Heavy rain and flash flooding are greatest across the Midwest, Ohio Valley and Great Lakes today, expanding into the Mid-Atlantic and North-east on Sunday, with a separate concentrated heavy-rain threat over Montana and isolated flash flooding over south Florida. The rain this page tracked across the northern tier marched east on schedule. The national alerts board reads 362 active, but 294 of those are marine — the land count is 68, and an aggregate that size hides which hazard actually moved.
THE RECORD
33 turning points on record since Jul 18 — the 8 most recent shown.
Sep 18cresting → building
Sep 17building → cresting · intensified sharply
Sep 16↑ moved up the board
Sep 15active → building
Sep 13↑ firmed
Sep 12▽ slipped down the board
Sep 11building → active
Sep 8easing → building
WHO IT TOUCHES
Public safetythree warning systems arriving on three different clocks, and two more that just told the public to un-believe something
Aviationa typhoon reaching the Tokyo area on a holiday Monday, a hail day over the central Plains, and a rain axis crossing the north-eastern hubs
Supply chainsthe Kanto corridor under a Monday arrival, the Great-Lakes freight lanes under the weekend rain, and two Vietnamese logistics regions flooded at once
Maritimea typhoon crossing island ferry routes, an extratropical cyclone on a South American coast, and a marine alert count that is carrying most of an American board
Eventsa national holiday weekend under a typhoon's rain, and an American Saturday with hail in the Plains and a record-challenging heat index in the South
CONNECTED
The heavy-rain axis and the eastern half of the severe outlook are drawn over the same counties — the Ohio Valley sits under both the weekend's flash-flood focus and the Marginal tier for damaging wind and isolated hail.
THE ATMOSPHERE TODAY · EVENT← TODAY'S COVER