Tropical Cyclone Discussion
686 WTNT44 KNHC 062039 TCDAT4 Tropical Depression Nine Discussion Number 1 NWS National Hurricane Center Miami FL AL092026 400 PM CDT Tue Oct 06 2026 Satellite imagery indicates that the area of low pressure located over the southwestern Gulf of America has recently developed a closed circulation, though it might still be elongated. Associated showers and thunderstorms have also become better organized, and this system now meets the criteria to be a tropical depression, the ninth one of the season. The initial intensity is set at 30 kt based on a Dvorak classification from TAFB. The depression has barely moved over the past 6 to 12 hours, with the initial motion estimated to be 120/1 kt. The cyclone is expected to track slowly eastward or east-northeastward during the next couple of days while it moves in the flow near the base of a broad deep-layer trough, and could bring gusty winds and heavy rains to the western portions of the Yucatan Peninsula on Thursday. By Friday, a sharp turn to the northeast is expected when a shortwave trough forms over Texas and a ridge strengthens over the western Atlantic. This pattern change should cause the system to accelerate toward the northern Gulf Coast on Friday and into early Saturday. The NHC track forecast lies near the fast side of the guidance, in best agreement with the GDMI and ECAI aids. It should be noted that there is significant uncertainty in where the system makes the northeast turn and how fast it moves toward the coast. It appears that the stronger the system gets, the faster it will move toward the coast given the strength of the deep-layer flow. The NOAA G-IV jet is currently sampling the environment and special upper-air soundings are being deployed over the south-central U.S. The assimilation of these data into the dynamical models should improve their representation of the current environmental conditions, ideally yielding more reliable track and intensity guidance. The environmental conditions appear generally conducive for strengthening over the next few days, and given that the storm appears compact, it will likely steadily strengthen during that time. The NHC intensity forecast shows the system becoming a tropical storm by early Wednesday and a hurricane on Thursday. Based on the environmental conditions and the model guidance, the cyclone will likely peak in strength before reaching the coast. Although not seen in the forecast, some weakening seems likely when the storm nears the Gulf Coast due to an increase in vertical wind shear, but it is still expected to be a dangerous hurricane when it makes landfall. This forecast is in fair agreement with the consensus aids, but it should be noted that there are skillful models that are higher than the current forecast. Although the storm is expected to be compact for the next few days, it will likely grow significantly in size, particularly on the eastern side, when it reaches the northern Gulf Coast. Therefore, based on the forecast uncertainty and expected larger size, users are urged not to focus on the forecast points and stay tuned to updates. Key Messages: 1. There is an increasing risk of dangerous wind and storm surge impacts along portions of the northern Gulf Coast, and watches could be required on Wednesday. Residents from Louisiana to the Florida Panhandle should closely monitor the latest forecast updates and ensure they have their hurricane plan in place. 2. The system will bring areas of heavy rainfall to the central U.S. Gulf coast Friday into the weekend. Flash and urban flooding, along with isolated river flooding, will be possible. 3. Yucatan Peninsula of Mexico: The depression is expected to strengthen and could bring gusty winds and areas of heavy rain to the western portion of the Yucatan Peninsula in a couple of days. FORECAST POSITIONS AND MAX WINDS INIT 06/2100Z 22.1N 95.6W 30 KT 35 MPH 12H 07/0600Z 22.1N 95.0W 35 KT 40 MPH 24H 07/1800Z 22.6N 93.4W 45 KT 50 MPH 36H 08/0600Z 23.1N 91.8W 55 KT 65 MPH 48H 08/1800Z 24.2N 90.1W 70 KT 80 MPH 60H 09/0600Z 25.9N 88.8W 80 KT 90 MPH 72H 09/1800Z 28.5N 88.3W 85 KT 100 MPH 96H 10/1800Z 34.0N 88.7W 30 KT 35 MPH...INLAND 120H 11/1800Z 38.9N 86.5W 20 KT 25 MPH...POST-TROP/INLAND