Nf Big Lost River at Wild Horse near Chilly ID
USGS Site No: 13120000 • Nf Big Lost River • Custer County, ID
Nf Big Lost River at Wild Horse near Chilly ID on the Nf Big Lost River is currently at 335 cfs (Normal — 38th percentile for this date) . Gage height: 3.31 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for June 11 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 | 183 | |
| 25th | Low threshold | 258 | |
| 50th (Median) | Normal (median) | 406 | Today: 335 cfs |
| 75th | High threshold | 497 | |
| 95th | Very High threshold | 852 |
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 | 364 | — |
| May 27, 2026 | 347 | — |
| May 26, 2026 | 338 | — |
| May 25, 2026 | 287 | — |
| May 24, 2026 | 237 | — |
| May 23, 2026 | 207 | — |
| May 22, 2026 | 203 | — |
| May 21, 2026 | 204 | — |
| May 20, 2026 | 213 | — |
| May 19, 2026 | 232 | — |
| May 18, 2026 | 263 | — |
| May 17, 2026 | 301 | — |
| May 16, 2026 | 342 | — |
| May 15, 2026 | 392 | — |
| Apr 20, 2026 | 102 | — |
| Apr 19, 2026 | 103 | — |
| Apr 18, 2026 | 104 | — |
| Apr 17, 2026 | 105 | — |
| Apr 16, 2026 | 122 | — |
| Apr 15, 2026 | 127 | — |
| Apr 14, 2026 | 132 | — |
| Apr 13, 2026 | 147 | — |
| Apr 12, 2026 | 163 | — |
| Apr 11, 2026 | 164 | — |
| Apr 10, 2026 | 148 | — |
| Apr 9, 2026 | 135 | — |
| Apr 8, 2026 | 126 | — |
| Apr 7, 2026 | 115 | — |
| Apr 6, 2026 | 105 | — |
| Apr 5, 2026 | 102 | — |
Station Information
- USGS Site No
- 13120000
- State
- ID
- County
- Custer County
- Coordinates
- 43.9328, -114.1139
- Drainage Area
- 115 mi²
- Datum (ft)
- 6,862.0
- HUC Code
- 170402180304
Flood Stage Thresholds
- Action Stage
- 4.8 ft
- Flood Stage
- 5.1 ft
Currently 1.80 ft below flood stage.
Recent Extremes
- Max discharge
-
457 cfsJun 1, 2025
- Min discharge
-
19 cfsJan 26, 2026
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Big Lost River at Howell Ranch near Chilly IDNormal6.5 mi · 1,130 cfs
-
Warm Springs Creek Below Diversion near Mackay IDNormal16.1 mi · 18 cfs
-
Thousand Springs Creek near Chilly IDNormal16.4 mi · 6 cfs
-
Trail Creek near Sun Valley, IDNormal17.9 mi · 206 cfs
-
Nf Big Wood River near Sawtooth Nra Hq near Ketchum IDNormal18.3 mi · 196 cfs