Black River (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.
Warnings (4)
- warning: gap Black River At Harkey Crossing Nr Malaga, NM: 1 gap of 60+ days inside the record (638 days in all). Longest: Dec 14, 2021 to Sep 12, 2023 (638 days).
- warning: gap Black River At Malaga, NM: 1 gap of 60+ days inside the record (703 days in all). Longest: Oct 27, 2021 to Sep 29, 2023 (703 days).
- warning: negative Black River At Malaga, NM: 2 days with negative flow (lowest -1.5 cfs, Apr 17, 2025 to Apr 18, 2025). Negative values usually mean reverse flow, backwater or a computed (not measured) record.
- warning: gap Black River Below Blue Springs Nr Whites City, NM: 1 gap of 60+ days inside the record (575 days in all). Longest: Feb 15, 2022 to Sep 12, 2023 (575 days).
Context (4)
Show 4 notes
- flatline Black River Above Malaga, NM: 6 runs of 30+ days at exactly the same flow: 11.0 cfs for 45 days from Sep 29, 1988; 13.0 cfs for 44 days from Nov 8, 1993; 11.0 cfs for 41 days from Oct 31, 1991. Usually an estimated period (ice, a broken gauge) rather than measured daily flow.
- spike Black River Above Malaga, NM: 1 single-day flow far above the gauge's usual range (99th percentile 55 cfs) with no annual peak on record to confirm them: 1,050 cfs on Oct 26, 2026. Flash floods are common here, but these are unverified.
- spike Black River At Malaga, NM: 4 single-day flows far above the gauge's usual range (99th percentile 77 cfs) with no annual peak on record to confirm them: 1,230 cfs on Apr 4, 2004; 621 cfs on Apr 26, 2025; 494 cfs on Oct 26, 2026. Flash floods are common here, but these are unverified.
- single gauge Upper Pecos-Black: 69% of this segment's weeks rest on a single gauge; the segment value is that gauge in those weeks, and jumps when other gauges join or drop out.
Values removed (0)
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.
None.
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 |
|---|---|---|---|---|---|
| Black River At Malaga, NM | Upper Pecos-Black | nwps, usgs | 2000-02-21 | 2026-10-26 | 1287 |
| Black River At Harkey Crossing Nr Malaga, NM | Upper Pecos-Black | usgs | 2019-07-01 | 2026-10-26 | 291 |
| Black River Above Malaga, NM | Upper Pecos-Black | nwps, usgs | 1946-12-30 | 2026-10-26 | 4166 |
| Black River Below Blue Springs Nr Whites City, NM | Upper Pecos-Black | usgs | 2019-07-01 | 2026-10-26 | 297 |