This past month the water supply to the Lake Superior basin was well below its long-term average for January, while the supply to the Lakes Michigan-Huron basin was above its January average.
The levels of Lake Superior and Lakes Michigan-Huron remain below their chart datum levels.
The level of Lake Superior is expected to continue to decline during the next couple of months, while that of Lakes Michigan-Huron is expected to remain about the same.
Currently, the Lake Superior level is about 45 cm (18 inches) below its long-term average beginning-of-February level, and is 35 cm (14 inches) below the level recorded a year ago.
This past month the level of Lake Superior fell by about 10 cm (4 inches), while on average it falls by seven cm (3 inches) in January.
The last time Lake Superior was lower at this time of year was in February 1926.
The level of Lakes Michigan-Huron fell by one cm (1/2 inch) this January, while on average the level of these lakes decline by about three cm (one inch) in January.
The level of Lakes Michigan-Huron is now about 33 cm (13 inches) below its long-term average beginning-of-February level, but is six cm (two inches) higher than a year ago.
Source: U.S. Army Corps of Engineers
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