About this river
Lewis Narrows is a 3.8 mile river near Boundary Waters Outfitters in Minnesota. Streamflow is measured at the USGS gauge Basswood River near Winton, MN (site 05127500). The mapped line runs from 48.0378, -91.6973 to 48.0720, -91.6739. The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1931 to 2026
Lewis Narrows typically runs highest in May, at a median 3,470 cfs, and lowest in March, at 522 cfs. The highest flow on record for any single day is 15,200 cfs, in 1950.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 694 | 446 to 925 | |
| February | 562 | 431 to 710 | |
| March | 522 | 425 to 685 | |
| April | 857 | 602 to 1,220 | |
| May | 3,470 | 2,260 to 4,980 | |
| June | 2,370 | 1,745 to 3,265 | |
| July | 1,580 | 1,100 to 2,230 | |
| August | 860 | 588 to 1,250 | |
| September | 671 | 429 to 1,030 | |
| October | 680 | 371 to 1,180 | |
| November | 695 | 382 to 1,150 | |
| December | 727 | 467 to 1,140 |
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 95 years of record. Statistics published by the US Geological Survey for Basswood River near Winton, MN (site 05127500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Lewis Narrows's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
