A slightly more "unsure" report tonight because all of my helpful migration links, including the national composite radar and the wind map, are oddly malfunctioning on my computer tonight. I hope it is better tomorrow!
So, that means a bit more guesswork than usual for tonight's report - for the northern half of Illinois, light northeasterly winds are dominating but with overcast skies, so I would predict only light migration for the northern half of the state tonight.
For the southern half, light northwesterly winds are present but under mostly clear to partly cloudy skies, so I would predict that there are moderate concentrations of birds moving over southern Illinois tonight.
Keep your eyes out for PINE SISKINS! Reports have been popping up over northern Illinois during the last few days and I even had five flyovers on an Oak Park Bird Walk this morning!
Hawk watching forecast: This will be a new October feature of the migration report specific to northeast Illinois because that is where Greene Valley, Fort Sheridan, and the IBSP Hawk Watches are located. Tomorrow should be a rather unfavorable day for raptor migration along the lakefront (so Fort Sheridan and IBSP) due to winds out of the northeast, pushing any raptors that would already be migrating there to more inland locations. Hawk watching may prove to be a bit better at the Greene Valley location tomorrow because of its inland orientation; however, it is still close to the lake in relative terms.
To predict which species you are likely to find and when, please consult:
BirdCast's regional migration forecast: http://birdcast.info/forecast/regional-migration-forecast-2-9-october-2015/#MidwestNortheast
eBird's species occurrence chart for Illinois: http://ebird.org/ebird/GuideMe?src=changeDate&getLocations=states&states=US-IL&parentState=US-IL&reportType=location&monthRadio=on&bMonth=08&eMonth=11&bYear=1900&eYear=2015&continue.x=63&continue.y=9&continue=Continue
Henry (Oak Park, Cook County)