Trinity River at Lewiston CA
USGS Site No: 11525500 • Trinity River • Trinity County, CA
Trinity River at Lewiston CA on the Trinity River is currently at 888 cfs (Very High — 111th percentile for this date) . Gage height: 14.65 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 28 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.
| Percentile | Label | CFS Threshold | Today's Flow |
|---|---|---|---|
| 10th | Very Low threshold | 242 | |
| 25th | Low threshold | 265 | |
| 50th (Median) | Normal (median) | 299 | |
| 75th | High threshold | 312 | |
| 95th | Very High threshold | 338 |
30-Day Hydrograph
Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 899 | — |
| May 27, 2026 | 891 | — |
| May 26, 2026 | 901 | — |
| May 25, 2026 | 895 | — |
| May 24, 2026 | 900 | — |
| May 23, 2026 | 941 | — |
| May 22, 2026 | 946 | — |
| May 21, 2026 | 955 | — |
| May 20, 2026 | 923 | — |
| May 19, 2026 | 1,010 | — |
| May 18, 2026 | 1,010 | — |
| May 17, 2026 | 1,010 | — |
| May 16, 2026 | 1,010 | — |
| May 15, 2026 | 1,060 | — |
| Apr 20, 2026 | 954 | — |
| Apr 19, 2026 | 1,000 | — |
| Apr 18, 2026 | 831 | — |
| Apr 17, 2026 | 1,180 | — |
| Apr 16, 2026 | 1,150 | — |
| Apr 15, 2026 | 1,690 | — |
| Apr 14, 2026 | 1,120 | — |
| Apr 13, 2026 | 840 | — |
| Apr 12, 2026 | 839 | — |
| Apr 11, 2026 | 855 | — |
| Apr 10, 2026 | 913 | — |
| Apr 9, 2026 | 919 | — |
| Apr 8, 2026 | 1,030 | — |
| Apr 7, 2026 | 1,200 | — |
| Apr 6, 2026 | 387 | — |
| Apr 5, 2026 | 383 | — |
Station Information
- USGS Site No
- 11525500
- State
- CA
- County
- Trinity County
- Coordinates
- 40.7247, -122.8011
- Drainage Area
- 719 mi²
- Datum (ft)
- 1,821.5
- HUC Code
- 18010211
Recent Extremes
- Max discharge
-
5,840 cfsDec 26, 2025
- Min discharge
-
262 cfsNov 4, 2025
Computed from the local daily-values archive.
Nearby Gauges
-
Rush C near Lewiston CAHigh1.8 mi · 12 cfs
-
Trinity River below Limekiln Gulch near Douglas City CAVery High7.2 mi · 982 cfs
-
Indian C near Douglas City CAHigh7.8 mi · 21 cfs
-
Trinity River at Douglas City CAVery High9.8 mi · 996 cfs
-
Trinity River at Junction City CAVery High13.7 mi · 986 cfs