ZCZC MIATCDEP4 ALL TTAA00 KNHC DDHHMM Post-Tropical Cyclone Bonnie Discussion Number 49 NWS National Hurricane Center Miami FL EP042022 200 PM PDT Sat Jul 09 2022 Bonnie has now been devoid of deep convection for over 12 hours, which means it has degenerated into a post-tropical low and this will be the last advisory. An ASCAT pass around 1800 UTC showed maximum winds between 35 and 40 kt, so with the assumption of some continued weakening, the advisory intensity is 35 kt. Additional gradual weakening is anticipated over the next day or so while the convection-less low moves quickly westward between 15-18 kt over waters of 23-24 degrees Celsius and further into a drier, more stable air mass. Global model surface fields indicate that Bonnie's circulation should open up into a trough by Sunday night, and dissipation is now shown in the forecast at 36 hours. For additional information on the post-tropical low please see High Seas Forecasts issued by the National Weather Service...under AWIPS header NFDHSFEPI and WMO header FZPN02 KWBC. FORECAST POSITIONS AND MAX WINDS INIT 09/2100Z 19.5N 129.4W 35 KT 40 MPH...POST-TROPICAL 12H 10/0600Z 19.5N 132.1W 30 KT 35 MPH...POST-TROP/REMNT LOW 24H 10/1800Z 19.5N 135.2W 30 KT 35 MPH...POST-TROP/REMNT LOW 36H 11/0600Z...DISSIPATED $$ Forecaster Berg NNNN
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