| Station: | Grand Rapids, Mich. | Continent: | North America | ||
| River: | Grand | Major Basin : | Lake Michigan | ||
| Country: | United States | Discharge into : | Atlantic Ocean | ||
| Observation Period: | 1965 - 1984 | Total Months: | 240 | ||
| Latitude (dec deg): | 42.96 N | Area (km2): | 12691 | ||
| Longitude (dec deg): | 85.68 W | Elevation (m): | 179 | ||
| Annual Discharge: (m3/s): | 111.7 | (km3/yr): | 3.5 | ||
| Annual Runoff: (l/s/km2): | 8.8 | (mm/yr): | 277.5 |
| Mean for Observation Period | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| m3/sec | 105.2 | 131.6 | 216.6 | 228.3 | 139.6 | 91.1 | 62.0 | 49.0 | 57.6 | 66.9 | 78.0 | 116.3 |
| km3/mo | 0.3 | 0.3 | 0.6 | 0.6 | 0.4 | 0.2 | 0.2 | 0.1 | 0.1 | 0.2 | 0.2 | 0.3 |
| mm/mo | 22.2 | 25.1 | 45.7 | 46.6 | 29.5 | 18.6 | 13.1 | 10.3 | 11.8 | 14.1 | 15.9 | 24.6 |
| l/s/km2 | 8.3 | 10.4 | 17.1 | 18.0 | 11.0 | 7.2 | 4.9 | 3.9 | 4.5 | 5.3 | 6.1 | 9.2 |
