USGS Streamgage 11368000
McCloud River Ab Shasta Lake, CA
McCloud River Ab Shasta Lake, CA is USGS streamgage 11368000 in California, monitoring river discharge in hydrologic subbasin 18020004. It drains a watershed of about 604 square miles. Discharge records at this site go back to 1945. Typical flow runs near 359.5 cfs in July and 1,019.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 604 sq mi
- Gauge elevation
- 1,100 ft
- Subbasin (HUC-8)
- 18020004
- Coordinates
- 40.95821, -122.21973
- USGS site number
- 11368000
- Records begin
- 1945-10-01 (81 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 80 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 | 291.3 | 890.3 | 3,433.5 | |
| February | 380.5 | 1,105.6 | 4,054.8 | |
| March | 461.2 | 1,349.4 | 3,271.3 | |
| April | 398.6 | 1,019.2 | 2,924 | |
| May | 328.7 | 656.4 | 2,252.3 | |
| June | 281.5 | 446.4 | 1,522.3 | |
| July | 256.5 | 359.5 | 1,216.8 | |
| August | 238.4 | 314.3 | 1,120.6 | |
| September | 250.1 | 315.9 | 1,070.7 | |
| October | 265.5 | 324.6 | 1,073.5 | |
| November | 285.9 | 394.4 | 1,396.7 | |
| December | 284.7 | 667.2 | 2,442.9 |
All values in cubic feet per second (cfs).
Common questions
- When does McCloud River Ab Shasta Lake, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 1,349.4 cfs, against 314.3 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for McCloud River Ab Shasta Lake, CA?
- It depends on the month. In January, half of days historically fall near 890.3 cfs, with the middle 80% of days between 291.3 and 3,433.5 cfs. The month-by-month table on this page gives the full range.
- How long has McCloud River Ab Shasta Lake, CA been measured?
- Discharge records at USGS site 11368000 begin in 1945, about 81 years, covering roughly 8,456 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is McCloud River Ab Shasta Lake, CA?
- The gauge sits at 40.95821, -122.21973, in California, in hydrologic subbasin 18020004, at an elevation of about 1,100 feet, draining roughly 604 square miles.
- Can I use McCloud River Ab Shasta 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.