Tropical Weather Outlook: 3 areas being monitored, up to 90% development odds

en Español 695 ABNT20 KNHC 212335 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 800 PM EDT Mon Sep 21 2026 For the North Atlantic...Caribbean Sea and the Gulf of America: Active Systems: The National Hurricane Center is issuing advisories on Tropical Storm Fay, located several hundred miles southwest of the Azores. Far Eastern Tropical Atlantic: A tropical wave is forecast to move off western Africa by Wednesday. Environmental conditions may become marginally conducive for slow development while it moves generally north-northwestward near the Cabo Verde Islands later this week. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 7 days...low...30 percent. $$ Forecaster Adams

en Español 000 ABPZ20 KNHC 211756 TWOEP Tropical Weather Outlook NWS National Hurricane Center Miami FL 1100 AM PDT Mon Sep 21 2026 For the eastern and central North Pacific east of 180 longitude: Active Systems: The National Hurricane Center is issuing advisories on Tropical Storm Odalys, located located well west-southwest of the southern tip of Baja California, and on recently upgraded Hurricane Polo, located a few hundred miles south of Manzanillo, Mexico. East-Southeast of the Hawaiian Islands (Former TD 15-E): Satellite-wind data indicate the low-level circulation of the remnants of Tropical Depression Fifteen-E has become better defined, located several hundred miles to the east-southeast of the Hawaiian Islands. Environmental conditions are forecast to become conducive for further development, and a tropical depression is likely to form around midweek while it moves slowly west- northwestward or northwestward. Interests in the Hawaiian Islands should monitor the progress of this system. * Formation chance through 48 hours...medium...40 percent. * Formation chance through 7 days...high...90 percent. South of the Gulf of Tehuantepec: An area of low pressure could form in a few days to the south of the Gulf of Tehuantepec. Thereafter, environmental conditions appear favorable for gradual development, and a tropical depression could form late this week or this weekend while the system moves slowly west-northwestward to northwestward, parallel to the coast of southern and southwestern Mexico. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 7 days...medium...50 percent. && Public Advisories on Polo are issued under WMO header WTPZ32 KNHC and under AWIPS header MIATCPEP2. Forecast/Advisories on Polo are issued under WMO header WTPZ22 KNHC and under AWIPS header MIATCMEP2. $$ Forecaster Blake