AIR MAIL
Where today’s air came from
The air arriving over Browns Valley about 5,000 feet above the ground was over the Mojave Desert three days ago, and over the northern Plains a day ago, about 1,220 miles back along its path. Most of the nine paths traced from around the city agree. It rose from near the ground on the way. Near the ground the air came from the Ozarks; at 10,000 feet, from the desert Southwest. It feels humid. Traced back 72 hours through NOAA’s hourly RAP analyses, nine paths at each of three heights.