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 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
71
Moderate
Drought index
106
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
20%
of 5 reporting
Median flow
176%
p59 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 nr Conroe, TX0806800064 cfsp55 · normal
- Lake Ck at Sendera Ranch Rd nr Conroe, TX0806792019 cfsp59 · normal
- W Fk San Jacinto Rv abv Lk Houston nr Porter, TX08068090169 cfsp72 · normal
- W Fk San Jacinto Rv nr Humble, TX08069500767 cfsp84 · above 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, TX08067650106 cfsno long-term record
- Lake Ck nr Dobbin, TX080676900 cfsno long-term record
- Stewarts Ck at Silverdale Dr nr Conroe, TX08068002317 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 106 | 0 | 1/5 | p59 |
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