WDPN32 PGTW 261500 MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC// SUBJ/PROGNOSTIC REASONING FOR TROPICAL STORM 07W WARNING NR 21// RMKS/ 1. FOR METEOROLOGISTS. 2. PROGNOSTIC REASONING FOR 261200Z TO 271200Z JUL 2005. A. TROPICAL STORM (TS) 07W (BANYAN), LOCATED APPROXIMATELY 60 NM SOUTHEAST OF TOKYO, HAS TRACKED NORTHEASTWARD AT 22 KNOTS OVER THE PAST SIX HOURS. A 261136Z SSM/I IMAGE SHOWS A BROAD AREA OF COOL, DRY AIR INTRUDING FROM THE WEST. B. TS 07W IS TRACKING NORTHEASTWARD ALONG THE NORTHWESTERN PERI- PHERY OF THE MID-LEVEL STEERING RIDGE LOCATED TO THE EAST. INTER- ACTION WITH THE MID-LATITUDE TROUGH PROPAGATING EASTWARD ACROSS THE SEA OF JAPAN HAS ACCELERATED THE TRANSITION OF TS 07W TO AN EXTRA- TROPICAL CYCLONE OVER THE PAST 12 HOURS. THIS TRANSITION IS FORECAST TO BE COMPLETE BY TAU 24. THE AVAILABLE DYNAMIC AIDS CONSISTING OF NOGAPS, COAMPS, GFDN, NCEP GFS, AFWA MM5, UKMET EGRR, TCLAPS, JGSM, JYTM AND WBAR ARE IN FAIR AGREEMENT WITH THIS SCENARIO. THIS FORECAST IS BASED UPON A CONSENSUS OF ALL AVAILABLE DYNAMIC AIDS. C. TS 07W WILL GRADUALLY WEAKEN AS IT ENCOUNTERS COOLER SEA SUR- FACE TEMPERATURES AND CONTINUES TO INTERACT WITH THE BAROCLINIC ZONE ASSOCIATED WITH THE SHORTWAVE TROUGH IN THE SEA OF JAPAN. 3. FORECAST TEAM: BRAVO// NNNN