Rio Hondo (Upper Pecos)
Streamflow, conditions and background by watershed segment. Data through November 1, 2026.
Data gaps and disparities
Found automatically in the gauge records behind this river, and notes from a reviewer who checked them against other sources. Gauges need at least 26 weeks of daily data to appear on the Flow tab.
Reviewed
- Rio Hondo Near Roswell, NM verified
Reviewed 2026-09-27On May 24, 2014 USGS publishes an estimated daily mean of 3,340 cfs (flag "e") but an annual instantaneous peak of 2,580 cfs for the same day. A daily mean cannot exceed the day's peak, so one of the two USGS values is wrong; that week's mean is inflated if the daily value is the error.
Warnings (0)
No warnings.
Context (9)
Show 9 notes
- ended Discontinued gauges: 3 gauges have stopped reporting: Rio Hondo At Picacho, NM (last 1962); Rio Hondo At Roswell, NM (last 1997); Rio Hondo Above Chavez Canyon Near Hondo, NM (last 2017). Their segments rest on fewer gauges after those years.
- copy disagree Rio Hondo At Diamond A Ranch Nr Roswell, NM: The usace_cwms copy agrees on the median but differs by more than 10% on 42% of 1,706 shared days (often provisional vs approved data, or a different daily averaging window). The report does not use usace_cwms for this gauge.
- spike Rio Hondo At Diamond A Ranch Nr Roswell, NM: 1 single-day flow far above the gauge's usual range (99th percentile 277 cfs) with no annual peak on record to confirm them: 3,030 cfs on Sep 25, 2026. Flash floods are common here, but these are unverified.
- zero run Rio Hondo At Diamond A Ranch Nr Roswell, NM: 99 runs of 60+ days at zero flow; longest 360 days from Sep 2, 2016; 345 days from Jul 30, 1973. Usually real (a dry channel or no release), not missing data.
- zero run Rio Hondo At Roswell, NM: 17 runs of 60+ days at zero flow; longest 316 days from Sep 20, 1981; 246 days from Sep 15, 1996. Usually real (a dry channel or no release), not missing data.
- copy disagree Rio Hondo Blw Diamond A Dam Nr Roswell, NM: The usace_cwms copy agrees on the median but differs by more than 10% on 30% of 1,111 shared days (often provisional vs approved data, or a different daily averaging window). The report takes 49 days from usace_cwms where usgs is missing, so the level can shift there.
- zero run Rio Hondo Blw Diamond A Dam Nr Roswell, NM: 74 runs of 60+ days at zero flow; longest 408 days from May 2, 2001; 372 days from Aug 7, 1976. Usually real (a dry channel or no release), not missing data.
- copy disagree Rio Hondo Near Roswell, NM: The usace_cwms copy agrees on the median but differs by more than 10% on 51% of 726 shared days (often provisional vs approved data, or a different daily averaging window). The report takes 2 days from usace_cwms where usgs is missing, so the level can shift there.
- spike Rio Hondo Near Roswell, NM: 1 single-day flow far above the gauge's usual range (99th percentile 87 cfs) with no annual peak on record to confirm them: 516 cfs on May 1, 1999. Flash floods are common here, but these are unverified.
Values removed (5)
A reading is removed automatically only when it is impossible (for example, a daily mean above the highest flow USGS recorded that water year). Low and zero flows are never removed: rivers here really do dry up.
Show 5 removed values
| Gauge | Date | Source | cfs | Why |
|---|---|---|---|---|
| Rio Hondo At Diamond A Ranch Nr Roswell, NM | 2008-10-08 | usace_cwms | 29.2 | automatic: daily mean above that water year's USGS peak of 19 cfs |
| Rio Hondo At Diamond A Ranch Nr Roswell, NM | 2015-12-27 | usace_cwms | 514.6 | automatic: daily mean above that water year's USGS peak of 438 cfs |
| Rio Hondo At Diamond A Ranch Nr Roswell, NM | 2018-10-26 | usace_cwms | 90.2 | automatic: daily mean above that water year's USGS peak of 85 cfs |
| Rio Hondo Near Roswell, NM | 2014-05-24 | usbr_hydrodata | 3340 | automatic: daily mean above that water year's USGS peak of 2,580 cfs |
| Rio Hondo Near Roswell, NM | 2014-05-24 | usgs | 3340 | automatic: daily mean above that water year's USGS peak of 2,580 cfs (USGS flags the daily value as estimated) |
Gauges
Each row is one physical gauge; "published by" lists every agency copy that was merged into it.
| Gauge | Segment | Published by | First | Last | Weeks |
|---|---|---|---|---|---|
| Rio Hondo Above Chavez Canyon Near Hondo, NM | Rio Hondo | usgs | 2008-08-18 | 2017-08-14 | 470 |
| Rio Hondo At Picacho, NM | Rio Hondo | usgs | 1956-12-03 | 1962-06-25 | 291 |
| Rio Hondo Near Roswell, NM | Rio Hondo | usace_cwms, usbr_hydrodata, usgs | 1997-06-02 | 2026-10-26 | 1528 |
| Rio Hondo At Roswell, NM | Rio Hondo | usbr_hydrodata, usgs | 1981-02-16 | 1997-05-12 | 848 |
| Rio Hondo At Diamond A Ranch Nr Roswell, NM | Rio Hondo | nwps, usace_cwms, usgs | 1939-10-02 | 2026-10-26 | 4544 |
| Rio Hondo Blw Diamond A Dam Nr Roswell, NM | Rio Hondo | usace_cwms, usgs | 1963-09-30 | 2026-10-26 | 3292 |