AIR MAIL
Where today’s air came from
The air arriving over East Lake Lillian about 5,000 feet above the ground was over the Gulf Coast three days ago, and over Texas a day ago, about 1,220 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 southern Rockies. Air off the water carries moisture, which is why it feels humid. Traced back 72 hours through NOAA’s hourly RAP analyses, nine paths at each of three heights.