USGS Streamgage 12199000
Skagit River near Sedro Woolley, WA
Skagit River near Sedro Woolley, WA is USGS streamgage 12199000 in Washington, monitoring river discharge in hydrologic subbasin 17110007. It sits on the Skagit River, alongside 11 other gauges Rivermatics tracks on the same river. It drains a watershed of about 3,015 square miles. Discharge records at this site go back to 1815. Typical flow runs near 21,448.4 cfs in July and 13,206.7 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Washington
- Drainage area
- 3,015 sq mi
- Gauge elevation
- 30 ft
- Subbasin (HUC-8)
- 17110007
- Coordinates
- 48.484, -122.24321
- USGS site number
- 12199000
- Records begin
- 1815-01-01 (211 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 73 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 | 5,749 | 11,383.2 | 29,412.9 | |
| February | 5,429.3 | 10,321.7 | 20,321.4 | |
| March | 5,703.5 | 10,287.7 | 19,780.6 | |
| April | 7,955 | 13,206.7 | 21,613.3 | |
| May | 11,105.5 | 19,993.5 | 38,258.1 | |
| June | 13,203.3 | 26,310 | 50,173.3 | |
| July | 10,688.1 | 21,448.4 | 35,551.6 | |
| August | 8,256.5 | 11,456.5 | 18,645.2 | |
| September | 5,226.3 | 8,262.7 | 14,132 | |
| October | 4,571 | 7,079.4 | 20,666.8 | |
| November | 6,144 | 12,137 | 34,950 | |
| December | 6,382.3 | 12,619.4 | 43,319.4 |
All values in cubic feet per second (cfs).
Common questions
- When does Skagit River near Sedro Woolley, WA normally run highest?
- June, on the long-term record. The median daily flow that month is about 26,310 cfs, against 7,079.4 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Skagit River near Sedro Woolley, WA?
- It depends on the month. In January, half of days historically fall near 11,383.2 cfs, with the middle 80% of days between 5,749 and 29,412.9 cfs. The month-by-month table on this page gives the full range.
- How long has Skagit River near Sedro Woolley, WA been measured?
- Discharge records at USGS site 12199000 begin in 1815, about 211 years, covering roughly 85 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Skagit River near Sedro Woolley, WA?
- The gauge sits at 48.484, -122.24321, in Washington, in hydrologic subbasin 17110007, at an elevation of about 30 feet, draining roughly 3,015 square miles.
- Can I use Skagit River near Sedro Woolley, WA data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Upstream and downstream on the Skagit River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Skagit River in full.
- Skagit River at Newhalem, WA 1,175 sq mi
- Skagit River above Alma Creek near Marblemount, WA 1,274 sq mi
- Skagit River at Marblemount, WA 1,381 sq mi
- Skagit River near Concrete, WA 2,737 sq mi
- Skagit River near Sedro Woolley, WA this page
- Skagit River near Mount Vernon, WA 3,093 sq mi
- Skagit River above Diobsud Creek near Marblemount, WA
- Skagit River above Miller Creek near Rockport, WA
- Skagit River at Corkindale, WA
- Skagit River at Rockport, WA
- Skagit River below Babcock Creek near Newhalem, WA
- Skagit River below Damnation Creek near Marblemount, WA