Haitang means The Chinese flowering crabapple.
submitted by china...
WTPN32 PGTW 242100
MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL DEPRESSION 21W (TWENTY-ONE) WARNING NR 002
02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
241800Z --- NEAR 15.9N 113.0E
MOVEMENT PAST SIX HOURS - 055 DEGREES AT 08 KTS
POSITION ACCURATE TO WITHIN 060 NM
POSITION BASED ON CENTER LOCATED BY A COMBINATION OF
SATELLITE AND SYNOPTIC DATA
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
REPEAT POSIT: 15.9N 113.0E
---
FORECASTS:
12 HRS, VALID AT:
250600Z --- 16.4N 113.0E
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 24 HR POSIT: 300 DEG/ 06 KTS
---
24 HRS, VALID AT:
251800Z --- 17.0N 112.0E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 36 HR POSIT: 285 DEG/ 08 KTS
---
36 HRS, VALID AT:
260600Z --- 17.4N 110.4E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 48 HR POSIT: 280 DEG/ 08 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
261800Z --- 17.7N 108.7E
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 72 HR POSIT: 285 DEG/ 10 KTS
---
72 HRS, VALID AT:
271800Z --- 18.6N 104.7E
MAX SUSTAINED WINDS - 015 KT, GUSTS 025 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
---
REMARKS:
242100Z POSITION NEAR 16.0N 113.0E.
TROPICAL DEPRESSION (TD) 21W, LOCATED APPROXIMATELY 310 NM EAST OF
HUE, VIETNAM, HAS TRACKED NORTHEASTWARD AT 08 KNOTS OVER THE PAST
SIX HOURS. ANIMATED INFRARED SATELLITE IMAGERY SHOWS A BROAD AND
DISORGANIZED SYSTEM WITH A PARTLY EXPOSED LOW LEVEL CIRCULATION
CENTER. DEEP CONVECTION EXISTS IN THE CONVERGENT SOUTHWESTERLIES
OVER THE SOUTHWEST QUADRANT. A 241808Z AMSRE IMAGE, HOWEVER, SHOWS
THAT THE CONVECTIVE BANDING IS BETTER ORGANIZED THAN THE SATELLITE
IMAGERY INDICATES. ANIMATED WATER VAPOR IMAGERY REVEALS EXCELLENT
EQUATORWARD OUTFLOW. THE 241200Z PGTW UPPER LEVEL STREAMLINE
ANALYSIS DEPICTS AN ANTICYCLONE BETWEEN TAIWAN AND LUZON, WHICH IS
PRODUCING 15 TO 20 KNOTS OF VERTICAL WIND SHEAR OVER THE SYSTEM. THE
SHEAR IS BEING COMPENSATED SOMEWHAT BY THE HIGHLY DIFFLUENT FLOW OUT
OF THE SOUTHWEST QUADRANT OF THE ANTICYCLONE. AMSUB RADIAL CROSS
SECTIONS REVEAL A WEAK AND LOW WARM ANOMALY. SEA SURFACE TEMPERATURE
IN THE AREA IS 31 DEGREES. THE CURRENT INTENSITY IS BASED ON A
241458Z OCEANSAT IMAGE AND SHIP REPORTS IN THE VICINITY OF THE
SYSTEM. TD 21W ORIGINATED IN THE MONSOON TROUGH AND IS SITUATED
WITHIN A WEAK STEERING ENVIRONMENT. IT IS EXPECTED TO DRIFT
NORTHEASTWARD THROUGH THE NEAR TERM BUT SHOULD BEGIN TO REVERSE
COURSE AND TRACK WESTWARD AS THE LOW-LEVEL SUBTROPICAL RIDGE RE-
BUILDS OVER EASTERN CHINA AND SURGES INTO THE GULF OF TONKIN. MODEL
GUIDANCE IS LIMITED, BUT THERE IS CONSISTENT AGREEMENT WITH A TRACK
INTO NORTHERN VIETNAM. INTENSIFICATION WILL BE LIMITED DUE TO THE
MODERATE VERTICAL WIND SHEAR, THUS TD 21W IS EXPECTED TO REMAIN NEAR
ITS CURRENT INTENSITY UNTIL IT MAKES LANDFALL. MAXIMUM SIGNIFICANT
WAVE HEIGHT AT 241800Z IS 10 FEET. NEXT WARNINGS AT 250300Z,
250900Z, 251500Z AND 252100Z. REFER TO TROPICAL STORM 20W (NESAT)
WARNINGS (WTPN31 PGTW)FOR SIX-HOURLY UPDATES.//
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![Image](http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/wp2111.gif)