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| #1279535 (Received by flhurricane at: 11:00 AM 21.Sep.2026) TCDAT1 Tropical Storm Fay Discussion Number 9 NWS National Hurricane Center Miami FL AL062026 300 PM GMT Mon Sep 21 2026 Fay continues to be affected by strong west-northwesterly vertical wind shear. Practically all of the deep convection is confined to a band of showers and thunderstorms located well to the east of the well-defined low-level center. Using a blend of subjective and objective intensity estimates, the advisory intensity is reduced to 45 kt. Global model simulations show a strong upper-level trough shifting eastward from Fay during the next day or two. This evolution would allow for some relaxation of the shear, and this is also indicated by the Decay SHIPS model. However, the model guidance also indicates that the system is likely to encounter a drier low- to mid-level air mass, which should inhibit re-strengthening. Simulated satellite imagery from the ECMWF output shows Fay`s deep convection mostly dissipated during the next few days. Therefore the official forecast, like the previous one, shows the cyclone degenerating into a remnant low by 48 hours. Fay is now moving southward at around 4 kt, along the eastern side of a mid-level high. Over the next several days, the cyclone is expected turn southwestward to west-southwestward and move around the southeastern and southern periphery of the high. This should keep the system over the open Atlantic through dissipation later in the week. Not much change has been made to the previous NHC track forecast, which remains in good agreement with the Google DeepMind ensemble mean and corrected model consensus, HCCA. FORECAST POSITIONS AND MAX WINDS INIT 21/1500Z 33.3N 32.0W 45 KT 50 MPH 12H 22/0000Z 32.6N 32.5W 40 KT 45 MPH 24H 22/1200Z 31.6N 33.9W 40 KT 45 MPH 36H 23/0000Z 30.7N 35.6W 35 KT 40 MPH 48H 23/1200Z 30.0N 37.4W 30 KT 35 MPH...POST-TROP/REMNT LOW 60H 24/0000Z 29.4N 39.2W 30 KT 35 MPH...POST-TROP/REMNT LOW 72H 24/1200Z 29.3N 40.5W 25 KT 30 MPH...POST-TROP/REMNT LOW 96H 25/1200Z 29.3N 43.1W 25 KT 30 MPH...POST-TROP/REMNT LOW 120H 26/1200Z...DISSIPATED $$ Forecaster Pasch |
