USGS Streamgage 12200500
Skagit River near Mount Vernon, WA
Skagit River near Mount Vernon, WA is USGS streamgage 12200500 in Washington, monitoring river discharge in hydrologic subbasin 17110007. It drains a watershed of about 3,093 square miles. Discharge records at this site go back to 1906. Typical flow runs near 17,441.9 cfs in July and 14,133.3 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Washington
- Drainage area
- 3,093 sq mi
- Gauge elevation
- 19 ft
- Subbasin (HUC-8)
- 17110007
- Coordinates
- 48.44483, -122.33544
- USGS site number
- 12200500
- Records begin
- 1906-11-01 (120 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 86 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 9,636.8 | 16,329 | 29,138.7 | |
| February | 9,230.7 | 14,734.5 | 25,896.6 | |
| March | 8,670 | 13,451.6 | 21,448.4 | |
| April | 9,692.7 | 14,133.3 | 21,210 | |
| May | 12,435.5 | 18,664.5 | 30,445.2 | |
| June | 13,896.7 | 22,280 | 35,846.7 | |
| July | 10,418.1 | 17,441.9 | 31,661.3 | |
| August | 7,334.2 | 10,274.8 | 17,329 | |
| September | 6,004.3 | 8,302 | 13,930 | |
| October | 5,791.9 | 10,280.3 | 22,061.3 | |
| November | 8,442 | 15,383.3 | 34,300 | |
| December | 9,546.8 | 15,645.2 | 31,083.9 |
All values in cubic feet per second (cfs).