The Upper Midwest to the Northeast — the event that moved twice
BUILDING · September 16, 2026 · NO. 0916
THE WATER
A Slight, 15 percent excessive-rain risk now Friday Sep 18, expanding to the Great Lakes, Ohio Valley and Northeast over the weekend — a second consecutive one-day slip. Flood Watches rose 11 to 16 across nine states as the pre-staging.
THE RECORD
30 turning points on record since Jul 18 — the 8 most recent shown.
Sep 15active → building
Sep 13↑ firmed
Sep 12▽ slipped down the board
Sep 11building → active
Sep 8easing → building
Aug 28active → easing
Aug 27easing → active
Aug 24▽ slipped down the board
WHO IT TOUCHES
Public safetyseven national warning systems live at once, and only one of them has published the hour it begins
Supply chainsa dated release on an inland waterway, a delta corridor under water, and a river still too low to load
Agricultureharvest and livestock decisions on four continents, and one of them has a published start time
Aviationan easy day at the hubs, with the disruption booked for Friday and a crosswind ramp tomorrow
CONNECTED
Two forecast threads that will not close on schedule, on two hemispheres — South Africa's cut-off low has been called to ease twice and regenerated twice, and the American heavy-rain event has slipped three editions running to Friday.
The steady day is the planning day — heat holds at 12 advisories and severe holds at Marginal while the flood board pre-stages, Flood Watches 11 to 16, for a Friday that has already moved twice.
THE ATMOSPHERE TODAY · EVENT← TODAY'S COVER