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Atlantic Tropical Weather Outlook

2021-09-11 19:33:09| National Hurricane Center (Atlantic)

000 ABNT20 KNHC 111733 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 200 PM EDT Sat Sep 11 2021 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The National Hurricane Center has issued the last advisory on Post-Tropical Cyclone Larry, located over the Labrador Sea. A tropical wave and an upper-level trough continue to produce a large area of disorganized showers and thunderstorms over portions of southeastern Mexico and the southern and central Gulf of Mexico. Although upper-level winds are not conducive for development currently, they are expected to become more favorable for the system during the next day or so. A tropical depression is likely to form on Sunday or Monday while the disturbance moves northwestward and then northward near the coast of northeastern Mexico. Further development will be possible through the middle of next week if it remains over water, and interests along the western and northwestern Gulf coast should monitor the progress of this system. An Air Force Hurricane Hunter aircraft is scheduled to investigate the system tomorrow. Regardless of development, this disturbance is expected to produce heavy rain across portions of Central America and the Yucatan Peninsula through today which may lead to flash flooding and mudslides. By late this weekend, heavy rain will likely reach portions of the western Gulf coast, including coastal Texas and Louisiana through the middle of next week. Localized significant rainfall amounts will be possible, potentially resulting in areas of flash and urban flooding. * Formation chance through 48 hours...high...80 percent. * Formation chance through 5 days...high...90 percent. Showers and thunderstorms have not become any better organized in association with a tropical wave located just southeast of the Cabo Verde Islands. Environmental conditions appear generally conducive for gradual development, and a tropical depression is likely to form late this weekend or early next week while the system moves westward over the far eastern Atlantic. Regardless of development, this disturbance is likely to bring gusty winds and locally heavy rain across the Cabo Verde Islands later today and tonight. * Formation chance through 48 hours...medium...50 percent. * Formation chance through 5 days...high...70 percent. Another tropical wave is expected to move off the west coast of Africa in a few days. Some development of this system will be possible through the middle of next week while it moves westward across the eastern tropical Atlantic Ocean. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...low...20 percent. An area of low pressure is expected to form near the southeastern Bahamas in a few days. Gradual development of this system is possible thereafter as it moves northwestward across the western Atlantic. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...low...20 percent. $$ Forecaster Cangialosi

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