{"id": "1214314702213382151", "title": "Tropical Cyclone Discussion", "adv_date": "2026-09-29T03:00:00Z", "msg": "879\nWTNT43 KNHC 290243\nTCDAT3\n \nTropical Storm Hanna Discussion Number   3\nNWS National Hurricane Center Miami FL       AL082026\n1100 PM AST Mon Sep 28 2026\n \nSatellite imagery shows Hanna's convective structure remains \nhighly sheared with an exposed center. The deepest convection \nremains displaced to the east of the tropical storm's center due to \nstrong westerly vertical wind shear. Subjective Dvorak estimates \nfrom TAFB came in at T2.0/30 kt, slightly below objective estimates \nranging between 35 and 50 kt. Based on a blend of these data, the \ninitial intensity is held at 40 kt.\n \nThe initial motion continues east-southeastward at 105/12 kt. Hanna \nis embedded in the flow between a longwave trough to its northeast \nand a larger subtropical ridge to its south. This synoptic pattern \nshould result in a continued east-southeastward motion over the next \n24\u201336 hours with a gradual slowdown in the track as the mid-latitude \ntrough leaves Hanna behind. Much of the track guidance then shows a \nslow east-northeastward motion after the cyclone becomes vertically \nshallow and influenced by a low-level ridge centered south of the \nAzores. The updated NHC track forecast is a blend of the previous \nadvisory and the corrected consensus (HCCA) aid, nudging the track \nslightly southward.\n\nHanna is expected to remain in a hostile environment, with moderate \nto strong vertical wind shear prevailing over the next 48\u201372 h. \nHowever, because the tropical storm is generally moving in the same \ndirection as the shear vector, deeper convection well east of the \ncenter may allow for slight intensification, as portrayed in some \nreliable guidance. SHIPS guidance indicates that vertical wind shear \nwill only increase throughout the forecast period, while mid-level \nRH values show the storm being starved of moisture, which may weaken \nthe system. Hanna is expected to be devoid of deep convection around \nthe 60 h mark, degenerating into a post-tropical cyclone at that \ntime.\n \nFORECAST POSITIONS AND MAX WINDS\n \nINIT  29/0300Z 36.0N  47.7W   40 KT  45 MPH\n 12H  29/1200Z 34.9N  45.7W   45 KT  50 MPH\n 24H  30/0000Z 34.1N  44.3W   45 KT  50 MPH\n 36H  30/1200Z 34.0N  43.5W   40 KT  45 MPH\n 48H  01/0000Z 34.4N  42.2W   35 KT  40 MPH\n 60H  01/1200Z 35.2N  40.3W   30 KT  35 MPH...POST-TROP/REMNT LOW\n 72H  02/0000Z 36.3N  38.1W   30 KT  35 MPH...POST-TROP/REMNT LOW\n 96H  03/0000Z...DISSIPATED\n \n"}