AIR MAIL
Where today’s air came from
The air arriving over Neshkoro about 5,000 feet above the ground was over a point about 260 miles to the southwest three days ago, and over the Great Lakes a day ago, about 710 miles back along its path. Most of the nine paths traced from around the city agree. Near the ground the air came from the Great Lakes; at 10,000 feet, from a point about 250 miles to the southwest. Traced back 72 hours through NOAA’s hourly RAP analyses, nine paths at each of three heights.