FATO40 NFFN 272237 TONGA AREA FORECAST VALID FROM OCTOBER 280000 TO 281200 UTC 2025. SITUATION: A MOIST NORTHEASTERLY WIND FLOW PREVAILS OVER THE AREA AT THE SURFACE. MEANWHILE, A WEAK TROUGH OF LOW PRESSURE REMAINS SLOW MOVING OVER THE NORTHERN PARTS OF TONGA. WINDS: [SPEED IN KNOTS] FL240 14015M19 FL180 13015M09 FL140 13010P00 FL100 12010 FL070 11015 FL050 09015 FL020 08020 SIGWX: ISOL SHRA. VIS: 40KM, 10KM-15KM IN -SHRA, 5000M-10KM IN SHRA. CLOUD: FEW-SCT CU 015-030, TOPS 100-180, BKN IN SIGWX. SCT-BKN SC 030-050 SCT-BKN ACAS ABV FL100 IN SIGWX. TAF NFTV 272217Z 2800/2824 08012KT 9999 SCT016 BKN100= TAF NFTL 272218Z 2800/2812 10012KT 9999 SCT017= TAF NFTF 272220Z 2800/2824 08010KT 9999 SCT016=