Grand River at Portland, MI
River level and flood forecast · Ionia County
The river is 6.2 ft below flood stage (12 ft).
Flow: 367 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Grand River at Portland to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 16 ft |
| Moderate flood stage | 14 ft |
| Flood stage | 12 ft |
| Action stage | 11 ft |
| Record crest (April 21, 1975) | 12.98 ft |
What floods at each level
From the National Weather Service, highest first.
- 16 ftExpect major flooding of the business district and residential areas in the Village of Lyons and basement flooding of residences on the west side of Kent Street in Portland.
- 14 ftExpect moderate flooding of the first floor of residences and businesses in the south section of the Village of Lyons. Elizabeth, Superior, and Railroad Streets in the Village of Lyons closed due to flooding.
- 12 ftExpect minor flooding in the Village of Lyons and low lying areas adjacent to the river. Two Rivers Park in Portland flooded.
- 11 ftRiver is bankfull. Expect minor flooding of low areas along the river upstream and downstream of Portland.
Highest crests on record
- 12.98 ft — April 21, 1975
- 12.84 ft — May 24, 2004
- 12.62 ft — February 23, 2018
- 12.45 ft — February 27, 2019
- 12.21 ft — April 6, 2023
Recent crests: 10.25 ft (January 28, 2024) · 12.21 ft (April 6, 2023) · 9.37 ft (April 25, 2022) · 10.59 ft (June 27, 2021) · 11.32 ft (May 19, 2020)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (PORM4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.