TXPQ25 KNES 260348
TCSWNP
A. 07W (MEARI)
B. 26/0301Z
C. 36.4N
D. 123.5E
E. THREE/MTSAT
F. EXTRATROPICAL
G. IR/EIR/VIS
H. REMARKS...SYSTEM IS RAPIDLY ACCELERATING AND WHAT LITTLE CONVECTION
REMAINS IS POLEWARD AND EASTWARD OF THE CENTER...BOTH CHARACTERISTICS
OF EXTRATROPICAL TRANSITION. THIS WILL BE THE FINAL BULLETIN.
I. ADDL POSITIONS
NIL
...TURK
Latest prognostic reasonings:
WTPQ31 RJTD 260000
RSMC TROPICAL CYCLONE PROGNOSTIC REASONING
REASONING NO. 9 FOR STS 1105 MEARI (1105)
1.GENERAL COMMENTS
REASONING OF PROGNOSIS THIS TIME IS SIMILAR TO PREVIOUS ONE.
POSITION FORECAST IS MAINLY BASED ON NWP AND PERSISTENCY.
2.SYNOPTIC SITUATION
NOTHING PARTICULAR TO EXPLAIN.
3.MOTION FORECAST
POSITION ACCURACY AT 260000 UTC IS FAIR.
STS WILL DECELERATE FOR THE NEXT 48 HOURS.
STS WILL MOVE NORTH-NORTHWEST FOR THE NEXT 12 HOURS THEN MOVE TO NORTHEAST.
4.INTENSITY FORECAST
STS WILL BE GRADED DOWN TO TS WITHIN 12 HOURS.
STS WILL WEAKEN BECAUSE CYCLONE WILL CONTINUE TO STAY IN LOW SST AREA
FI-NUMBER WILL BE 2.0 AFTER 24 HOURS.
STS WILL BE TRANSFORMED TO EXTRATROPICAL CYCLONE WITHIN 48 HOURS.=
WDPN32 PGTW 260300
MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC//
SUBJ/PROGNOSTIC REASONING FOR TROPICAL STORM 07W (MEARI)//
/WARNING NR 18//
RMKS/
1. FOR METEOROLOGISTS.
2. 12 HOUR SUMMARY AND ANALYSIS.
A. TROPICAL STORM 07W (MEARI), LOCATED APPROXIMATELY 190 NM
SOUTHWEST OF SEOUL, SOUTH KOREA, HAS TRACKED NORTHWARD AT 30 KNOTS
OVER THE PAST SIX HOURS. RECENT MULTISPECTRAL IMAGERY SHOWS A VERY
WELL DEFINED CIRCULATION THAT IS DEVOID OF DEEP CONVECTION. ANIMATED
WATER VAPOR IMAGERY SHOWS AN UPPER LEVEL LOW HAS MOVED INTO THE
REGION FROM THE WEST. THE SUBSIDENCE OF THIS UPPER LEVEL LOW, ALONG
WITH UNFAVORABLE SEA SURFACE TEMPERATURES AROUND TS 07W, ARE
SUPPRESSING THE DEVELOPMENT OF DEEP CONVECTION. THE SYSTEM IS
CURRENTLY TRACKING ALONG THE NORTHWESTERN PERIPHERY OF THE
SUBTROPICAL RIDGE (STR) LOCATED TO THE SOUTHEAST. POSITION IS BASED
ON THE FIX FROM PGTW AND FROM ANIMATED RADAR DATA FROM SOUTH KOREA.
INTENSITY IS BASED ON LOCAL SHORE OBSERVATIONS AND A PREVIOUS
251324Z ASCAT PASS.
3. FORECAST REASONING.
A. THERE IS NO CHANGE IN FORECAST PHILOSOPHY.
B. TS MEARI WILL CONTINUE TO ACCELERATE NORTHWARD ALONG THE
WESTERN SIDE OF THE STR FOR THE NEXT 12 HOURS BEFORE TURNING
NORTHEASTERLY AS AN APPROACHING MIDLATITUDE TROUGH LIFTS THE SYSTEM
INTO THE BAROCLINIC WESTERLIES. TS 07W WILL CONTINUE TO WEAKEN IN
THE COLD WATERS OF THE YELLOW SEA AND THEN WILL QUICKLY DISSIPATE
OVER THE ROUGH TERRAIN OF NORTH KOREA AND MANCHURIA. NUMERICAL MODEL
GUIDANCE IS IN EXCELLENT AGREEMENT WITH ALL MEMBERS OF CONSENSUS
GROUPED TOGETHER IN A VERY TIGHT PACKING.//
NNNN
Latest advisories:
WTPQ21 RJTD 260300
RSMC TROPICAL CYCLONE ADVISORY
NAME STS 1105 MEARI (1105)
ANALYSIS
PSTN 260300UTC 36.2N 123.8E GOOD
MOVE NNW 27KT
PRES 985HPA
MXWD 050KT
GUST 070KT
30KT 350NM SOUTHEAST 210NM NORTHWEST
FORECAST
24HF 270300UTC 40.0N 123.7E 85NM 70%
MOVE NNE 09KT
PRES 994HPA
MXWD 035KT
GUST 050KT
45HF 280000UTC 42.0N 127.9E 160NM 70% EXTRATROPICAL LOW =
WTKO20 RKSL 260200
KMA TROPICAL CYCLONE ADVISORY NO. 21
NAME STS 1105 MEARI
ANALYSIS
POSITION 260200UTC 36.0N 124.2E
MOVEMENT N 24KT
PRES/VMAX 985HPA 52KT
FORECAST
06HR
POSITION 260800UTC 38.2N 124.3E WITHIN 40NM
PRES/VMAX 985HPA 52KT
12HR
POSITION 261400UTC 39.7N 124.9E WITHIN 55NM
PRES/VMAX 985HPA 52KT
18HR
POSITION 262000UTC 40.6N 125.7E WITHIN 75NM
PRES/VMAX 988HPA 49KT
24HR
POSITION 270200UTC 41.5N 126.6E WITHIN 80NM
PRES/VMAX 990HPA 47KT
KOREA METEOROLOGICAL ADMINISTRATION.
South Korea radar:
