USGS Streamgage 09527660
Brock Reservoir Outlet near Calexico, CA
Brock Reservoir Outlet near Calexico, CA is USGS streamgage 09527660 in California, monitoring river discharge in hydrologic subbasin 18100204. Discharge records at this site go back to 2013. Typical flow runs near 55.4 cfs in July and 91.4 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
- Gauge elevation
- 98 ft
- Subbasin (HUC-8)
- 18100204
- Coordinates
- 32.70575, -115.03433
- USGS site number
- 09527660
- Records begin
- 2013-10-22 (13 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Brock Reservoir Outlet near Calexico, 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 |
|---|---|---|---|---|
| 0.2 | 1.1 | 57.9 | ||
| 0 | 12.7 | 455 | ||
| 0 | 46.7 | 652 | ||
| 0 | 2.3 | 408 | ||
| 0 | 7.8 | 366 | ||
| 0 | 1.5 | 251 | ||
| 0 | 1.1 | 358 | ||
| 0 | 4.1 | 385 | ||
| 0 | 0.5 | 312 | ||
| 0 | 0.9 | 345 | ||
| 0 | 0.4 | 263 | ||
| 0 | 0.4 | 179 | ||
| 0 | 0.4 | 296 | ||
| 0 | 0.6 | 347 |
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 13 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 | -3.8 | 68.8 | 661 | |
| February | -4.5 | 69.5 | 713.3 | |
| March | -6.3 | 56.5 | 657.6 | |
| April | -6.5 | 91.4 | 722.1 | |
| May | -7.7 | 71.1 | 671.1 | |
| June | -7.9 | 55.8 | 633 | |
| July | -5 | 55.4 | 601.1 | |
| August | -5.6 | 83.6 | 704.3 | |
| September | -8.1 | 51.8 | 694 | |
| October | -5.4 | 56.9 | 602.4 | |
| November | -2.6 | 83.4 | 628.9 | |
| December | -2.6 | 88.3 | 638.8 |
All values in cubic feet per second (cfs).
Common questions
- When does Brock Reservoir Outlet near Calexico, CA normally run highest?
- April, on the long-term record. The median daily flow that month is about 91.4 cfs, against 51.8 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 Brock Reservoir Outlet near Calexico, CA?
- It depends on the month. In January, half of days historically fall near 68.8 cfs, with the middle 80% of days between -3.8 and 661 cfs. The month-by-month table on this page gives the full range.
- How long has Brock Reservoir Outlet near Calexico, CA been measured?
- Discharge records at USGS site 09527660 begin in 2013, about 13 years, covering roughly 4,670 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Brock Reservoir Outlet near Calexico, 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 Brock Reservoir Outlet near Calexico, CA?
- The gauge sits at 32.70575, -115.03433, in California, in hydrologic subbasin 18100204, at an elevation of about 98 feet.
- Can I use Brock Reservoir Outlet near Calexico, 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.