AIR MAIL
Where today’s air came from
The air arriving over East Park about 5,000 feet above the ground was over the central Plains three days ago, and over the northern Plains a day ago, about 1,230 miles back along its path. The nine paths traced from around the city fan out, so treat that as a best guess. Near the ground the air came from Texas; at 10,000 feet, from southern California. It feels humid. Traced back 72 hours through NOAA’s hourly RAP analyses, nine paths at each of three heights.