USGS Streamgage 12179000
Skagit River above Alma Creek near Marblemount, WA
Skagit River above Alma Creek near Marblemount, WA is USGS streamgage 12179000 in Washington, monitoring river discharge in hydrologic subbasin 17110005. It drains a watershed of about 1,274 square miles. Discharge records at this site go back to 1950. Typical flow runs near 6,333.5 cfs in July and 4,591.3 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Washington
- Drainage area
- 1,274 sq mi
- Gauge elevation
- 407 ft
- Subbasin (HUC-8)
- 17110005
- Coordinates
- 48.60734, -121.36152
- USGS site number
- 12179000
- Records begin
- 1950-10-01 (76 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 76 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 | 3,722.6 | 5,729.4 | 7,716.8 | |
| February | 3,402.4 | 5,640 | 7,750.7 | |
| March | 3,063.9 | 5,059.7 | 6,973.9 | |
| April | 2,873 | 4,591.3 | 6,688.7 | |
| May | 2,870.3 | 4,669.4 | 7,962.3 | |
| June | 3,179 | 5,813.7 | 12,473.3 | |
| July | 3,202.3 | 6,333.5 | 12,551.9 | |
| August | 2,614.2 | 4,001.9 | 6,465.8 | |
| September | 1,967.7 | 3,402.3 | 4,962.3 | |
| October | 2,066.8 | 3,672.6 | 6,230.6 | |
| November | 3,038.3 | 4,940.7 | 9,069.3 | |
| December | 3,467.7 | 5,225.2 | 8,189 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Bacon Creek below Oakes Creek near Marblemount, WA
- Skagit River above Diobsud Creek near Marblemount, WA
- Diobsud Creek near Marblemount, WA
- Skagit River at Marblemount, WA
- Cascade River at Marblemount, WA
- Skagit River at Corkindale, WA
- Skagit River at Rockport, WA
- Skagit River above Miller Creek near Rockport, WA