Atlantic Tropical Weather Outlook
976 ABNT20 KNHC 211937 TWOAT Special Tropical Weather Outlook NWS National Hurricane Center Miami FL 340 PM EDT Wed Oct 21 2026 For the North Atlantic...Caribbean Sea and the Gulf of America: Special Outlook issued to raise formation probabilities for AL93 Offshore of the East Coast of the United States (AL93): Updated: Shower and thunderstorm activity has become better organized in association with a storm-force low pressure area located a few hundred miles off the mid-Atlantic United States coast. The system has continued to acquire subtropical characteristics today and has become separated from fronts. If these trends continue, a subtropical storm could form later this afternoon or tonight while it accelerates northeastward. Regardless of the status of the system, high winds, coastal flooding, and dangerous surf are expected along portions of the U.S. East Coast during the next few days. For more information, including hurricane-force extratropical wind warnings, please consult statements and warnings from local National Weather Service offices and the Weather Prediction Center, along with the High Seas Forecasts and the Storm Warnings issued by the National Weather Service. * Formation chance through 48 hours...high...70 percent. * Formation chance through 7 days...high...70 percent. Subtropical Central Atlantic: A trough of low pressure located several hundred miles east-southeast of Bermuda is producing a large area of disorganized showers and thunderstorms. Some development of this system is possible during the next day or two while it moves slowly north-northeastward. Upper-level winds are forecast to become too strong for further development by the weekend. * Formation chance through 48 hours...low...10 percent. * Formation chance through 7 days...low...10 percent. && High Seas Forecasts issued by the National Weather Service can be found under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php