{"id": "1206526623927173123", "title": "Tropical Cyclone Discussion", "adv_date": "2026-09-01T15:00:00Z", "msg": "560\nWTPZ41 KNHC 011431\nTCDEP1\n \nHurricane Karina Discussion Number  21\nNWS National Hurricane Center Miami FL       EP112026\n500 AM HST Tue Sep 01 2026\n \nKarina remains a powerful category 4 hurricane, although there are \nsome signs that the cyclone might be near its peak intensity. Over \nthe past few hours, the eye has become cloud-filled and the \nconvective pattern is not quite as symmetric. A blend of the latest \nsatellite intensity estimates supports maintaining the initial \nintensity at 120 kt.  Despite being very strong, the overall cloud \npattern and wind field are relatively compact. \n\nThe major hurricane is moving westward at about 10 kt. A general \nslow westward to west-northwestward motion is expected during the \nnext 3 to 4 days as a narrow mid-level ridge remains situated to the \nnorth of the hurricane. Over the weekend, a turn to the northwest \nseems likely as the ridge shifts eastward and as the cyclone \napproaches a mid- to upper-level low north of Hawaii. Little change \nwas made to the previous track forecast, except for a nudge to the \nnorth toward the end of the period. This track forecast is based on \na blend of the HCCA, GDMI, and TVCN models. It should be noted that \nthere is a fair amount of spread from days 3 to 5, and confidence in \nthat part of the track forecast is lower than average.\n\nKarina is forecast to gradually lose strength over the next several \ndays. Although the wind shear is expected to remain low for the \nnext few days, progressively cooler SSTs and decreasing relative \nhumidity values should cause steady weakening. However, the \nhurricane could become annular, which might cause it to weaken at a \nslower pace than average. The models are unanimous in showing \nweakening, but vary on the rate. The NHC intensity forecast is \nsimilar to the previous one, and lies a little above the model \nconsensus. \n \n \nFORECAST POSITIONS AND MAX WINDS\n \nINIT  01/1500Z 18.1N 129.0W  120 KT 140 MPH\n 12H  02/0000Z 18.3N 130.4W  115 KT 130 MPH\n 24H  02/1200Z 18.8N 132.4W  105 KT 120 MPH\n 36H  03/0000Z 19.2N 134.2W   95 KT 110 MPH\n 48H  03/1200Z 19.5N 136.1W   85 KT 100 MPH\n 60H  04/0000Z 19.8N 137.9W   80 KT  90 MPH\n 72H  04/1200Z 20.1N 139.8W   75 KT  85 MPH\n 96H  05/1200Z 21.1N 143.4W   65 KT  75 MPH\n120H  06/1200Z 22.8N 146.2W   60 KT  70 MPH\n \n"}