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NHC Unveils New Hurricane Forecast Maps for 2024, Exhibiting Extra Inland Warnings



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The acquainted “cone of uncertainty” map, used for years by meteorologists to point out a hurricane’s predicted path, is about to get an improve – no less than briefly, the Nationwide Hurricane Middle introduced this week.


Beginning Aug. 15, simply after the beginning of hurricane season this 12 months, the NHC will roll out an experimental cone graphic designed to point out inland storm watches and areas that may very well be affected, together with these outdoors of the storm’s direct path. The change seems to be on account of years of questions from residents who might have relied too closely on the cone map, solely to be caught by storm surge and excessive winds.

“Suggestions from social science analysis recommend that the addition of inland watches and warnings to the cone graphic will assist talk inland wind threat throughout tropical cyclone occasions whereas not overcomplicating the present model of the graphic with too many knowledge layers,” the NHC stated in a bulletin on its website.

The NHC’s precise cone of uncertainty graphic launched forward of Hurricane Ian in September 2022, displaying solely coastal warnings.

Stakeholders can have an opportunity to offer suggestions through the experimental part, the middle famous.

Beforehand, the cone graphic posted by the NHC as a hurricane or tropical storm approached the U.S. confirmed solely watches and warnings alongside the shoreline. However Hurricane Ian in September and October 2022 left a large swath of destruction, largely on account of inland flooding, by means of a lot of Florida and Georgia.

The brand new maps will present extra affected inland areas. The cone additionally will probably be shaded clear, not white, for the whole 5-day forecast for the storm, emphasizing the warning areas greater than the trail of the tempest.


“A latest unpublished research of different cone variations discovered that the inclusion of inland wind threat info on the cone graphic decreased deal with the storm observe and elevated deal with wind hazard info in comparison with the variations of the cone with out inland watches and warnings,” the NHC defined.

The change is a part of a 20-year evolution within the hurricane middle’s forecasting maps. The cone of uncertainty has steadily narrowed over time as the middle recalculates the cone based mostly on monitoring errors from earlier storms, the Miami Herald reported.


The newspaper additionally famous that the middle this 12 months will produce extra storm advisories in Spanish.

Prime graphic: An instance of how Hurricane Ian’s cone map would have appeared below the 2024 plan. (Nationwide Hurricane Middle)


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