{"id": "1218774449787207683", "title": "Tropical Cyclone Discussion", "adv_date": "2026-10-14T21:00:00Z", "msg": "248\nWTPZ41 KNHC 142047\nTCDEP1\n \nTropical Storm Trudy Discussion Number   6\nNWS National Hurricane Center Miami FL       EP212026\n300 PM CST Wed Oct 14 2026\n \nTrudy continues to become better organized, with the central \nconvective mass becoming larger and colder.  Recent SAR, ASCAT and \nSSMIS passes give higher confidence that the center position is now \nembedded underneath the middle of the impressive-looking convective \novercast.  The latest TAFB intensity estimate is 4.0/65 kt, and \nobjective estimates from UW-CIMSS have been increasing, now in the \n44-51 kt range.  The ASCAT-B pass from around 16Z had a peak wind \nretrieval of 51 kt.  Based on the above data, the initial intensity \nis conservatively set at 55 kt.\n \nBased on microwave center fixes over the past 6 to 12 hours, Trudy \nhas been moving west-northwestward, or 300/8 kt, to the south of a \nmid-level ridge that extends over central Mexico. However, the ridge \nis expected to weaken on Thursday, as Trudy moves closer to \nHurricane Simon.  The two tropical cyclones are forecast to be \nwithin 500 miles of each other by Thursday evening, which could be \nclose enough to influence each other's steering.  By Thursday, an \namplifying mid- to upper-level trough in the west-central Gulf of \nAmerica and this possible interaction with Simon should cause Trudy \nto turn north-northwestward and possibly northward for a time \nThursday night or Friday.  As Simon finally moves northwest late in \nthe forecast period, it should allow the ridge to build back in and \ninduce Trudy to make a leftward turn back toward the northwest. \nSince Simon is a small tropical cyclone though, it may not have much \nof an influence on Trudy's track, which could allow Trudy to turn \nwest-northwestward and away from the coast of Mexico by the end of \nthe forecast period.  The latest NHC track forecast is similar to \nthe previous one through 96 hours, but is farther south at day 5, \nindicating a sharper turn toward the west-northwest or west by the \nend of the forecast period.\n\nEnvironmental conditions continue to look quite favorable along \nTrudy's track through the next 60 hours, although recent NESDIS \nglider observations suggest that Trudy may briefly traverse lower \nocean heat content for 24 hours between this evening and Thursday \nevening before reaching higher ocean heat content again.  The wind \nshear will remain low through about 60 hours, but the ECMWF-based \nSHIPS guidance shows southwesterly vertical wind shear around 20 kt \nfrom day 3 to 5.  The NHC intensity forecast is similar to the \nprevious one, calling for steady to rapid intensification over the \nnext couple of days, peaking around 115 kt around hour 60. This is \nsimilar to the HCCA, GDMI, HAFS-A, and HAFS-B, all of which peak \nTrudy as a major hurricane between 105-120 kt in about 60 hours.  \nAfter that time, increasing wind shear and drier air should cause \nsteady weakening.  The NHC intensity forecast remains near the high \nend of the overall model guidance suite.\n \nNHC continues to call for Trudy to get close to the coast of Mexico \nas a major hurricane, and given the track uncertainty, residents of \nsouthwestern and west-central Mexico should continue to closely \nmonitor the progress of Trudy, and be ready to possibly implement \ntheir hurricane plan.\n \n \nKey Messages:\n \n1. Trudy is forecast to be a major hurricane as it approaches the\ncoast of southwestern and west-central Mexico late this week and\ninto the weekend. There is an increasing risk of wind, rain, and\nstorm surge impacts, and watches could be required for a portion of\nthese areas later today or tonight.\n\n2. Large swells will likely begin to affect portions of the coast of \nsouthwestern Mexico late this week and continue through the weekend. \nThese swells could cause life-threatening surf and rip current \nconditions. \n \n \nFORECAST POSITIONS AND MAX WINDS\n \nINIT  14/2100Z 11.9N 100.0W   55 KT  65 MPH\n 12H  15/0600Z 12.5N 100.8W   70 KT  80 MPH\n 24H  15/1800Z 13.2N 101.4W   80 KT  90 MPH\n 36H  16/0600Z 14.0N 101.7W   95 KT 110 MPH\n 48H  16/1800Z 14.9N 102.0W  110 KT 125 MPH\n 60H  17/0600Z 15.8N 102.5W  115 KT 130 MPH\n 72H  17/1800Z 16.9N 103.3W  110 KT 125 MPH\n 96H  18/1800Z 18.8N 105.3W   90 KT 105 MPH\n120H  19/1800Z 19.4N 107.2W   65 KT  75 MPH\n \n"}