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Tropical Depression Peter Forecast Discussion Number 17
2021-09-22 22:58:08| National Hurricane Center (Atlantic)
Issued at 500 PM AST Wed Sep 22 2021 000 WTNT41 KNHC 222058 TCDAT1 Tropical Depression Peter Discussion Number 17 NWS National Hurricane Center Miami FL AL162021 500 PM AST Wed Sep 22 2021 Peter continues to just barely maintain its classification as a tropical cyclone. While the low-level circulation has remained intact today, the convection continues to be located well downshear to the east. However, there have been a few convective elements forming a bit closer to the center recently and that is the primarily justification for maintaining advisories on Peter as a tropical cyclone this afternoon. The initial intensity is maintained at 30 kt given the earlier scatterometer data, though this might be generous. Continued strong southwesterly vertical wind shear within a dry mid-level environment should ultimately strip the remaining convection away from Peter, with the tropical cyclone expected to finally peter out as a post-tropical remnant low in the next 12 hours. The depression has been moving very slowly recently, with an estimated north-northwestward motion of 340/4 kt. The cyclone is expected to turn northward and then north-northeastward following a weakness in the low-level ridge until the system finally opens up into a trough, sometime in the 48 to 60 hour period. FORECAST POSITIONS AND MAX WINDS INIT 22/2100Z 21.7N 66.7W 30 KT 35 MPH 12H 23/0600Z 22.5N 66.8W 25 KT 30 MPH...POST-TROP/REMNT LOW 24H 23/1800Z 23.5N 66.6W 25 KT 30 MPH...POST-TROP/REMNT LOW 36H 24/0600Z 24.4N 66.1W 25 KT 30 MPH...POST-TROP/REMNT LOW 48H 24/1800Z 25.6N 65.3W 25 KT 30 MPH...POST-TROP/REMNT LOW 60H 25/0600Z...DISSIPATED $$ Forecaster Papin
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