WPAC: INVEST 91W

[Hayabusa]

91W.INVEST

[Hayabusa]

ABPW10 PGTW 061530
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS REISSUED/061530Z-070600ZOCT2020//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/061351ZOCT2020//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
B. TROPICAL DISTURBANCE SUMMARY:
(1) AN AREA OF CONVECTION (INVEST 91W) HAS PERSISTED NEAR
12.3N 111.6E, APPROXIMATELY 295 NM SOUTHEAST OF DANANG, VIETNAM.
ANIMATED ENHANCED INFRARED SATELLITE IMAGERY AND A 060941Z SSMIS
91GHZ IMAGE REVEAL A BROAD LOW LEVEL CIRCULATION WITH WEAK FORMATIVE
BANDING IN THE NORTHERN SEMICIRCLE. INVEST 91W IS CURRENTLY IN A
MARGINALLY FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH BROAD UPPER
LEVEL DIFFLUENCE, LOW (<15KTS) VERTICAL WIND SHEAR, AND WARM (29-
30C) SEA SURFACE TEMPERATURES; HOWEVER, GLOBAL MODELS INDICATE
INVEST 91W WILL CONTINUE TO TRACK WESTWARD AND CONSOLIDATE SLIGHTLY
BEFORE MAKING LANDFALL IN 12-18 HOURS. MAXIMUM SUSTAINED SURFACE
WINDS ARE ESTIMATED AT 10 TO 15 KNOTS. MINIMUM SEA LEVEL PRESSURE IS
ESTIMATED TO BE NEAR 1004 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS LOW.

WWJP27 RJTD 061800
WARNING AND SUMMARY 061800.
WARNING VALID 071800.
WARNING IS UPDATED EVERY 6 HOURS.
LOW PRESSURE AREA 1006 HPA NEAR 12N 113E WEST SLOWLY.

[euro6208]

THE AREA OF CONVECTION (INVEST 91W) PREVIOUSLY LOCATED
NEAR 12.3N 111.6E IS NOW LOCATED NEAR 12.5N 110.7E, APPROXIMATELY
257 NM SOUTHEAST OF DANANG, VIETNAM. ANIMATED ENHANCED INFRARED
SATELLITE IMAGERY AND A 062308Z SSMIS 91GHZ IMAGE REVEAL A BROAD LOW
LEVEL CIRCULATION WITH FRAGMENTED FORMATIVE BANDING IN THE NORTHERN
AND SOUTHERN SEMICIRCLES. A 070146Z ASCAT-B IMAGE REVEALS A BROAD
CIRCULATION OF 10-15KTS WITH SOME ISOLATED 25KT WINDS DISPLACED TO
THE NORTH. INVEST 91W IS IN A MARGINAL ENVIRONMENT AND IS EMBEDDED
IN STRONG EASTERLY UPPER LEVEL FLOW WITH MODERATE TO STRONG (20-
30KTS) VERTICAL WIND SHEAR. INVEST 91W IS CURRENTLY MAKING LANDFALL
AND GLOBAL MODELS INDICATE IT WILL CONTINUE TO TRACK WESTWARD OVER
SOUTHEAST ASIA. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 12
TO 18 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1005
MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL
CYCLONE WITHIN THE NEXT 24 HOURS REMAINS LOW.

[Hayabusa]

ABPW10 PGTW 071530
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS REISSUED/071530Z-080600ZOCT2020//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/071351ZOCT2020//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
B. TROPICAL DISTURBANCE SUMMARY:
(1) THE AREA OF CONVECTION (INVEST 91W) PREVIOUSLY LOCATED
NEAR 12.5N 110.7E HAS DISSIPATED AND IS NO LONGER SUSPECT FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE IN THE NEXT 24 HOURS.