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Atlantic Tropical Weather Outlook
2021-09-29 01:44:03| National Hurricane Center (Atlantic)
000 ABNT20 KNHC 282343 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 800 PM EDT Tue Sep 28 2021 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The National Hurricane Center is issuing advisories on Hurricane Sam, located several hundred miles east of the northern Leeward Islands. Recent satellite-derived surface wind data indicate that the low pressure system located over the far eastern tropical Atlantic several hundred miles south of the Cabo Verde Islands is gradually becoming better defined. The associated showers and thunderstorms are showing signs of organization, and a tropical depression is expected to form during the next day or so while the disturbance moves west-northwestward at 10 to 15 mph over the eastern tropical Atlantic. * Formation chance through 48 hours...high...90 percent. * Formation chance through 5 days...high...90 percent. Showers and thunderstorms remain disorganized in association with a a broad area of low pressure located several hundred miles southwest of the Cabo Verde Islands. Environmental conditions are conducive for gradual development, and a tropical depression could still form during the next couple of days if the disturbance does not get absorbed into the stronger low pressure system located to its east. The broad low is expected to move slowly west-northwestward to westward over the central tropical Atlantic during the next few days. * Formation chance through 48 hours...medium...60 percent. * Formation chance through 5 days...medium...60 percent. A well-defined low pressure area associated with the remnants of Peter is located several hundred miles east-northeast of Bermuda. The associated shower and thunderstorm activity remains limited, and the chances of this system becoming a short-lived tropical depression or storm appear to be decreasing. This system is expected to move northeastward at about 10 mph into a region of very strong upper-level winds on Wednesday. Additional information on this system can be found in High Seas Forecasts issued by the National Weather Service. * Formation chance through 48 hours...low...30 percent. * Formation chance through 5 days...low...30 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 $$ Forecaster Stewart
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