Milton — 2024

A tropical depression formed in the southwestern Gulf of Mexico on 5 October 2024 about 135 nautical miles east of Tampico, Mexico, from a complex interaction of tropical waves and a low-level trough. The system became Tropical Storm Milton later that day, turned north then east across the central Gulf, and strengthened into a hurricane on 6 October. Milton underwent explosive intensification on 7 October while moving east-southeastward, briefly reached peak strength on 7 October, then fluctuated in intensity through eyewall cycles before accelerating northeastward and weakening as it approached Florida. The center crossed the Florida peninsula and became an extratropical low over the western Atlantic on 10 October, dissipating by 12 October south of Bermuda. Milton made its U.S. landfall on Siesta Key, Florida, at about 00:30 UTC on 10 October 2024. Landfall intensity is estimated at 100 kt (115 mph), with a minimum central pressure near 958 mb, corresponding to a Category 3 hurricane at the coast. Before reaching Florida, Milton remained offshore of the northwestern Yucatan Peninsula, bringing tropical-storm conditions there but no hurricane-force landfall in Mexico. Milton’s maximum intensity occurred on 7 October 2024, when aircraft and satellite data indicate peak sustained winds of 155 kt (179 mph) and an estimated minimum central pressure near 895 mb. That pressure ties Milton with Hurricane Rita (2005) for the fourth-lowest central pressure observed in an Atlantic hurricane. The peak corresponded to Category 5 strength on the Saffir–Simpson scale, although the absolute peak is somewhat uncertain because it occurred between aircraft missions. The storm produced very large storm surge along Florida’s central and southwest Gulf coast. Measured and surveyed inundation reached 6–9 ft above ground level from Venice southward to Boca Grande, with an isolated peak estimated up to 10 ft AGL at Manasota Key; a USGS sensor near the Venice Fishing Pier recorded about 6.74 ft above mean higher high water, and significant coastal erosion and a new inlet (“Milton Pass”) were documented. Charlotte Harbor and the Peace River saw 5–8 ft inundation (a Shell Creek gauge near Punta Gorda measured 8.86 ft on a datum other than MHHW). Near landfall, inundation of 4–6 ft occurred from Longboat Key to Venice and US gauges showed ~5.27 ft above MHHW at Fort Myers and ~5.04 ft above MHHW on Longboat Key. Heavy rain swathes affected central and northern Florida: storm totals included 20.40 inches near St. Petersburg, 17.20 inches near Ormond Beach, 14.83 inches near Orlando, and 11.60 inches near Vero Beach, producing widespread urban and river flooding and record crests on the Hillsborough River. Milton caused significant loss of life and damage. The report documents 15 direct deaths (12 in the United States—all in Florida—and 3 in Mexico) and 27 indirect deaths in the United States (all in Florida). In Florida, direct fatalities included six people killed by an EF‑3 tornado near Fort Pierce and Vero Beach, four deaths from falling trees, and two from freshwater flooding; Mexico’s direct deaths included two from high surf. Economic damages in the U.S. are estimated at about $34.3 billion, concentrated almost entirely in Florida; notable structural damage included the fabric roof of Tropicana Field in St. Petersburg being ripped off. The hardest-hit areas on Florida’s west coast had also been impacted by Hurricane Helene two weeks earlier, complicating recovery and damage assessments. Noteworthy aspects include Milton’s unusual eastward track across the Gulf of Mexico and its extremely rapid intensification to an estimated Category 5 with a pressure below 900 mb—rare in the Atlantic—with a best-estimate minimum pressure of 895 mb. Forecasting challenges included poor early prediction of where and when the storm would form and substantial underestimation of the rapid intensification; however, official track forecasts did consistently indicate a major-hurricane threat to the Sarasota/Tampa Bay area. Milton also produced an unusually large tornado outbreak in Florida on 9 October (45 known tornadoes, including three EF‑3s), the first tropical cyclone on record to produce more than one EF‑3 tornado in the Storm Prediction Center’s database.