ZCZC HFOTCDCP1 ALL TTAA00 PHFO DDHHMM Post-Tropical Cyclone Boris Discussion Number 15 NWS Central Pacific Hurricane Center Honolulu HI EP032020 500 PM HST Sat Jun 27 2020 The low-level circulation center of Boris has been exposed through most of the day. There have been only two, brief flare ups of deep convection near the center during the past 24 hours with another one starting now. The system is also surrounded by dry air aloft as southeasterly vertical wind shear persists, and JTWC, PHFO, and SAB all deemed the system too weak to classify this afternoon. Thus, Boris will be designated as a post-tropical remnant low with an intensity of 25 kt. Additional bursts of convection can be expected as the system slowly spins down over the next couple of days, even as vertical wind shear relaxes on Sunday. The center of Boris is moving toward the west-southwest (255/07 kt) under the influence of a deep ridge to the north. This general motion, along with a slight increase in forward speed, is expected to continue over the next couple of days until dissipation. The track forecast is essentially an update from the last advisory and remains within a tightly clustered guidance envelope. This is the last advisory issued by the Central Pacific Hurricane Center on Boris. 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 28/0300Z 12.1N 142.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 12H 28/1200Z 11.8N 143.3W 25 KT 30 MPH...POST-TROP/REMNT LOW 24H 29/0000Z 11.2N 145.1W 25 KT 30 MPH...POST-TROP/REMNT LOW 36H 29/1200Z 10.5N 147.1W 20 KT 25 MPH...POST-TROP/REMNT LOW 48H 30/0000Z...DISSIPATED $$ Forecaster Wroe NNNN
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Page last modified: Thursday, 31-Dec-2020 12:11:02 UTC