A tropical wave currently located about 950 miles east of the Windward Islands is moving steadily westward. On satellite pictures, this system appears somewhat better organized today. There is a good chance this feature develops into a tropical system during the middle of this week. It is expected to track westward and affect the Windward Islands Wednesday into Thursday. Most of the computer modeling shows this becoming a strong tropical system over the Caribbean toward the end of next week. AccuWeather.com meteorologists will closely monitor this feature over the coming days.
Karl has transitioned to a powerful post-tropical cyclone over the North Atlantic. Karl is moving quickly to the northeast. It is about 1,000 miles west of London, England. It is becoming absorbed in a larger area of low pressure crossing the north Atlantic. The combined storm will track just north of the U.K. Tuesday and Tuesday night. It could bring locally damaging winds to the northern U.K. The highest threat for damaging winds will be across northern Scotland, where gusts to 60 mph can occur.
By AccuWeather Senior Meteorologist Brian Wimer
675 ABNT20 KNHC 262323 TWOAT TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 800 PM EDT MON SEP 26 2016 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: Showers and thunderstorms associated with a broad area of low pressure located about 700 miles east-southeast of the Windward Islands are gradually becoming better organized. Environmental conditions remain conducive for development, and a tropical depression is likely to form during the next day or two while the system moves westward to west-northwestward near 20 mph. Interests in the eastern and central Caribbean Sea, including the northern coast of South America, should monitor the progress of this system. Regardless of development, heavy rains and strong gusty winds, possibly to tropical storm force, are expected to spread over the Windward Islands and portions of the southern Lesser Antilles beginning late Tuesday or Wednesday. An Air Force Hurricane Hunter aircraft is scheduled to investigate this disturbance on Tuesday afternoon. * Formation chance through 48 hours...high...80 percent * Formation chance through 5 days...high...90 percent Some shower activity continues in association with the remnants of Lisa, located about 600 miles southwest of the Azores. This system is expected to merge with a cold front on Tuesday before regeneration into a tropical cyclone can occur. * Formation chance through 48 hours...low...10 percent * Formation chance through 5 days...low...10 percent Widespread cloudiness and thunderstorms over the southwestern Gulf of Mexico are associated with a trough of low pressure that is drifting westward. Upper-level winds are not expected to be conducive for significant development before this system moves inland over northeastern Mexico during the next day or so. * Formation chance through 48 hours...low...10 percent * Formation chance through 5 days...low...10 percent $$ Forecaster Pasch