Day 1 Outlook UPDATE — Sunday, September 13, 2026 · 1630Z · Slight Risk Northeast (SITE-X landscape). SPC upgraded the upper Ohio Valley into the Northeast corridor from morning Marginal to categorical Slight. Damaging wind is the primary threat as clusters/bows organize along a cold front this afternoon through early evening; marginal/isolated hail possible with the strongest cells. Isolated High Plains storms remain a secondary corridor.

Corridor / towns: Cincinnati · Columbus · Akron · Youngstown · Pittsburgh · Erie · Harrisburg · Binghamton · Scranton · Albany · Hartford · Boston — plus High Plains watch towns Cheyenne · Scottsbluff · Rapid City.

Watching (not ALERT): No Day 4–8 severe areas drawn. Soft signal only — Wednesday focus OH into the lower Missouri Valley.

Archive graphic for the HailDataHub phone scroller. Same-day refreshes post as separate cards so the year-scale timeline stays readable (morning Marginal card unchanged).

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