Station operated in cooperation with Consumers Energy and the Michigan Department of Environment, Great Lakes and Energy.
| Min (1961) | 25th percen- tile | Median | Most Recent Instantaneous Value Jan 23 | Mean | 75th percen- tile | Max (1997) |
|---|---|---|---|---|---|---|
| 175 | 232 | 256 | 262 | 270 | 282 | 594 |