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Tropical Storm Rene Forecast Discussion Number 7
2020-09-08 22:34:18| National Hurricane Center (Atlantic)
Issued at 800 PM CVT Tue Sep 08 2020 000 WTNT43 KNHC 082034 TCDAT3 Tropical Storm Rene Discussion Number 7 NWS National Hurricane Center Miami FL AL182020 800 PM CVT Tue Sep 08 2020 Rene has not changed much throughout the day. The storm is producing deep convection that is loosely organized in bands around the center. The satellite intensity estimates are unchanged from earlier and range from 25 kt to 40 kt. Based on these data and the earlier ASCAT pass, the initial intensity is again held at 35 kt. The eastern-most bands of Rene are now pulling west of the Cabo Verde Islands, and the Tropical Storm Warning for those islands has been discontinued. Although Rene has struggled to maintain its intensity during the past 24 hours, the models insist that the cyclone will begin to take advantage of the generally conducive conditions of low wind shear, high moisture, and relatively warm waters. Therefore, the NHC intensity forecast continues to show Rene strengthening to a hurricane in a couple of days. Beyond that time, however, Rene will likely be moving into an environment of strong westerly wind shear, which should cause the storm to weaken in the 3-5 day time period. This forecast is largely an update of the previous one and closely follows the IVCN model. The tropical storm continues to move westward at 14 kt. There has been no significant change to the track forecast reasoning. A mid-level ridge should continue to steer Rene westward to west-northwestward for the next couple of days. After that time, the storm should slow down and gradually turn to the north and then to the northeast as it moves into a weakness in the ridge. There is a little less spread in the guidance this cycle, but there remain differences in the models concerning where and how sharply Rene recurves. The NHC track forecast is similar to the previous one and lies close to the TVCA and TVCX consensus models. FORECAST POSITIONS AND MAX WINDS INIT 08/2100Z 16.8N 27.9W 35 KT 40 MPH 12H 09/0600Z 17.2N 29.6W 40 KT 45 MPH 24H 09/1800Z 18.0N 32.2W 50 KT 60 MPH 36H 10/0600Z 18.9N 34.8W 60 KT 70 MPH 48H 10/1800Z 19.9N 37.0W 65 KT 75 MPH 60H 11/0600Z 21.3N 38.8W 70 KT 80 MPH 72H 11/1800Z 23.2N 40.3W 65 KT 75 MPH 96H 12/1800Z 27.7N 42.2W 55 KT 65 MPH 120H 13/1800Z 30.5N 40.5W 50 KT 60 MPH $$ Forecaster Cangialosi
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