USGS Streamgage 10254970
New River at International Boundary at Calexico, CA
New River at International Boundary at Calexico, CA is USGS streamgage 10254970 in California, monitoring river discharge in hydrologic subbasin 18100204. Discharge records at this site go back to 1973. Typical flow runs near 136.1 cfs in July and 199 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Gauge elevation
- -48 ft
- Subbasin (HUC-8)
- 18100204
- Coordinates
- 32.66547, -115.50183
- USGS site number
- 10254970
- Records begin
- 1973-09-30 (53 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 47 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 | 77.7 | 172.8 | 324.1 | |
| February | 82.6 | 189.2 | 332.6 | |
| March | 102.7 | 201 | 347.2 | |
| April | 105.7 | 199 | 370.6 | |
| May | 81.1 | 174.3 | 317.9 | |
| June | 71.5 | 150 | 276.5 | |
| July | 65.3 | 136.1 | 303.9 | |
| August | 59 | 141.6 | 350.6 | |
| September | 59.6 | 143.4 | 331.8 | |
| October | 59.4 | 134.4 | 307.1 | |
| November | 62.6 | 133.4 | 289.3 | |
| December | 71.8 | 159.2 | 325.7 |
All values in cubic feet per second (cfs).
Common questions
- When does New River at International Boundary at Calexico, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 201 cfs, against 133.4 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for New River at International Boundary at Calexico, CA?
- It depends on the month. In January, half of days historically fall near 172.8 cfs, with the middle 80% of days between 77.7 and 324.1 cfs. The month-by-month table on this page gives the full range.
- How long has New River at International Boundary at Calexico, CA been measured?
- Discharge records at USGS site 10254970 begin in 1973, about 53 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 New River at International Boundary at Calexico, CA?
- The gauge sits at 32.66547, -115.50183, in California, in hydrologic subbasin 18100204, at an elevation of about -48 feet.
- Can I use New River at International Boundary at 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.