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| #1015061 (Received by flhurricane at: 4:57 AM 03.Sep.2020) TCDAT5 Tropical Depression Omar Discussion Number 11 NWS National Hurricane Center Miami FL AL152020 500 AM AST Thu Sep 03 2020 Omar continues to produce bursts of deep convection with the center occasionally obscured beneath the northern edge of the convective canopy. Based on last evening`s ASCAT pass and a recent classification of T2.0 from TAFB, the initial intensity remains 30 kt. Amazingly, 50 kt of north-northwesterly shear has not been enough to prevent deep convection from developing, likely because Omar remains in an unstable thermodynamic environment and over sea surface temperatures of 27-28 degrees Celsius. These conditions are not expected to become less conducive for convective development, and the only thing that will likely make it harder for Omar to maintain convection will be the shear vector becoming increasingly out of phase with the storm motion vector during the next couple of days. With the current round of convection ongoing, it may take a little while longer for Omar to degenerate to a remnant low, and that occurrence has been pushed to 24 hours in the NHC forecast. Dissipation has been moved to 60 hours since all global models indicate that the remnant low`s circulation should open up into a trough by then. Omar is moving eastward (090/12 kt) along the northern periphery of the subtropical ridge. A general eastward motion should continue for the next 24 hours, with Omar then turning toward the northeast by 48 hours ahead of an approaching cold front. The NHC track forecast is down the middle of the tightly packed guidance suite, and this new prediction is very close to the previous forecast. FORECAST POSITIONS AND MAX WINDS INIT 03/0900Z 36.3N 62.4W 30 KT 35 MPH 12H 03/1800Z 36.0N 60.3W 30 KT 35 MPH 24H 04/0600Z 35.8N 58.4W 25 KT 30 MPH...POST-TROP/REMNT LOW 36H 04/1800Z 36.1N 57.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 48H 05/0600Z 37.2N 55.8W 25 KT 30 MPH...POST-TROP/REMNT LOW 60H 05/1800Z...DISSIPATED $$ Forecaster Berg |
