Tomorrow.ioTomorrow.io THE ATMOSPHERE TODAY · EVENT← TODAY'S COVER
severe

AMERICAN SEVERE HOLDS A SLIGHT RISK — OKLAHOMA TODAY, THE APPALACHIANS TOMORROW

On the board · September 20, 2026 →
ACTIVE · September 20, 2026 · NO. 0920
THE RISK WINDOW

Same risk level, shifted west, moving east tomorrow. A SLIGHT risk covers parts of Oklahoma and from eastern Colorado into far western Kansas, with large hail and damaging wind the primary threats, plus isolated severe storms over the southern Plains and from the Ozarks into the Ohio Valley. The threat shifts into the central and southern Appalachians and the South-east on Monday.

THE RECORD

54 turning points on record since Jun 9 — the 8 most recent shown.

Sep 19↑ firmed
Sep 18↑ moved up the board
Sep 17▽ slipped down the board
Sep 16easing → active
Sep 15active → easing
Sep 13▽ slipped down the board
Sep 12▽ eased
Sep 11↑ firmed
WHO IT TOUCHES
Aviationa holiday Monday over the Tokyo airports, a hail day on the High Plains and a bura pulse on the Adriatic coast
Eventsa national holiday weekend under a rain shield, hail over outdoor operations, and a shrinking but real heat index
Agriculturea monsoon retreat you can plan a harvest against, a flood window over farmland, and one last freeze before spring
CONNECTED

One airmass retreating is the other's forecast — the hot core and the hail risk sit on opposite sides of the same boundary.