ZCZC HFOTCDCP2 ALL TTAA00 PHFO DDHHMM Post-Tropical Cyclone Jimena Discussion Number 17 NWS Central Pacific Hurricane Center Honolulu HI EP092021 500 PM HST Fri Aug 06 2021 Deep convection near center of Jimena collapsed overnight, and Jimena consists of a low cloud swirl with shallow convection flaring along its northern and eastern flanks. Dvorak current intensity estimates varied from 1.5 at HFO to unclassifiable at SAB, while CIMSS ADT held onto a 2.0/30 kt. Jimena is moving over sub 24C sea surface temperatures as it draws in dry air from the north, and westerly vertical wind shear of more than 15 kt is increasing. Given its current structure and the hostile environment ahead, Jimena has been downgraded to a post-tropical remnant low with an initial intensity of 30 kt. Post-Tropical Cyclone Jimena will continue to be steered toward the west-northwest (295 degrees) around 7 kt tonight by a deep subtropical ridge to the north. Under an environment of cool sea surface temperatures and continued westerly vertical wind shear, the increasingly shallow system will move toward the west this weekend until dissipation. This is the last advisory issued by the Central Pacific Hurricane Center on Jimena. Additional information on this system can be found in the High Seas Forecasts issued by the National Weather Service in Honolulu under AWIPS header HFOHSFNP and WMO header FZPN40 PHFO. FORECAST POSITIONS AND MAX WINDS INIT 07/0300Z 17.9N 140.8W 30 KT 35 MPH...POST-TROPICAL 12H 07/1200Z 18.5N 142.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 24H 08/0000Z 18.9N 143.3W 25 KT 30 MPH...POST-TROP/REMNT LOW 36H 08/1200Z 19.2N 144.8W 20 KT 25 MPH...POST-TROP/REMNT LOW 48H 09/0000Z...DISSIPATED $$ Forecaster Wroe NNNN
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Page last modified: Friday, 31-Dec-2021 12:09:57 UTC