WTXS31 PGTW 110300 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 26S (SEROJA) WARNING NR 027// RMKS/ 1. TROPICAL CYCLONE 26S (SEROJA) WARNING NR 027 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 110000Z --- NEAR 24.2S 110.5E MOVEMENT PAST SIX HOURS - 155 DEGREES AT 18 KTS POSITION ACCURATE TO WITHIN 045 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 064 KT WINDS - 035 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT RADIUS OF 050 KT WINDS - 055 NM NORTHEAST QUADRANT 055 NM SOUTHEAST QUADRANT 025 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT 095 NM SOUTHEAST QUADRANT 060 NM SOUTHWEST QUADRANT 090 NM NORTHWEST QUADRANT REPEAT POSIT: 24.2S 110.5E --- FORECASTS: 12 HRS, VALID AT: 111200Z --- 28.0S 114.2E MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT 090 NM SOUTHEAST QUADRANT 060 NM SOUTHWEST QUADRANT 110 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 135 DEG/ 33 KTS --- 24 HRS, VALID AT: 120000Z --- 32.4S 120.0E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL --- REMARKS: 110300Z POSITION NEAR 25.1S 111.4E. 11APR21. TROPICAL CYCLONE (TC) 26S (SEROJA), LOCATED APPROXIMATELY 229 NM WEST-SOUTHWEST OF LEARMONTH, AUSTRALIA, HAS TRACKED SOUTH- SOUTHEASTWARD AT 18 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS TIGHTLY-CURVED BANDING WRAPPING AROUND A WEAK, FORMATIVE EYE. A 102111Z SSMIS 91GHZ MICROWAVE IMAGE REVEALS A COMPACT SYSTEM WITH DEEP CONVECTIVE BANDING PRIMARILY OVER THE SOUTHERN SEMICIRCLE WRAPPING INTO THE NORTH QUADRANT. OVERALL, THERE IS GOOD CONFIDENCE IN THE INITIAL POSITION. THE INITIAL INTENSITY REMAINS ASSESSED AT 65 KNOTS BASED ON DVORAK INTENSITY ESTIMATES RANGING FROM T4.0 (65 KNOTS) TO T4.5 (77 KNOTS). TC 26S IS EXPECTED TO ACCELERATE SOUTHEASTWARD THROUGH THE FORECAST PERIOD WITHIN THE MIDLATITUDE WESTERLY FLOW POLEWARD OF A DEEP-LAYERED SUBTROPICAL RIDGE POSITIONED TO THE NORTHEAST. THE SYSTEM HAS COMMENCED EXTRA-TROPICAL TRANSITION (ETT) AND WILL QUICKLY COMPLETE ETT BY TAU 24 AS IT BECOMES EMBEDDED WITHIN THE WESTERLIES AND GAINS FRONTAL CHARACTERISTICS. TC 26S WILL WEAKEN RAPIDLY AFTER TAU 12 AS IT ENCOUNTERS STRONG VWS (25-35 KNOTS) AND TRACKS OVER SOUTHWESTERN AUSTRALIA. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 110000Z IS 27 FEET. NEXT WARNINGS AT 110900Z, 111500Z AND 112100Z.// NNNN