{"id": "1214243823622356999", "title": "Tropical Cyclone Discussion", "adv_date": "2026-09-28T21:00:00Z", "msg": "095\nWTNT43 KNHC 282043\nTCDAT3\n \nTropical Storm Hanna Discussion Number   2\nNWS National Hurricane Center Miami FL       AL082026\n500 PM AST Mon Sep 28 2026\n \nSince this morning, Hanna's convective structure has become a little \nmore disheveled with the tropical storm is affected by 20-25 kt of \nwesterly vertical wind shear. There has not been an appreciable \nchange in the subjective or objective intensity estimates this \nafternoon, and the initial intensity is held at 40 kt.\n\nThe initial motion of Hanna is east-southeastward at 115 degrees at \n15 kt. Hanna is embedded in the flow in between a longwave trough to \nits northeast, and a larger subtropical ridge to its south. This \nsynoptic pattern should result in a continued east-southeastward \nmotion over the next 24-36 hours with some gradually slow down in \nthe track as the mid-latitude trough leaves Hanna behind. Much of \nthe track guidance then shows a slow east-northeastward motion \nafter the cyclone becomes more vertically shallow and becomes \ninfluenced by a low-level ridge centered south of the Azores. The \nNHC track forecast is very similar to the previous one, roughly in \nbetween the simple (TVCN) and corrected consensus (HCCA) aids.\n\nVertical wind shear over Hanna is expected to persist in over the \nnext 48-72 h, though because the tropical storm is currently moving \nin the same direction as the shear vector, bursts of deep convection \ndown-shear of the center may allow for some slight intensification, \nwhich is reflected in the HCCA intensity guidance. However, when \nHanna slows down and turned more east-northeastward, the shear is \nexpected to shift more out of the north, importing very dry \ntropospheric air into the circulation. Simulated satellite imagery \nfrom the ECMWF and hurricane-regional models still show convection \nceasing over the storm in around 60 h, marking its transition to a \npost-tropical cyclone in the forecast. \n \n \nFORECAST POSITIONS AND MAX WINDS\n \nINIT  28/2100Z 36.5N  48.7W   40 KT  45 MPH\n 12H  29/0600Z 35.5N  46.1W   45 KT  50 MPH\n 24H  29/1800Z 34.3N  44.3W   45 KT  50 MPH\n 36H  30/0600Z 33.9N  43.4W   40 KT  45 MPH\n 48H  30/1800Z 34.2N  42.5W   35 KT  40 MPH\n 60H  01/0600Z 34.8N  41.0W   30 KT  35 MPH...POST-TROP/REMNT LOW\n 72H  01/1800Z 36.0N  38.6W   30 KT  35 MPH...POST-TROP/REMNT LOW\n 96H  02/1800Z...DISSIPATED\n \n"}