Cowlitz River Below Mayfield Dam, WA
USGS Site No: 14238000 • Cowlitz River • Lewis County, WA
Cowlitz River Below Mayfield Dam, WA on the Cowlitz River is currently at 4,190 cfs (Low — 19th percentile for this date) . Gage height: 11.05 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 | 3,330 | |
| 25th | Low threshold | 4,730 | Today: 4,190 cfs |
| 50th (Median) | Normal (median) | 6,250 | |
| 75th | High threshold | 8,790 | |
| 95th | Very High threshold | 15,900 |
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 | 4,260 | — |
| May 27, 2026 | 4,640 | — |
| May 26, 2026 | 5,340 | — |
| May 25, 2026 | 4,620 | — |
| May 24, 2026 | 4,600 | — |
| May 23, 2026 | 4,600 | — |
| May 22, 2026 | 4,610 | — |
| May 21, 2026 | 4,630 | — |
| May 20, 2026 | 4,670 | — |
| May 19, 2026 | 5,440 | — |
| May 18, 2026 | 4,710 | — |
| May 17, 2026 | 5,110 | — |
| May 16, 2026 | 5,110 | — |
| May 15, 2026 | 5,110 | — |
| Apr 20, 2026 | 5,750 | — |
| Apr 19, 2026 | 5,790 | — |
| Apr 18, 2026 | 5,770 | — |
| Apr 17, 2026 | 6,770 | — |
| Apr 16, 2026 | 5,670 | — |
| Apr 15, 2026 | 5,680 | — |
| Apr 14, 2026 | 5,720 | — |
| Apr 13, 2026 | 5,740 | — |
| Apr 12, 2026 | 5,800 | — |
| Apr 11, 2026 | 10,200 | — |
| Apr 10, 2026 | 10,500 | — |
| Apr 9, 2026 | 10,500 | — |
| Apr 8, 2026 | 10,600 | — |
| Apr 7, 2026 | 10,600 | — |
| Apr 6, 2026 | 11,000 | — |
| Apr 5, 2026 | 11,600 | — |
Station Information
- USGS Site No
- 14238000
- State
- WA
- County
- Lewis County
- Coordinates
- 46.5104, -122.6162
- Drainage Area
- 1,400 mi²
- Datum (ft)
- 226.6
- HUC Code
- 17080005
Recent Extremes
- Max discharge
-
29,000 cfsDec 14, 2025
- Min discharge
-
2,320 cfsJul 19, 2025
Computed from the local daily-values archive.
Nearby Gauges
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