An overall drier than average pattern has brought Great Lakes water levels back down a touch closer to average levels.
Lake Superior is down 3″ in the last month. The cold pattern has brought snow, not rain to the Lake Superior area. When that melts, the lake level will go up. Hopefully, that won’t be accompanied by heavy rain, which would have the potential to produce significant flooding. Superior is 4″ higher than one year ago and 9″ higher than the average April level.
Lake Michigan/Huron is down 1″ in the last month, up 6″ year-to-year and is now 14″ higher than the April average.
Lake Erie is up 2″ in the last month — the only Great Lakes to see a rise over the past 30 days. Erie is 4″ higher than one year ago and 19″ above the April average.
Lake Ontario is down one inch in the last month and down 10″ since April 2017 Ontario is only 2″ above the April average.
All the Great Lakes connecting rivers have above average flow and that will continue to be the case into the summer.
Great Lakes ice extent is down to 12.6%, with much of the remaining ice in Lake Superior. Water temperatures of the Great Lakes range from the mid 30s to the low 40s. The water temperature of inland Reeds Lake in East Grand Rapids is 41°.
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