ZCZC MIATCDEP4 ALL TTAA00 KNHC DDHHMM Post-Tropical Cyclone Iselle Discussion Number 18 NWS National Hurricane Center Miami FL EP142020 300 PM MDT Sun Aug 30 2020 Iselle hasn't produced organized deep convection for about the past day, so it no longer meets the definition of a tropical cyclone. Thus, it is now a post-tropical remnant low, and this is the last advisory. The initial wind speed is set to 25 kt, which matches a recent ASCAT-B pass. Models are in good agreement on the low gradually turning from its current northward heading to north- northwest tomorrow and slowly weakening due to a poor environment. The low is expected to degenerate into a trough of low pressure on Tuesday, and no changes were made from the previous forecast. FORECAST POSITIONS AND MAX WINDS INIT 30/2100Z 23.7N 113.3W 25 KT 30 MPH...POST-TROPICAL 12H 31/0600Z 24.7N 113.4W 20 KT 25 MPH...POST-TROP/REMNT LOW 24H 31/1800Z 25.8N 113.8W 20 KT 25 MPH...POST-TROP/REMNT LOW 36H 01/0600Z...DISSIPATED $$ Forecaster Blake NNNN
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