ZCZC MIATCDEP2 ALL TTAA00 KNHC DDHHMM Hurricane John Discussion Number 6 NWS National Hurricane Center Miami FL EP122018 900 PM MDT Mon Aug 06 2018 John's satellite presentation has not changed significantly during the past few hours. The tops warmed up significantly earlier, but a new convective curved band is developing around the eye as we speak. T-numbers from TAFB and SAB are 4.0 on the Dvorak scale and on this basis, the initial intensity is keep at 65 kt in this advisory. The environment is quite favorable for intensification, and although the intensity guidance is not as aggressive as earlier, it still shows a strengthening hurricane, and this is reflected in the NHC forecast. Beyond 3 days, John should be moving over cooler waters, and rapid weakening should then begin. John is very likely to become a remnant low by day 5 or perhaps earlier. John continues to move toward the northwest or 315 degrees at 7 kt, steered by the flow around a strong subtropical ridge extending from the western United States westward across the Pacific. Since the steering pattern is well established, track models are tightly clustered increasing the confidence in the forecast. NHC keeps the hurricane in the middle of the guidance envelope very close to the HCCA corrected consensus and is not very different from the previous one. The core of John with its strongest winds is forecast to remain well off the Baja California Peninsula, but having said that, any deviation to the right of the track or an unexpected increase in the area of tropical force winds, could bring tropical-storm-force winds to portions of the west coast of the peninsula. Therefore, interests in the southern portion of the Baja California Peninsula should monitor the progress of this hurricane. FORECAST POSITIONS AND MAX WINDS INIT 07/0300Z 16.7N 108.6W 65 KT 75 MPH 12H 07/1200Z 17.4N 109.3W 80 KT 90 MPH 24H 08/0000Z 18.8N 110.4W 95 KT 110 MPH 36H 08/1200Z 20.4N 112.0W 105 KT 120 MPH 48H 09/0000Z 22.3N 114.0W 100 KT 115 MPH 72H 10/0000Z 25.5N 118.5W 70 KT 80 MPH 96H 11/0000Z 27.5N 122.5W 45 KT 50 MPH 120H 12/0000Z 27.5N 126.0W 30 KT 35 MPH...POST-TROP/REMNT LOW $$ Forecaster Avila NNNN
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Page last modified: Monday, 31-Dec-2018 12:10:43 UTC