The Sny HUC8 07110004
A 5,147 km² sub-basin of the Upper Mississippi region in IL, MO. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
77
Healthy
Drought index
102
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 2 reporting
Median flow
113%
p44 of record
Water assets
3,214
2 springs · 1,470 wells
USGS gauges (2)
- Bear Creek at Hannibal, MO055020001 cfsp32 · normal
- North River at Palmyra, MO0550100016 cfsp56 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 102 | 0 | 0/2 | p44 |
| 2026-10-20 | 102 | 0 | 0/2 | p47 |
| 2026-10-19 | 102 | 0 | 0/2 | p52 |
| 2026-10-18 | 102 | 0 | 0/2 | p52 |
| 2026-10-17 | 102 | 0 | 0/2 | p43 |
| 2026-10-16 | 102 | 0 | 0/2 | p39 |
| 2026-10-15 | 95 | 0 | 1/2 | p33 |
| 2026-10-14 | 95 | 0 | 0/2 | p47 |
| 2026-10-13 | 95 | 0 | 1/2 | p36 |
| 2026-10-12 | 95 | 0 | 0/2 | p53 |
| 2026-10-11 | 95 | 0 | 0/2 | p51 |
| 2026-10-10 | 95 | 0 | 0/2 | p52 |
| 2026-10-09 | 95 | 0 | 0/2 | p54 |
| 2026-10-08 | 95 | 0 | 0/2 | p53 |
Top water assets
- 66Stone Lake Damreservoir
- 66Stormwater Management Damreservoir
- 66Hunnewell Lake Damreservoir
- 66Clarence Cannon Mem Watershed Dam 9reservoir
- 66Fieldstone Subdivision Twin Dams-South Damreservoir
- 66Clarence Cannon #1 Damreservoir
- 66Bowling Green Dam #2reservoir
- 66Magee Lake Damreservoir
- 66Clarence Cannon Mem Watershed Dam 11reservoir
- 66Hadley Creek Ws Str 29-6reservoir