USGS Streamgage 08390800
Rio Hondo below Diamond A Dam near Roswell, NM
Rio Hondo below Diamond A Dam near Roswell, NM is USGS streamgage 08390800 in New Mexico, monitoring river discharge in hydrologic subbasin 13060008. It drains a watershed of about 963 square miles. Discharge records at this site go back to 1963. Typical flow runs near 0 cfs in July and 0 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- New Mexico
- Drainage area
- 963 sq mi
- Gauge elevation
- 3,951 ft
- Subbasin (HUC-8)
- 13060008
- Coordinates
- 33.29987, -104.72168
- USGS site number
- 08390800
- Records begin
- 1963-10-01 (63 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 60 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 | 0 | 0 | 46 | |
| February | 0 | 0 | 46.1 | |
| March | 0 | 0 | 35 | |
| April | 0 | 0 | 53.5 | |
| May | 0 | 0 | 44.1 | |
| June | 0 | 0 | 11.1 | |
| July | 0 | 0 | 13.9 | |
| August | 0 | 0 | 73.7 | |
| September | 0 | 0 | 76.3 | |
| October | 0 | 0 | 26.8 | |
| November | 0 | 0 | 29.5 | |
| December | 0 | 0 | 34.8 |
All values in cubic feet per second (cfs).
Common questions
- When does Rio Hondo below Diamond A Dam near Roswell, NM normally run highest?
- January, on the long-term record. The median daily flow that month is about 0 cfs, against 0 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Rio Hondo below Diamond A Dam near Roswell, NM?
- It depends on the month. In January, half of days historically fall near 0 cfs, with the middle 80% of days between 0 and 46 cfs. The month-by-month table on this page gives the full range.
- How long has Rio Hondo below Diamond A Dam near Roswell, NM been measured?
- Discharge records at USGS site 08390800 begin in 1963, about 63 years, covering roughly 9,119 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Rio Hondo below Diamond A Dam near Roswell, NM?
- The gauge sits at 33.29987, -104.72168, in New Mexico, in hydrologic subbasin 13060008, at an elevation of about 3,951 feet, draining roughly 963 square miles.
- Can I use Rio Hondo below Diamond A Dam near Roswell, NM 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.