The above chart provides a weekly 'snapshot' of water levels on Mississippi Lake.
During periods of rapid change in water levels (spring runoff or severe storms) the chart may be updated at more frequent intervals. Throughout most of the year, the levels should track within the target range (black lines). During the spring runoff, there is no target range due to the variability in timing of spring melt and ice conditions. Through most of the summer we would expect to see a gradual decline in levels (within the target range).
Historical Data: the following is available in tabular format:
Weekly historical levels for the years 2014 to 2025
The Mississippi Lake water level chart is produced by MLA, using information gathered by the Mississippi Valley Conservation Authority (MVCA). Here are direct links to the MVCA website for additional information regarding the entire Mississippi River Watershed:
FLOOD WARNING information. It is important to note that severe storms, with subsequent heavy rainfall, may result in fairly rapid increases in water levels. Consult the MVCA for detailed information and guidance regarding flooding conditions;
Water Levels elsewhere in the Watershed. MVCA tracks lake levels and stream flow throughout the watershed.
Mailing Lists to subscribe directly to MVCA for information regarding a variety of topics.
Notes for 2026
12 May 26 - MVCA has reverted the Mississippi River watershed to Normal status
11 May 26 - level has dropped to 134.35 MASL
5 May 26 - MVCA issued a Water Safety Statement
4 May 26 - level has decreased to 134.53 MASL
28 Apr 26 - MVCA issued a Flood Watch Statement
27 Apr 26 - level has decreased slightly to 134.80 MASL
22 Apr 26 - MVCA issued a Flood Warning
20 Apr 26 - level has increased to 134.87 MASL. MVCA issued a Flood Watch Update
17 Apr 26 - Ice Out !
13 Apr 26 - level has risen sharply to 134.73 MASL. Peak for 2026. MVCA has issued a Flood Watch Statement
8 Apr 26 - See MVCA's Flood Outlook Statement issued 8 Apr 26
6 Apr 26 - level has jumped up to 134.50 MASL
30 Mar 26 - level has dropped to 134.36 MASL. MVCA issued a Flood Outlook Statement
23 Mar 26 - level is 134.47 MASL
17 Mar 26 - MVCA issued a Water Safety Statement
16 Mar 26 - level has risen by 31 cm to 134.45 MASL.
9 Mar 26 - level is 134.14.
4 Mar 26 - MVCA issued a Flood Outlook Statement
23 Feb 26 - level has again decreased slightly to 134.14 MASL
9 Feb 26 - level is 134.16 MASL
02 Feb 26 - level has decreased slightly to 134.18 MASL
26 Jan 26 - level has increased slightly to 134.21 MASL
19 Jan 26 - level has increased to 134.18 MASL
12 Jan 26 - level has increased slightly to 134.12 MASL
5 Jan 26 - level remains at 134.08 MASL. Happy New Year to all!