047 ABNT20 KNHC 100516 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 200 AM EDT Mon Sep 10 2018 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The National Hurricane Center is issuing advisories on Hurricane Florence, located over the west-central Atlantic Ocean, on Hurricane Helene, located over the eastern Atlantic, and on recently upgraded Hurricane Isaac, located over the central tropical Atlantic. Disorganized showers and thunderstorms over the northwestern Caribbean Sea are associated with a tropical wave and an upper-level trough. The disturbance is forecast to move slowly west-northwestward to northwestward across the northwestern Caribbean Sea and the Yucatan peninsula during the next couple of days with little or no development expected during that time. However, upper-level winds are forecast to become a little more conducive for development when the system moves across the western Gulf of Mexico Wednesday through Friday. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...low...30 percent. A non-tropical area of low pressure is forecast to form in the northeastern Atlantic Ocean several hundred miles west-southwest of the Azores in two or three days. Some slow tropical or subtropical development is possible by the end of the week while the low moves southwestward. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...medium...40 percent. $$ Forecaster Cangialosi