All five of the Great Lakes have pushed well into record-warm territory for this time of year (black lines below). For full-size graphics, see "Average GLSEA Surface Water Temperature Graphs" here: https://t.co/NenYYn878q

More on the record autumn temps:https://t.co/cYiwHGpFqx pic.twitter.com/yXV00Iqk1X

— Bob Henson (@bhensonweather) October 18, 2021