A storm outside the formal season would puncture the idea that the calendar shuts down risk.
What is known.
The National Hurricane Center reported no active Atlantic tropical cyclone on 15 October, but the season and its official storm archive continue.
The question in this article is narrower than the general hazard: YES only if the NHC Atlantic best-track archive, available by 31 January 2027, lists a tropical depression or stronger cyclone first forming from 1 through 31 December 2026 UTC. The source documents what was known at publication, not proof that the forecast has come true.
What earlier cases show.
The current reference point comes from NOAA National Hurricane Center's published record. Forecasts of disasters can fail because a risk signal is not a local outcome, and because official reporting and verification can lag real-world events.
Why it is a possibility.
Exceptionally warm seas can sometimes support formation after November.
December development is rare and hostile wind shear often ends tropical organization.
How the 13% was assessed.
Reference point. The published 13% is an editorial judgment from the NOAA National Hurricane Center evidence available on 15 October 2026, not a measured frequency for this exact event.
Why it could be higher. Exceptionally warm seas can sometimes support formation after November.
Why it could be lower. December development is rare and hostile wind shear often ends tropical organization.
The editorial judgment. A 13% point estimate allows the defined event a real possibility by 2027-01-31 while respecting the countercase. The probability is frozen at publication for scoring.
Limits of the estimate. Official data can be delayed or revised, and a broad regional warning does not settle a specific event. The original rule and deadline control the result; a later evidence update may change the displayed current estimate without rewriting this article.
What could prevent it.
December development is rare and hostile wind shear often ends tropical organization.
How it will be assessed.
YES only if the NHC Atlantic best-track archive, available by 31 January 2027, lists a tropical depression or stronger cyclone first forming from 1 through 31 December 2026 UTC.
Sources and primary records
Probabilities are provisional editorial estimates, not guarantees. Sources document the present evidence and resolution rule. Read the full disclaimer.