{"id": "1225637210182451203", "title": "Tropical Cyclone Discussion", "adv_date": "2026-11-08T03:00:00Z", "msg": "210\nWTPA44 PHFO 080233\nTCDCP4\n \nTropical Storm Pena Discussion Number   6\nNWS Central Pacific Hurricane Center Honolulu HI   CP042026\nIssued by NWS National Hurricane Center Miami FL\n500 PM HST Sat Nov 07 2026\n\nPena's convective structure has changed little during the past few \nhours. Satellite imagery reveals that the low-level center remains \nobscured beneath a central dense overcast (CDO), with deep \nconvection displaced primarily to the northeast likely due to \nlight-to-moderate southwesterly vertical wind shear. However, there \nare subtle signs of improved organization, as curved banding \nfeatures have become more evident this cycle. A 2339 UTC AMSR3 \nmicrowave pass captured this banding well, and the latest D-MINT \nintensity estimate based on this data was 48 kt. The latest \nsubjective Dvorak intensity estimate from HFO was T3.5/55 kt, \nwhereas objective estimates from UW-CIMSS range from 42 to 48 kt. \nBased on a blend of these data, the initial intensity is increased \nto 50 kt.\n \nThe initial motion is estimated to be westward, or 280/8 kt. Pena is \nexpected to maintain a general westward track over the next couple \nof days while steered by a broad low- to mid-level ridge anchored to \nits north. Track guidance remains in excellent agreement through 60 \nto 72 h. Thereafter, an approaching upper-level shortwave trough \nshould induce a gradual turn toward the northwest along with a \nslight increase in forward speed, causing larger cross-track spread \namong the guidance solutions at longer forecast ranges. The updated \nNHC track forecast is virtually identical to the previous advisory \nthrough 60 h, then nudged slightly southward thereafter to lie \nbetween the prior forecast and the latest HCCA guidance.\n \nThe intensity forecast for Pena remains particularly challenging. \nStatistical SHIPS guidance suggests that Pena will steadily \nintensify throughout the forecast period, supported by warm SSTs and \nlight vertical wind shear. However, mid-level dry air entrainment \nand marginal upper-level outflow appear to be affecting the cyclone, \nlikely limiting significant intensification in the near term. This \ndilemma is reflected in the guidance, where large spread between the \ndynamical and statistical models results in lower-than-average \nforecast confidence. As a result, the new NHC intensity forecast \nclosely mirrors the prior advisory, remaining near the consensus \naids and along the upper edge of the multi-model envelope.\n \n \nFORECAST POSITIONS AND MAX WINDS\n \nINIT  08/0300Z 11.4N 154.5W   50 KT  60 MPH\n 12H  08/1200Z 11.6N 155.8W   55 KT  65 MPH\n 24H  09/0000Z 11.6N 157.6W   55 KT  65 MPH\n 36H  09/1200Z 11.5N 159.6W   60 KT  70 MPH\n 48H  10/0000Z 11.5N 161.7W   60 KT  70 MPH\n 60H  10/1200Z 11.6N 163.8W   60 KT  70 MPH\n 72H  11/0000Z 11.8N 166.2W   60 KT  70 MPH\n 96H  12/0000Z 12.6N 172.1W   65 KT  75 MPH\n120H  13/0000Z 14.0N 178.9W   65 KT  75 MPH\n \n"}