FNMOC於13：50撤編，終究不敵副高強勢

JTWC16/1500Z取消評級

ABPW10 PGTW 161500
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS REISSUED/161500Z-170600ZAUG2020//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 97W) PREVIOUSLY LOCATED
NEAR 9.7N 165.5E HAS DISSIPATED AND IS NO LONGER SUSPECT FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE IN THE NEXT 24 HOURS.

JTWC 1500Z 撤評

(1) THE AREA OF CONVECTION (INVEST 97W) PREVIOUSLY LOCATED
NEAR 9.7N 165.5E HAS DISSIPATED AND IS NO LONGER SUSPECT FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE IN THE NEXT 24 HOURS.

JTWC0600Z降評Low

(1) THE AREA OF CONVECTION (INVEST 97W) PREVIOUSLY LOCATED
NEAR 8.5N 173.2E IS NOW LOCATED NEAR 9.7N 165.5E, APPROXIMATELY 139
NM NORTHWEST OF KWAJALEIN ATOLL. ANIMATED ENHANCED INFRARED
SATELLITE IMAGERY AND A 152306Z GMI 89GHZ MICROWAVE IMAGE DEPICT A
BROAD LOW LEVEL CIRCULATION WITH SOME SHALLOW BANDING AND SCATTERED
FLARING CONVECTION. A 152255Z ASCAT-C IMAGE REVEALS THE ELONGATED
CIRCULATION WITH SOME 15KT EASTERLY WINDS PRESENT IN THE NORTHERN
SEMICIRCLE AND 5-10KT WINDS ELSEWHERE. THE ENVIRONMENT IS FAVORABLE
FOR FURTHER DEVELOPMENT WITH WARM (29-30C) SEA SURFACE TEMPERATURES,
LOW (<15KTS) VERTICAL WIND SHEAR, AND GOOD POLEWARD OUTFLOW;
HOWEVER, THE WIND FIELD HAS BROADENED AND CONTINUES TO LACK STRONG
WESTERLIES. NO GLOBAL MODELS INDICATE SIGNIFICANT DEVELOPMENT OF
THIS SYSTEM AS IT CONTINUES TO TRACK WEST-NORTHWESTWARD. MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 10 TO 15 KNOTS. MINIMUM SEA
LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1007 MB. THE POTENTIAL FOR
THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS IS DOWNGRADED TO LOW.

JTWC1500Z提升評級至Medium,GFS目前轉而較不看好其發展

(1) THE AREA OF CONVECTION (INVEST 97W) PREVIOUSLY LOCATED
NEAR 8.3N 178.8E IS NOW LOCATED NEAR 8.2N 177.2E, APPROXIMATELY
564 NM EAST OF KWAJALEIN ATOLL. ANIMATED ENHANCED INFRARED (EIR)
SATELLITE IMAGERY DEPICTS AN AREA OF WEAK, DISORGANIZED
CONVECTION OVER THE WESTERN PORTION OF A BROAD LOW LEVEL
CIRCULATION. A COMBINATION OF PARTIAL ASCAT PASSES AT 140832Z
(ASCAT-A) AND 140947Z (ASCAT-B) DEPICTS A BROAD AREA OF WEAK
(10-15 KTS) LOW LEVEL WINDS WRAPPING AROUND AN ELONGATED LOW
LEVEL CIRCULATION. STRONGER 20-25 KTS WINDS ASSOCIATED WITH THE
GRADIENT FLOW ARE DISPLACED 60+ NM TO THE NORTH. THE ENVIRONMENT
IS FAVORABLE FOR FURTHER DEVELOPMENT WITH WARM (29-30 CELSIUS)
SEA SURFACE TEMPERATURES AND LOW (10-15 KTS) VERTICAL WIND SHEAR,
HOWEVER UPPER LEVEL OUTFLOW REMAINS WEAK. NUMERICAL MODELS ARE
IN AGREEMENT THAT THE SYSTEM WILL CONTINUE TO TRACK WEST THROUGH
THE NEXT 24 HOURS, HOWEVER NUMERICAL MODEL INTENSITY GUIDANCE IS
IN OVERALL POOR AGREEMENT.  MAXIMUM SUSTAINED SURFACE WINDS ARE
ESTIMATED AT 10 TO 15 KNOTS. MINIMUM SEA LEVEL PRESSURE IS
ESTIMATED TO BE NEAR 1007 MB. THE POTENTIAL FOR THE DEVELOPMENT
OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS
UPGRADED TO MEDIUM.

tropicaltidbits網站電腦模擬不看好