West Fork San Jacinto HUC8 12040101
A 2,801 km² sub-basin of the Texas-Gulf region in 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
64
Moderate
Drought index
168
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
40%
of 5 reporting
Median flow
69%
p27 of record
Water assets
1,117
0 springs · 643 wells
USGS gauges (12)
- W Fk San Jacinto Rv nr Huntsville, TX080675480 cfsp10 · below normal
- W Fk San Jacinto Rv abv Lk Houston nr Porter, TX0806809043 cfsp20 · below normal
- Lake Ck at Sendera Ranch Rd nr Conroe, TX080679206 cfsp27 · normal
- W Fk San Jacinto Rv nr Conroe, TX0806800033 cfsp33 · normal
- W Fk San Jacinto Rv nr Humble, TX0806950060 cfsp43 · normal
- West Sandy Ck at FM 1791 nr Richards, TX080675520 cfsno long-term record
- East Sandy Ck at FM 1374 nr New Waverly, TX080675552 cfsno long-term record
- Caney Ck at FM 1375 nr Richards, TX080675750 cfsno long-term record
- Little Lake Ck at FM 149 nr Montgomery, TX080675850 cfsno long-term record
- W Fk San Jacinto Rv bl Lk Conroe nr Conroe, TX08067650101 cfsno long-term record
- Lake Ck nr Dobbin, TX080676900 cfsno long-term record
- Stewarts Ck at Silverdale Dr nr Conroe, TX08068002204 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 168 | 0 | 2/5 | p27 |
| 2026-10-19 | 168 | 0 | 1/5 | p30 |
| 2026-10-18 | 168 | 0 | 1/5 | p30 |
| 2026-10-17 | 168 | 0 | 1/4 | p29 |
| 2026-10-16 | 168 | 0 | 1/5 | p36 |
| 2026-10-15 | 155 | 0 | 1/5 | p39 |
| 2026-10-14 | 155 | 0 | 1/5 | p38 |
| 2026-10-13 | 155 | 0 | 1/5 | p41 |
| 2026-10-12 | 155 | 0 | 2/5 | p35 |
| 2026-10-11 | 155 | 0 | 1/5 | p53 |
| 2026-10-10 | 155 | 0 | 1/5 | p50 |
| 2026-10-09 | 155 | 0 | 1/5 | p52 |
| 2026-10-08 | 193 | 0 | 0/5 | p75 |
| 2026-10-07 | 193 | 0 | 0/5 | p92 |
Top water assets
- 66Rushing Springs Lake Damreservoir
- 66Lewis Creek Damreservoir
- 66Elkins Lake Damreservoir
- 66Huntsville State Park Damreservoir
- 66Majestic Lake Damreservoir
- 66Conroe Damreservoir
- 65Old Trailway Lake Damreservoir
- 65Moran Ranch Damreservoir
- 65East Sandy Ck At Fm 1374 Nr New Waverly, Txriver
- 65Karp South Pine Lake Damreservoir