Might make it easier to understand hurricane risks
![]() |
| Figure 1. A comparison of the original forecast cone for Hurricane Milton issued at 4 a.m. CDT October 8, 2024 (left) and how the same forecast would look in the revised cone graphic being used this year (right). The area crosshatched in blue and pink lines is under both a hurricane watch (pink) and a tropical storm warning (blue). The revised cone graphic will also use gray shading for the entire length of the cone, rather than for only the first three days of the five-day forecast period. (Image credit: NOAA/NWS/NHC) |
It might have seemed exotic when it first appeared, but the forecast “cone of uncertainty” used by the NOAA/NWS National Hurricane Center (NHC) is now a familiar part of tropical cyclone readiness in U.S. states and territories. For 2026, NHC has made a couple of key tweaks to its standard cone product. It’s also testing an expanded version of the cone – one made feasible by a new way of understanding how and where forecast errors arise.
Since its debut in 2002, the cone has become what a University of Miami writer called “arguably [the center’s] most iconic graphic,” a mainstay of TV coverage and weather apps. Prior to the cone, hurricane maps simply showed a line depicting the official multi-day forecast for the storm center, as issued every six hours by NHC. Experts urged the public not to “focus on the skinny line,” keeping in mind that a hurricane’s path can easily deviate from the forecast track and that impacts will typically extend far beyond that center.
When you see a cone graphic, that 'skinny line' may or may not appear (NHC provides both versions), but the cone itself has gone a long way to fix the skinny-line problem.
However, just as a hurricane's impacts do not just lie along a narrow line, a hurricane’s damage doesn’t stop when it comes ashore. Some of the worst U.S. hurricane disasters in recent years have occurred well inland, including billions of dollars in wind-driven destruction across Georgia in 2018’s Michael, and the catastrophic, deadly flooding from 2024’s Helene, which killed more than 100 people in and around western North Carolina.






.webp)





.webp)

