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| #1201952 (Received by flhurricane at: 10:36 PM 05.Oct.2024) TCDAT4 Tropical Storm Milton Discussion Number 3 NWS National Hurricane Center Miami FL AL142024 1000 PM CDT Sat Oct 05 2024 Milton appears to be slowly organizing. The storm has a central dense overcast pattern with deep convection persisting near and to the south of the center. The latest satellite intensity estimates range from 30 to 50 kt, and based on that data, the initial intensity is nudged upward to 40 kt. Milton is a small storm at the moment, with its estimated tropical-storm-force winds extending only about 30 n mi from the center. The storm is moving slowly northeastward at 4 kt as it remains embedded in weak steering currents. However, a shortwave trough is expected to push southward into the northern Gulf of Mexico. This trough and a reinforcing one should cause Milton to turn eastward on Sunday, and move progressively faster to the east and then northeast across the Gulf of Mexico and Florida during the next 3 to 4 days. The guidance is in fair agreement, but there is some spread in both direction and timing. Overall, the models have trended slower this cycle, and the NHC track forecast has been adjusted in that direction. This prediction is near the middle of the guidance envelope and close to the typically best-performing consensus aids. It should be noted that the average NHC track error at day 4 is around 150 miles. Therefore, users are reminded to not focus on the exact track. Milton will likely steadily strengthen during the next few days as it moves over the very warm Gulf of Mexico waters, remains in a moist air mass, and in a diffluent and low to moderate wind shear environment. The big question is how quickly and by how much will the storm intensify. There is a big spread in the intensity models, with the hurricane regional models notably above the global and statistical-dynamical models. The new intensity forecast is a little higher than the previous one and in good agreement with the HCCA and IVCN aids. It is hoped that the models will come into better agreement tomorrow after ingesting some of the Hurricane Hunter aircraft observations. Regardless of the details, there is increasing confidence that a powerful hurricane with life-threatening hazards will be affecting portions of the Florida west coast around the middle of next week. Residents there should closely monitor this system and listen to local officials. Key Messages: 1. Milton is forecast to quickly intensify while it moves eastward to northeastward across the Gulf of Mexico and be at or near major hurricane strength when it reaches the west coast of the Florida Peninsula mid week. Hurricane Watches could be issued as early as late Sunday for portions of Florida. 2. There is an increasing risk of life-threatening storm surge and wind impacts for portions of the west coast of the Florida Peninsula beginning late Tuesday or Wednesday. Residents in these areas should ensure they have their hurricane plan in place, follow any advice given by local officials, and check back for updates to the forecast. 3. Areas of heavy rainfall will impact portions of Florida Sunday and Monday well ahead of Milton, with heavy rainfall more directly related to the system expected later on Tuesday through Wednesday night. This rainfall brings the risk of flash, urban, and areal flooding, along with minor to moderate river flooding. FORECAST POSITIONS AND MAX WINDS INIT 06/0300Z 22.9N 95.1W 40 KT 45 MPH 12H 06/1200Z 23.0N 94.6W 50 KT 60 MPH 24H 07/0000Z 23.0N 93.5W 60 KT 70 MPH 36H 07/1200Z 23.1N 92.1W 75 KT 85 MPH 48H 08/0000Z 23.3N 90.5W 85 KT 100 MPH 60H 08/1200Z 23.9N 88.6W 95 KT 110 MPH 72H 09/0000Z 25.3N 86.4W 105 KT 120 MPH 96H 10/0000Z 28.2N 82.3W 95 KT 110 MPH 120H 11/0000Z 30.8N 76.1W 65 KT 75 MPH...POST-TROP/EXTRATROP $$ Forecaster Cangialosi |
