Well, the closest forecast I can get for wind for Grass Lake is McCollum Lake in McHenry, IL. They're calling for the following on WindFinder.com:
Time 00h ~ 03h ~ 06h ~ 09h ~ 12h ~ 15h ~ 18h ~ 21h
Wind speed (mph) 8 10 10 13 12 14 10 9
Wind gusts (mph) 15 20 22 21 16 18 18 15
but I can tell you it ain't blowing 13 right now, it's more like 5-10, and less at times, almost calm.
Unless it picks up later today, I won't be going... let's hope for better tomorro!!!!