Issued at 1100 AM AST Mon Sep 28 2026
000 WTNT43 KNHC 281500 TCDAT3 Tropical Storm Hanna Discussion Number 1 NWS National Hurricane Center Miami FL AL082026 1100 AM AST Mon Sep 28 2026 Recent scatterometer data shows that the disturbance that NHC has been tracking over the central subtropical Atlantic has acquired a well-defined surface circulation and center. Despite significant westerly shear the system has maintained an area of deep convection to the east of the center, and the scatterometer data revealed peak winds of 35 to 40 kt to the southeast of the center. As a result of this data, the system is being upgraded to 40-kt tropical storm Hanna at this time. The shear over the tropical storm is expected to remain strong out of the west-northwest for the next several days, so little, if any, strengthening is anticipated. In a couple of days, the shear and dry mid-level air are likely to cause weakening. Simulated satellite imagery from the global models indicated the deep convection is likely to cease in about 60 hours, therefore the NHC forecast calls for it to become a remnant low at that time. Hanna is moving eastward at about 15 kt. An eastward to east-southeastward motion is forecast during the next 24 hours as the system is embedded along the southern side of the mid-latitude westerlies. After that time, the westerlies lift northward and the steering flow will weaken, causing the system to slow down and turn east-northeastward. The NHC track forecast is close to the HCCA and GDMI models which are along the southern side of the model envelope. FORECAST POSITIONS AND MAX WINDS INIT 28/1500Z 36.6N 50.4W 40 KT 45 MPH 12H 29/0000Z 36.1N 47.7W 40 KT 45 MPH 24H 29/1200Z 34.8N 45.1W 40 KT 45 MPH 36H 30/0000Z 33.9N 43.8W 40 KT 45 MPH 48H 30/1200Z 33.9N 43.3W 35 KT 40 MPH 60H 01/0000Z 34.4N 42.4W 30 KT 35 MPH...POST-TROP/REMNT LOW 72H 01/1200Z 35.3N 40.7W 25 KT 30 MPH...POST-TROP/REMNT LOW 96H 02/1200Z...DISSIPATED $$ Forecaster Brown
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