Today, the northern three-quarters of the state are experiencing moderately heavy to heavy levels of avian movement with the first noteworthy southerly winds in a few days. The southern quarter of the state appears to be quieter tonight. It would be a good idea to check lakefront locations tomorrow (I'll be at Montrose!), because the winds in northeast Illinois are out of the south to the southwest tonight, meaning that in addition to a tailwind, the birds will also be "funnelled" along the Lake Michigan shoreline by the westerly component to the winds because the birds don't want to fly over the lake.
Henry Griffin (Oak Park, Cook County)