BOCA RATON, FL (BocaNewsNow.com) — The 2pm update from the National Hurricane Center makes two points — there is still tremendous uncertainty, but that the potential exists for Dorian to be major storm that COULD affect Palm Beach County over the Labor Day Weekend.
The graphic is the 2pm update. The narrative is the most recent from the National Hurricane Center.Satellite and radar images indicate that the cloud pattern has become better organized during the past several hours. This was confirmed by data from an Air Force reconnaissance plane currently investigating Dorian, which reported a flight-level wind of 72 kt and a peak SFMR value of 60 kt. The estimated central pressure was 999 mb in the last fix. On this basis the initial intensity has been adjusted upward to 60 kt. Only a slow strengthening is anticipated today while Dorian is moving through the U.S. and British Virgin Islands. However, once the cyclone reaches the western Atlantic well east of the Bahamas, it will encounter a favorable environment of low shear and warm waters, resulting in a more marked intensification. The NHC foreast is more aggressive than the previous one, and brings Dorian to category 3 intensity by the end of the period. This forecast very closely follows the intensity consensus, the HCCA model, and the SHIPS guidance. Fixes from the reconnaissance plane indicate that Dorian has been moving toward the northwest or 315 degrees at 11 kt. The cyclone is heading toward a weakness in the Atlantic subtropical ridge, and this motion should continue for the next 2 to 3 days. However, after that time, all global models build a robust ridge over the western Atlantic, and this flow pattern should force Dorian to turn more to the west-northwest toward Florida and the southeast coast of the United States. All indications are that by this Labor Day weekend, a powerful hurricane will be near the Florida or southeastern coast of the United States. The new NHC track forecast is not significantly different from the previous one, and it very closely follows the multi-model consensus TVCA and the HCCA. Users are reminded not to focus on the exact forecast track, as the average 5-day track error is around 200 miles. Key Messages: 1. Hurricane conditions are expected in the U.S. and British Virgin Islands, Culebra, and Vieques today. Tropical storm conditions are expected in Puerto Rico today with hurricane conditions possible. 2. Heavy rainfall over portions of Puerto Rico and the U.S. and British Virgin Islands could produce flash flooding during the next couple of days. Heavy rains are expected to occur over portions of the Bahamas, Florida, and elsewhere in the southeastern Untied States later this week and into early next week. 3. The risk of dangerous storm surge and hurricane-force winds is increasing in the central and northwestern Bahamas and along the Florida east coast, although it is too soon to determine where these hazards will occur. Residents in these areas should ensure that they have their hurricane plan in place and not focus on the exact forecast track of Dorian’s center. FORECAST POSITIONS AND MAX WINDS INIT 28/1500Z 17.5N 64.5W 60 KT 70 MPH 12H 29/0000Z 18.7N 65.7W 65 KT 75 MPH 24H 29/1200Z 20.5N 67.0W 65 KT 75 MPH 36H 30/0000Z 22.4N 68.4W 70 KT 80 MPH 48H 30/1200Z 24.2N 69.9W 75 KT 85 MPH 72H 31/1200Z 26.5N 74.0W 90 KT 105 MPH 96H 01/1200Z 27.7N 77.7W 100 KT 115 MPH 120H 02/1200Z 28.6N 80.3W 100 KT 115 MPH
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