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Will a nor'easter cause severe flooding in the Northeast US by 9 October 2026?

probability 81% deadline 2026-10-09 (13d left) Environment

Posted 2026-09-25 — 14 days before the deadline, stated before the outcome.

Nor'easters are extratropical cyclones that develop along the East Coast of North America, often bringing heavy precipitation and strong winds. These weather systems can lead to significant flooding in coastal and inland areas of the Northeastern United States.

The claim

The nor'easter will bring severe flooding to parts of the Northeast US within the next 14 days

Reasoning trace

  1. Explicit forecasts of 'more flooding' and 'damaging winds' from major news outlets
  2. Cancellation of major events in New England specifically due to 'severe weather warnings'
  3. Simultaneous pressure systems (Nolo and Polo) potentially influencing atmospheric dynamics

Evidence so far

6 confirming · 0 denying signals · 1 verified · 0 broken assumptions. The evidence itself is part of the full dossier.

Probability history

Updated 2 times since mint (last on 2026-09-26) — 80% at mint → 81% today.

What to watch

  • leading indicator The National Weather Service issues a Flood Watch for at least one county in the Northeast US
  • leading indicator USGS stream gauges in the Northeast US report water levels exceeding the 'Action' stage threshold
  • leading indicator USACE Northeast District publishes a public notice or advisory on its official website or social media channels regarding spillway operations or dam safety for a specific reservoir

The full dossier behind this prediction — the evidence trail, the risk analysis, the monetization scenarios — is available on request: [email protected].

Probabilities are calibrated against the system's own resolved history; after the deadline the outcome is resolved and audited — including the calls we get wrong. Nothing on this page is investment advice.