THE AREA OF CONVECTION (INVEST 93W) PREVIOUSLY LOCATED NEAR
12.3N 123.5E HAS DISSIPATED AND IS NO LONGER SUSPECT FOR THE DEVELOPMENT
OF A SIGNIFICANT TROPICAL CYCLONE IN THE NEXT 24 HOURS.
WTPN21 PGTW 061830
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT (INVEST 93W) CANCELLATION//
REF/A/JOINT TYPHOON WRNCEN PEARL HARBOR HI/051851ZDEC2025//
AMPN/REF IS TROPICAL CYCLONE FORMATION ALERT//
RMKS/
1. REMARKS: THIS CANCELS REF A (WTPN21 PGTW 051900).THE AREA OF
CONVECTION PREVIOUSLY LOCATED NEAR 12.0N 125.8E IS NOW LOCATED NEAR
12.3N 125.2E, APPROXIMATELY 97 NM EAST-SOUTHEAST OF LEGAZPI.ANIMATED
ENHANCED INFRARED SATELLITE IMAGERY (EIR) DEPICTS A FULLY EXPOSED AND
RAGGED LOW-LEVEL CIRCULATION CENTER (LLCC) WITH WEAKENED CONVECTION
DISPLACED WEST OF THE LLCC. ANALYSIS OF THE ENVIRONMENT INDICATES THE
SYSTEM HAS DRIFTED INTO AN AREA OF HIGH VERTICAL WIND SHEAR (25-30 KTS).
SEA SURFACE TEMPERATURES REMAIN WARM (29-30 C). DRY AIR ENTRAINMENT CAN
BE ANALYZED TO THE EAST OF 93W. ADDITIONALLY, THE LLCC IS APPROACHING
LAND, RESULTING IN INCREASED FRICTIONAL EFFECTS ON THE CIRCULATION.
GLOBAL DETERMINISTIC MODELS AND ENSEMBLES ARE IN GOOD AGREEMENT THAT 93W
WILL CROSS OVER THE PHILIPPINES, BUT WILL STRUGGLE TO CONSOLIDATE AS IT
INTERACTS WITH THE COLD SURGE ONCE IT MOVES INTO THE SOUTH CHINA SEA.
MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 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 IS DOWNGRADED TO MEDIUM.
//
NNNN
WTPN21 PGTW 051900
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT (INVEST 93W)//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
160 NM EITHER SIDE OF A LINE FROM 12.0N 126.2E TO 11.0N 116.7E
WITHIN THE NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY
ISSUANCE OF NUMBERED TROPICAL CYCLONE WARNINGS AT THIS TIME.
WINDS IN THE AREA ARE ESTIMATED TO BE 18 TO 23 KNOTS. METSAT
IMAGERY AT 051800Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 11.9N 126.1E. THE SYSTEM IS MOVING NORTHWESTWARD AT 04
KNOTS.
2. REMARKS:THE AREA OF CONVECTION (INVEST 93W) PREVIOUSLY LOCATED NEAR
11.4N 127.2E IS NOW LOCATED NEAR 11.9N 126.1E, APPROXIMATELY 156 NM
EAST-SOUTHEAST OF LEGAZPI. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY
(EIR) DEPICTS DEEP CONVECTION BUILDING NEAR THE CONSOLIDATING LOW LEVEL
CIRCULATION CENTER (LLCC). A 051346Z ASCAT REVEALS 15-20 KNOT WINDS
STARTING TO CONSOLIDATE ALONG THE WESTERN PERIPHERY. ENVIRONMENTAL
ANALYSIS FOR THE AREA INDICATES MARGINALLY FAVORABLE ENVIRONMENT WITH
HIGH VERTICAL WIND SHEAR (20-30 KTS), WARM SEA SURFACE TEMPERATURES (29-
30 C), AND GOOD POLEWARD OUTFLOW ALOFT. GLOBAL DETERMINISTIC MODELS ARE
IN GOOD AGREEMENT THAT 93W WILL MOVE WEST OVER THE PHILIPPINES. GLOBAL
ENSEMBLE MODELS ARE IN GOOD AGREEMENT THAT 93W WILL MOVE WEST OVER THE
PHILIPPINES, WITH ECENS SHOWING A HIGHER INTENSITY BETWEEN THE TWO
MODELS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 KNOTS.
MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1004 MB. MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 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
IS HIGH.
3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY
061900Z.//
NNNN
THE AREA OF CONVECTION (INVEST 93W) PREVIOUSLY LOCATED NEAR
14.0N 135.3E IS NOW LOCATED NEAR 14.2N 134.4E, APPROXIMATELY 621 NM EAST
OF LEGAZPI. ANIMATED ENHANCED MULTISPECTRAL IMAGERY (MSI) DEPICTS A
CONSOLIDATING LOW LEVEL CIRCULATION (LLCC) WITH PERSISTENT DEEP
CONVECTION. ENVIRONMENTAL ANALYSIS FOR THE AREA INDICATES FAVORABLE
CONDITIONS FOR DEVELOPMENT WITH LOW VERTICAL WIND SHEAR (10-15 KTS),
WARM SEA SURFACE TEMPERATURES (29-30 C), AND GOOD POLEWARD OUTFLOW
ALOFT. GLOBAL DETERMINISTIC MODELS ARE IN GOOD AGREEMENT THAT 93W WILL
CONTINUE TO MOVE WEST OVER THE PHILIPPINES WITH GFS SHOWING A MORE
AGGRESSIVE INTENSIFICATION. GLOBAL ENSEMBLES HAVE 93W MOVING
SOUTHWESTWARD AND ECENS SHOWING HIGHER INTENSIFICATION THAN GEFS.
MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 13 TO 18 KNOTS. MINIMUM
SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1008 MB. THE POTENTIAL FOR
THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS IS UPGRADED TO MEDIUM.