{"id": "1217500103523827719", "title": "Tropical Cyclone Discussion", "adv_date": "2026-10-10T09:00:00Z", "msg": "730\nWTNT44 KNHC 100845\nTCDAT4\n \nPost-Tropical Cyclone Isaias Discussion Number  15\nNWS National Hurricane Center Miami FL       AL092026\n400 AM CDT Sat Oct 10 2026\n\nIsaias has very rapidly weakened over Alabama and has transitioned \ninto a post-tropical cyclone.  Satellite images show that all deep \nconvection has been scoured well northward away from the low-level \ncenter, with a warm front extending eastward from the former \ntropical cyclone.  Thus this is the last advisory on Isaias, with \nan initial intensity of 30 kt set from surface observations.  \n\nThe cyclone should move northward and north-northeastward this \nweekend and gradually weaken as it moves across the Tennessee and \nOhio Valleys.  No significant changes were made to the track or \nintensity forecasts, except lower wind speed on day 1.  Note there \nis still a risk of some high wind gusts over the southern \nAppalachians as the cyclone moves just to the west of those \nmountains, along with the potential for heavy rain causing flash \nfloods.\n\nThis is the last tropical cyclone discussion issued by the National \nHurricane Center on this system.  Future information on this system \ncan be found in discussions issued by the Weather Prediction Center \nbeginning at 1000 AM CDT, under AWIPS header TCDAT4, WMO header \nWTNT44 KWNH, and on the web at www.hurricanes.gov.\n\nRainfall forecasts for the United States are at:\nhttps://www.wpc.ncep.noaa.gov/qpf/qpf2.shtml \nand outlooks of flash flood risks can be found at \nhttps://www.wpc.ncep.noaa.gov/qpf/excessive_rainfall_outlook_ero.php\n \n \nKey Messages:\n \n1. Heavy rainfall associated with the post-tropical remnants of \nIsaias will be spreading quickly northward into the Tennessee \nValley, Southern Appalachians and Southeast today.  Considerable \nflash and urban flooding will be possible. Landslides are also \npossible across the Southern Appalachians.   Additional heavy rains \nare possible across portions of Northwest Florida and heavy rains \nare also possible across coastal Southwest Florida, resulting in \nflash and urban flooding.\n\n2. Post-storm safety:  Follow advice of local officials and avoid\nareas of downed power lines and flooding. Ensure generators are \nproperly ventilated and placed outside at least 20 feet away from \ndwellings and garages to avoid carbon monoxide poisoning. During \nclean up, be careful when using chainsaws and power tools. Drink \nplenty of water to avoid heat exhaustion.\n\n \nFORECAST POSITIONS AND MAX WINDS\n \nINIT  10/0900Z 32.0N  86.5W   30 KT  35 MPH...POST-TROPICAL\n 12H  10/1800Z 33.7N  86.7W   25 KT  30 MPH...POST-TROP/INLAND\n 24H  11/0600Z 35.2N  86.0W   25 KT  30 MPH...POST-TROP/INLAND\n 36H  11/1800Z 37.6N  82.7W   20 KT  25 MPH...POST-TROP/INLAND\n 48H  12/0600Z...DISSIPATED\n \n"}