SUBJ: TROPICAL DISTURBANCE 28W (TWENTYEIGHT) WARNING NR 014 WTPN31 PGTW 150900 1. TROPICAL DISTURBANCE 28W (TWENTYEIGHT) WARNING NR 014 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 150600Z --- NEAR 22.5N 139.7E MOVEMENT PAST SIX HOURS - 285 DEGREES AT 08 KTS POSITION ACCURATE TO WITHIN 030 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 22.5N 139.7E --- FORECASTS: 12 HRS, VALID AT: 151800Z --- 23.1N 137.9E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 275 DEG/ 08 KTS --- 24 HRS, VALID AT: 160600Z --- 23.3N 136.1E MAX SUSTAINED WINDS - 015 KT, GUSTS 025 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 150900Z POSITION NEAR 22.7N 139.2E. 15OCT26. TROPICAL DISTURBANCE 28W (TWENTYEIGHT), LOCATED APPROXIMATELY 164 NM SOUTH-SOUTHWEST OF IWO TO, HAS TRACKED WEST- NORTHWESTWARD AT 08 KNOTS OVER THE PAST SIX HOURS. SCATTEROMETER DATA REVEALS THAT MAXIMUM SUSTAINED WINDS HAVE WEAKENED INTO A 20-KT TROPICAL DISTURBANCE. THE SYSTEM IS INTERACTING WITH A WALL OF DRY AIR ASSOCIATED WITH A SHEAR LINE TO ITS WEST. THIS INTERACTION WILL CAUSE 28W TO DEGENERATE INTO A TROPICAL WAVE WITHIN 24 HOURS, IF NOT SOONER, AS IT TRAVELS WESTWARD ALONG THE LOW-LEVEL FLOW. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. MINIMUM CENTRAL PRESSURE AT 150600Z IS 1009 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 150600Z IS 8 FEET. REFER TO TROPICAL DEPRESSION 29W (TWENTYNINE) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES. // BT #0001 NNNN