90596, -123.81534
- USGS site number
- 11481500
- Records begin
- 1953-10-01 (73 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 73 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 | 69.2 | 326.7 | 1,217.1 | |
| February | 104.2 | 335.3 | 1,194.5 | |
| March | 127.6 | 366 | 939 | |
| April | 99.8 | 253.4 | 601.8 | |
| May | 50.1 | 121.9 | 285.7 | |
| June | 22.3 | 47 | 119.5 | |
| July | 8.8 | 17.3 | 33.5 | |
| August | 3.5 | 7.1 | 12.9 | |
| September | 2.2 | 4.7 | 11 | |
| October | 2.9 | 7.6 | 68.6 | |
| November | 9.8 | 49.3 | 486.1 | |
| December | 27.4 | 203.9 | 1,102.1 |
All values in cubic feet per second (cfs).
Common questions
- When does Redwood C near Blue Lake, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 366 cfs, against 4.7 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 Redwood C near Blue Lake, CA?
- It depends on the month. In January, half of days historically fall near 326.7 cfs, with the middle 80% of days between 69.2 and 1,217.1 cfs. The month-by-month table on this page gives the full range.
- How long has Redwood C near Blue Lake, CA been measured?
- Discharge records at USGS site 11481500 begin in 1953, about 73 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Redwood C near Blue Lake, CA?
- The gauge sits at 40.90596, -123.81534, in California, in hydrologic subbasin 18010102, at an elevation of about 867 feet, draining roughly 68 square miles.
- Can I use Redwood C near Blue Lake, 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.