WTPN31 PGTW 192100 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 04W (SINLAKU) WARNING NR 044// RMKS/ 1. TROPICAL STORM 04W (SINLAKU) WARNING NR 044 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 191800Z --- NEAR 28.7N 156.1E MOVEMENT PAST SIX HOURS - 080 DEGREES AT 21 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 050 KT WINDS - 000 NM NORTHEAST QUADRANT 000 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 090 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 200 NM NORTHEAST QUADRANT 250 NM SOUTHEAST QUADRANT 230 NM SOUTHWEST QUADRANT 170 NM NORTHWEST QUADRANT REPEAT POSIT: 28.7N 156.1E --- FORECASTS: 12 HRS, VALID AT: 200600Z --- 29.4N 161.1E MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 050 KT WINDS - 000 NM NORTHEAST QUADRANT 000 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 080 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 190 NM NORTHEAST QUADRANT 220 NM SOUTHEAST QUADRANT 210 NM SOUTHWEST QUADRANT 160 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 085 DEG/ 22 KTS --- 24 HRS, VALID AT: 201800Z --- 29.5N 166.1E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 180 NM NORTHEAST QUADRANT 200 NM SOUTHEAST QUADRANT 180 NM SOUTHWEST QUADRANT 140 NM NORTHWEST QUADRANT --- REMARKS: 192100Z POSITION NEAR 28.9N 157.4E. 19APR26. TROPICAL STORM 04W (SINLAKU), LOCATED APPROXIMATELY 805 NM NORTHWEST OF WAKE ISLAND, HAS TRACKED EASTWARD AT 21 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY DEPICTS AN ELONGATED LOW-LEVEL CIRCULATION CENTER EXPOSED IN ALL BUT THE NORTHEAST QUADRANTS. CONVECTIVE ACTIVITY IS EVIDENT ALONG A DEVELOPING WARM FRONT EXTENDING EAST FROM THE LLCC, A CERTAIN INDICATOR OF THE ONGOING EXTRATROPICAL TRANSITION PROCESS. THE ENVIRONMENTAL CONDITIONS ARE HIGHLY UNFAVORABLE FOR TROPICAL CYCLONE DEVELOPMENT, HOWEVER, THEY ARE CONDUCIVE TO SUSTAINING THE EXTRATROPICAL LOW IN THE NEAR TERM (PRIMARILY DUE TO STRONG POLEWARD OUTFLOW AND BAROCLINIC FORCING). 04W IS FORECAST TO CONTINUE ON A RAPID EASTWARD TRAJECTORY AS IT COMPLETES EXTRATROPICAL TRANSITION IN THE NEXT 12 HOURS, AND WILL MAINTAIN THAT TRAJECTORY THROUGH THE END OF THE FORECAST PERIOD. THE GALE FORCE WIND FIELD IS EXPECTED TO REMAIN BROAD THROUGHOUT THE FORECAST PERIOD, WITH MAXIMUM SUSTAINED WINDS SLOWLY DECREASING TO 45 KTS BY TAU 24. NUMERICAL MODEL GUIDANCE IS IN TIGHT AGREEMENT ABOUT THE STORM TRACK, INTENSITY, AND EXTRATROPICAL TRANSITION SCENARIO. 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 191800Z IS 986 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 191800Z IS 30 FEET.// NNNN