Trinity River above Nf Trinity River near Helena CA
USGS Site No: 11526400 • Trinity River • Trinity County, CA
Trinity River above Nf Trinity River near Helena CA on the Trinity River is currently at 1,150 cfs (Very High — 97th percentile for this date) . Gage height: 10.50 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 | 315 | |
| 25th | Low threshold | 347 | |
| 50th (Median) | Normal (median) | 400 | |
| 75th | High threshold | 437 | |
| 95th | Very High threshold | 923 |
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 | 1,190 | — |
| May 27, 2026 | 1,120 | — |
| May 26, 2026 | 1,110 | — |
| May 25, 2026 | 1,130 | — |
| May 24, 2026 | 1,150 | — |
| May 23, 2026 | 1,250 | — |
| May 22, 2026 | 1,170 | — |
| May 21, 2026 | 1,150 | — |
| May 20, 2026 | 1,160 | — |
| May 19, 2026 | 1,200 | — |
| May 18, 2026 | 1,210 | — |
| May 17, 2026 | 1,220 | — |
| May 16, 2026 | 1,250 | — |
| May 15, 2026 | 1,290 | — |
| Apr 20, 2026 | 1,430 | — |
| Apr 19, 2026 | 1,340 | — |
| Apr 18, 2026 | 1,370 | — |
| Apr 17, 2026 | 1,560 | — |
| Apr 16, 2026 | 1,860 | — |
| Apr 15, 2026 | 2,010 | — |
| Apr 14, 2026 | 1,550 | — |
| Apr 13, 2026 | 1,520 | — |
| Apr 12, 2026 | 1,600 | — |
| Apr 11, 2026 | 1,410 | — |
| Apr 10, 2026 | 1,400 | — |
| Apr 9, 2026 | 1,320 | — |
| Apr 8, 2026 | 1,440 | — |
| Apr 7, 2026 | 1,070 | — |
| Apr 6, 2026 | 804 | — |
| Apr 5, 2026 | 849 | — |
Station Information
- USGS Site No
- 11526400
- State
- CA
- County
- Trinity County
- Coordinates
- 40.7665, -123.1144
- Drainage Area
- 1,137 mi²
- Datum (ft)
- 1,356.6
- HUC Code
- 18010211
Recent Extremes
- Max discharge
-
9,510 cfsDec 26, 2025
- Min discharge
-
305 cfsOct 24, 2025
Computed from the local daily-values archive.
Nearby Gauges
-
Trinity River at Junction City CAVery High3.8 mi · 986 cfs
-
Trinity River at Douglas City CAVery High11.8 mi · 996 cfs
-
Trinity River below Limekiln Gulch near Douglas City CAVery High12.0 mi · 982 cfs
-
Indian C near Douglas City CAHigh13.1 mi · 21 cfs
-
Rush C near Lewiston CAHigh14.9 mi · 12 cfs