Chehalis River at Porter
WA · USGS gauge 12031000
Discharge
432
CFS
7-day range
424–516
CFS
Catalog range
1,000–15,000
CFS · reference
Flood stage
25,000
CFS · catalog
Last 7 days
7-day low 424 CFS high 516 CFS
Source: USGS National Water Information System, gauge 12031000
Reading Jul 26, 6:45 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
- Terminal reach in the catalog drainage graph.
- Receives Wynoochee River (Near Montesano)
- Receives South Fork Chehalis River (South Fork)
- Receives Satsop River (Near Satsop)
- Receives Newaukum River (Near Chehalis)
- Receives Skookumchuck River (Near Bucoda)
Reach data
- Gauge location: 46.9393, -123.3143
- Gauge data cadence: ~15-minute readings (USGS)
FAQ
- What USGS gauge measures the Chehalis River at Porter?
- USGS gauge 12031000. It reports discharge in cubic feet per second (CFS), typically updating every 15 minutes, published by the USGS National Water Information System.
- 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 12031000 for you — set a CFS range for the Chehalis River and get a push notification when the river enters it. Free for 14 days.
