NASA EONET events: Tropical Storm Etau

WTPN52 PGTW 302100 WARNING ATCG MIL 21W NWP 260830190846 2026083018 21W ETAU 016 02 050 09 SATL 060 T000 317N 1668E 030 T012 337N 1676E 030 T024 363N 1680E 030 AMP 000HR BECOMING EXTRATROPICAL 012HR EXTRATROPICAL 024HR EXTRATROPICAL SUBJ: TROPICAL DEPRESSION 21W (ETAU) WARNING NR 016 1. TROPICAL DEPRESSION 21W (ETAU) WARNING NR 016 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 301800Z --- NEAR 31.7N 166.8E MOVEMENT PAST SIX HOURS - 050 DEGREES AT 09 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING SUBTROPICAL REPEAT POSIT: 31.7N 166.8E --- FORECASTS: 12 HRS, VALID AT: 310600Z --- 33.7N 167.6E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY SUBTROPICAL VECTOR TO 24 HR POSIT: 005 DEG/ 13 KTS --- 24 HRS, VALID AT: 311800Z --- 36.3N 168.0E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY SUBTROPICAL --- REMARKS: 302100Z POSITION NEAR 32.2N 167.0E. 30AUG26. TROPICAL DEPRESSION 21W (ETAU), LOCATED APPROXIMATELY 744 NM NORTH OF WAKE ISLAND, HAS TRACKED NORTHEASTWARD AT 09 KNOTS OVER THE PAST SIX HOURS. ANIMATED INFRARED IMAGERY REVEALS TROPICAL DEPRESSION (TD) 21W IS AN HIGHLY ELONGATED SYSTEM POSITIONED DIRECTLY UNDER AN UPPER-LEVEL LOW. WITHIN THE LAST FEW HOURS, 21W CROSSED THE 26C ISOTHERM AND BEGAN SUBTROPICAL TRANSITION. ENVIRONMENTAL ANALYSIS REVEALS A HIGHLY UNFAVORABLE ENVIRONMENT, CHARACTERIZED BY HIGH (30-35 KTS) VERTICAL WIND SHEAR, COOL (25-26 C) SEA SURFACE TEMPERATURES, POOR OUTFLOW AFLOFT, AND PERSISTENT DRY AIR ENTRAINMENT. 21W IS FORECAST TO CONTINUE TRACKING POLEWARD WHILE IT QUICKLY COMPLETES SUBTROPICAL TRANSITION. ADDITIOANLLY, DETERMINISTIC MODEL GUIDANCE DEPICTS 21W DISSIPATING COMPLETELY WITHIN 12 HOURS. INTENSITY AIDS ARE IN STRONG AGREEMENT THAT 21W WILL MAINTAIN ITS INTENSITY FOR THE DURATION OF THE FORECAST PERIOD. SUBTROPICAL TRANSITION IS FORECAST TO OCCUR WITHIN 12 HOURS. 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 301800Z IS 991 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 301800Z IS 20 FEET. REFER TO TROPICAL STORM 20W 2126082518 167N1674E 20 2126082600 176N1675E 20 2126082606 184N1675E 25 2126082612 194N1674E 25 2126082618 199N1676E 30 2126082700 204N1677E 35 2126082706 212N1679E 40 2126082712 220N1679E 40 2126082718 230N1678E 45 2126082800 240N1675E 45 2126082806 246N1668E 45 2126082812 252N1665E 45 2126082818 258N1657E 40 2126082900 264N1658E 40 2126082906 282N1657E 40 2126082912 300N1654E 35 2126082918 307N1650E 40 2126083000 309N1647E 30 2126083006 308N1653E 30 2126083012 311N1660E 30 2126083018 317N1668E 30 NNNN

Severity

Extreme (5/5)

This month

6th Natural disaster alert at severity 5+ in the last 30 days