San Ambrosia-Santa Isabel HUC8 13080002
A 14,940 km² sub-basin of the Rio Grande region in MX, TX. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
55
Moderate
Drought index
306
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
298%
p85 of record
Water assets
477
8 springs · 223 wells
USGS gauges (1)
- Zacate Ck at Laredo, TX084589952 cfsp85 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 306 | 100 | 0/1 | p85 |
| 2026-10-20 | 306 | 100 | 0/1 | p83 |
| 2026-10-19 | 306 | 100 | 0/1 | p90 |
| 2026-10-18 | 306 | 100 | 0/1 | p88 |
| 2026-10-17 | 306 | 100 | 0/1 | p82 |
| 2026-10-16 | 306 | 100 | 0/1 | p72 |
| 2026-10-15 | 306 | 100 | 0/1 | p79 |
| 2026-10-14 | 306 | 100 | 0/1 | p80 |
| 2026-10-13 | 306 | 100 | 0/1 | p87 |
| 2026-10-12 | 306 | 100 | 0/1 | p87 |
| 2026-10-11 | 306 | 100 | 0/1 | p85 |
| 2026-10-10 | 306 | 100 | 0/1 | p83 |
| 2026-10-09 | 306 | 100 | 0/1 | p83 |
| 2026-10-08 | 300 | 100 | 1/1 | p0 |
Top water assets
- 66Lake Casa Blanca Damreservoir
- 65Wright Dam No 2reservoir
- 65Carr Lake Damreservoir
- 65San Isidro Detention Pond No 3 Damreservoir
- 65Rachal Mine Pond Sp-1 Damreservoir
- 65Watson Pond Damreservoir
- 65Pilla Tank Damreservoir
- 65Palafox Mine Pond Sp-12 Damreservoir
- 65Lower Guajalote Damreservoir
- 65Ojitos Trap Damreservoir