WTPN31 PGTW 010300 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL DEPRESSION 06W (SONGDA) WARNING NR 013// RMKS/ 1. TROPICAL DEPRESSION 06W (SONGDA) WARNING NR 013 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 010000Z --- NEAR 35.4N 123.2E MOVEMENT PAST SIX HOURS - 020 DEGREES AT 05 KTS POSITION ACCURATE TO WITHIN 030 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 35.4N 123.2E --- FORECASTS: 12 HRS, VALID AT: 011200Z --- 36.2N 123.8E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 030 DEG/ 07 KTS --- 24 HRS, VALID AT: 020000Z --- 37.4N 124.7E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 010300Z POSITION NEAR 35.6N 123.4E. 01AUG22. TROPICAL DEPRESSION (TD) 06W (SONGDA), LOCATED APPROXIMATELY 168 NM WEST OF KUNSAN AB, HAS TRACKED NORTH-NORTHEASTWARD AT 05 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS A FULLY-EXPOSED, DEFINED LOW-LEVEL CIRCULATION (LLC) WITH NO ASSOCIATED DEEP CONVECTION. THEREFORE THERE IS HIGH CONFIDENCE IN THE INITIAL POSITION. A 312306Z SSMIS 91GHZ COLOR COMPOSITE MICROWAVE IMAGE SHOWS SHALLOW BANDING WRAPPING AROUND A BROAD, WEAKENING CENTER. THE INITIAL INTENSITY IS ASSESSED AT 25 KNOTS WITH MEDIUM CONFIDENCE. TD 06W IS LOCATED UNDER STRONG SOUTHWESTERLY FLOW ALOFT ASSOCIATED WITH AN UPPER-LEVEL TROUGH POSITIONED OVER THE GULF OF POHAI. THIS UNFAVORABLE ENVIRONMENT IS DOMINATED BY CONVERGENCE ALOFT, MODERATE TO HIGH VERTICAL WIND SHEAR AND SIGNIFICANT DRY AIR. THESE CONDITIONS WILL PERSIST THROUGH THE FORECAST PERIOD WITH STEADY WEAKENING EXPECTED AND DISSIPATION LIKELY BY TAU 12. THERE IS SOME UNCERTAINTY IN THE EXACT FORECAST TRACK WITH TD 07W LOCATED ABOUT 250NM SOUTHEAST OF TD 06W'S INITIAL POSITION. THUS BINARY INTERACTION COULD OCCUR AS TD 07W GETS ABSORBED IN THE SOUTHEASTERN PERIPHERY OF TD 06W. 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. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 010000Z IS 10 FEET. REFER TO TROPICAL DEPRESSION 07W (TRASES) WARNINGS (WTPN32 PGTW) FOR SIX- HOURLY UPDATES.// NNNN