First of all, the meteorological data used in our models are not "fine"
enough to distinguish the difference between two locations in the city of
Chicago. The ARL archive dataset that has the best resolution in that region
is the EDAS archive, which was saved at a horizontal resolution of about 80 km (prior
to January 2004, thereafter it is 40 km). So, anything that you are trying to
resolve less than 80 km (or 40 km) apart is not feasable with our system. To find the
latitude/longitude for your location just look
in an atlas for the city of Chicago and find the latitude and longitude lines
that intersect that area, or choose the nearest National Weather Service
Station, which is probably Chicago Ohare (ORD) and enter it on the HYSPLIT
input page.