South Fork Chehalis River at South Fork
WA · USGS gauge 12020800
Discharge
—
CFS
7-day range
—
CFS
Catalog range
150–2,400
CFS · reference
Flood stage
5,000
CFS · catalog
Source: USGS National Water Information System, gauge 12020800
No recent discharge data · retrieved Jul 26, 7:11 AM PDT
Catalog range and flood stage: Baseline Maps river catalog (reference data, updated with the app). USGS data is provisional and subject to revision.
Drainage
- Flows into Chehalis River
Reach data
- Gauge location: 46.4448, -123.0837
- Whitewater classification (catalog): Class I-II — Easy tributary float
- Gauge data cadence: ~15-minute readings (USGS)
FAQ
- What USGS gauge measures the South Fork Chehalis River at South Fork?
- USGS gauge 12020800. It reports discharge in cubic feet per second (CFS), typically updating every 15 minutes, published by the USGS National Water Information System.
- Where does the South Fork Chehalis River flow?
- Per the Baseline Maps river catalog, this reach flows into Chehalis River.
- What do the fishable-range numbers on this page mean?
- They are reference figures from the Baseline Maps river catalog — a compiled low/high discharge range and flood stage for this reach. They are catalog data, not a recommendation; conditions, regulations, and safety are always the angler's own call.
Track this gauge with flow alerts.
Baseline Maps watches USGS gauge 12020800 for you — set a CFS range for the South Fork Chehalis River and get a push notification when the river enters it. Free for 14 days.
