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Tropical Depression Mindy Forecast Discussion Number 5
2021-09-09 22:39:12| National Hurricane Center (Atlantic)
Issued at 500 PM EDT Thu Sep 09 2021 000 WTNT43 KNHC 092039 TCDAT3 Tropical Depression Mindy Discussion Number 5 NWS National Hurricane Center Miami FL AL132021 500 PM EDT Thu Sep 09 2021 The latest infrared satellite imagery indicates that Mindy has been devoid of convection near its center since about the time it emerged over the Atlantic this morning. Deep convection is present well to the northeast of Mindy along a surface trough that extends northeastward from the cyclone. A late morning ASCAT pass showed a large area of 25 to 30 kt winds southeast of the center. The initial intensity is set to 30 kt based on this data. The ASCAT data and surface observations indicate that the circulation has become less well-defined, with barely any east winds observed on the north side. Mindy is located in an environment of strong south to southwesterly vertical wind shear. Over the next 24 h, the shear is expected to become even stronger. The latest forecast calls for Mindy to become post-tropical on Friday and dissipate Friday night. However, based on the lack on convection and the deteriorating wind structure, it is quite possible that dissipation could occur much sooner than forecast. Mindy continues moving quickly off to the east-northeast, with a motion of 075/20 kt. There has been no change to the track forecast philosophy. Mindy is forecast to continue moving east-northeastward at a similar speed for the next 24 h near the southern portion of a deep-layer trough moving across the eastern United States. Once the trough begins to lift northeastward, Mindy should slow down a little on Friday. The NHC forecast is a little south of and slightly faster than the previous forecast, mainly due to the farther south initial position. FORECAST POSITIONS AND MAX WINDS INIT 09/2100Z 32.0N 78.3W 30 KT 35 MPH 12H 10/0600Z 32.9N 74.9W 30 KT 35 MPH 24H 10/1800Z 33.8N 71.2W 30 KT 35 MPH...POST-TROPICAL 36H 11/0600Z...DISSIPATED $$ Forecaster D. Zelinsky/Hagen
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