South Fork Chehalis River near Reel Adrenaline Guide Service
About this river
South Fork Chehalis River is a 3.1 mile river near Reel Adrenaline Guide Service in Washington. Streamflow is measured at USGS gauge site 12020800. The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1999 to 2026
South Fork Chehalis River typically runs highest in January, at a median 194 cfs, and lowest in October, at 18 cfs. The highest flow on record for any single day is 8,120 cfs, in 2008.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 194 | 119 to 338 | |
| February | 129 | 97 to 220 | |
| March | 136 | 96 to 227 | |
| April | 103 | 66 to 160 | |
| October | 18 | 10 to 43 | |
| November | 140 | 51 to 289 | |
| December | 189 | 100 to 332 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 28 years of record. Statistics published by the US Geological Survey for USGS gauge 12020800 (site 12020800). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show South Fork Chehalis River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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