About this river
Flat River is a 3.9 mile river near Wolf head outfitters in Missouri. Streamflow is measured at the USGS gauge Big River below Desloge, MO (site 07017260). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1988 to 2026
Flat River typically runs highest in April, at a median 333 cfs, and lowest in October, at 39 cfs. The highest flow on record for any single day is 29,100 cfs, in 2017.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 205 | 73 to 398 | |
| February | 217 | 96 to 510 | |
| March | 282 | 154 to 584 | |
| April | 333 | 175 to 588 | |
| May | 269 | 118 to 545 | |
| June | 102 | 72 to 195 | |
| July | 81 | 45 to 147 | |
| August | 58 | 40 to 132 | |
| September | 46 | 34 to 67 | |
| October | 39 | 35 to 57 | |
| November | 73 | 49 to 164 | |
| December | 86 | 49 to 217 |
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 13 years of record. Statistics published by the US Geological Survey for Big River below Desloge, MO (site 07017260). 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 Flat 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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