000 ABNT20 KNHC 272350 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 800 PM EDT Fri Oct 27 2017 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The National Hurricane Center is issuing advisories on Potential Tropical Cyclone Eighteen, located over the northwestern Caribbean Sea. * Formation chance through 48 hours...high...80 percent. * Formation chance through 5 days...high...80 percent. && Public Advisories on Potential Tropical Cyclone Eighteen are issued under WMO header WTNT33 KNHC and under AWIPS header MIATCPAT3. Forecast/Advisories on Potential Tropical Cyclone Eighteen are issued under WMO header WTNT23 KNHC and under AWIPS header MIATCMAT3. $$ Forecaster Beven