The American South — fifteen advisories, and records challenged this weekend
BUILDING · September 17, 2026 · NO. 0917
THE DOME
0 Extreme Heat Warnings above 15 Heat Advisories, up from 12, across Oklahoma, Arkansas, Tennessee, Illinois, Missouri, Indiana, Kentucky and Alabama, with heat index 105 to 109 °F — and records challenged in the South this weekend as the Southwest's disturbance diffuses. The acute tier is empty and the advisory tier is the one that reaches outdoor workers.
THE RECORD
51 turning points on record since Jun 9 — the 8 most recent shown.
Sep 16▽ slipped down the board
Sep 15▽ eased
Sep 13easing → active
Sep 12↑ moved up the board
Sep 11building → easing · eased sharply
Sep 8easing → building
Aug 28▽ slipped down the board
Aug 27building → easing · eased sharply
WHO IT TOUCHES
Aviationa holiday-weekend flight bank into Tokyo, a flooded Southwest hub pair today, and an easy day everywhere else
Events and venuesa national holiday weekend in the path of a storm, and outdoor crowds under heat records at the other end of the board
Healthfloodwater reaching dense settlement on four continents, three deaths already, and a heat tier that reaches outdoor workers
Agricultureharvest and livestock decisions on five continents, and one of them can be read off a published schedule
Energycooling load in one hemisphere, heating load in the other, and a hydropower release running to a published plan
CONNECTED
The same ground runs flood to heat inside a week — a Moderate excessive-rain risk over Arizona and New Mexico today, the disturbance diffusing into the weekend, and records challenged across the South behind it as advisories go 12 to 15.
THE ATMOSPHERE TODAY · EVENT← TODAY'S COVER