AIR MAIL
Where today’s air came from
The air arriving over Swede Prairie about 5,000 feet above the ground was over a point about 780 miles to the south three days ago, and over Texas a day ago, about 1,020 miles back along its path. Most of the nine paths traced from around the city agree. Near the ground the air came from the Ozarks; at 10,000 feet, from the central Plains. It feels humid. Traced back 72 hours through NOAA’s hourly RAP analyses, nine paths at each of three heights.