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| #981480 (Received by flhurricane at: 1:58 PM 07.Sep.2019) TCDAT3 Tropical Storm Gabrielle Special Discussion Number 17 NWS National Hurricane Center Miami FL AL082019 1230 PM AST Sat Sep 07 2019 ASCAT data received just as the previous advisory was issued revealed that Gabrielle`s center had re-formed closer to the deep convection, and is about a degree west of where it was previously estimated. This new center is also now more evident in visible satellite imagery. The updated position deviates from the previously issued forecast track by a large enough distance to require the issuance of a special advisory. Based on the re-formation of the center, the longer-term motion is estimated to be west-northwestward, or 300/19 kt. The forecast track has been shifted about a degree westward to account for the corresponding westward relocation of the center. The initial wind radii have been adjusted based on the ASCAT data, which led to an update in the forecast wind radii as well. The initial intensity of 45 kt was confirmed by the scatterometer data, so no changes were made to the intensity forecast. FORECAST POSITIONS AND MAX WINDS INIT 07/1630Z 31.4N 45.2W 45 KT 50 MPH 12H 08/0000Z 32.4N 46.9W 45 KT 50 MPH 24H 08/1200Z 34.0N 48.8W 50 KT 60 MPH 36H 09/0000Z 36.5N 49.0W 55 KT 65 MPH 48H 09/1200Z 39.4N 47.5W 60 KT 70 MPH 72H 10/1200Z 45.0N 38.0W 65 KT 75 MPH 96H 11/1200Z 51.5N 23.5W 55 KT 65 MPH...POST-TROP/EXTRATROP 120H 12/1200Z...DISSIPATED $$ Forecaster Berg |