WPAC: LINGLING - Tropical Storm

[Hayabusa]

92W INVEST 250816 1200 19.4N 125.3E WPAC 15 0

[Hayabusa]

ABPW10 PGTW 170000
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH
PACIFIC OCEANS REISSUED/170000Z-170600ZAUG2025//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
A. TROPICAL CYCLONE SUMMARY: NONE.
B. TROPICAL DISTURBANCE SUMMARY:
(1) AN AREA OF CONVECTION (INVEST 92W) HAS PERSISTED NEAR 19.8N
125.1E, APPROXIMATELY 320 NM SOUTH OF KADENA. ANIMATED MULTISPECTRAL
SATELLITE IMAGERY (MSI) DEPICTS THE DISORGANIZED LOW LEVEL CIRCULATION
(LLC) WITH FLARING CONVECTION FROM THE SOUTHEAST. 92W IS STARTING TO
FORM WITHIN THE TROUGHING THAT CURRENTLY EXTENDS INTO THE LUZON STRAIT.
ENVIRONMENTAL ANALYSIS FOR THE AREA INDICATES MARGINALLY FAVORABLE
CONDITIONS FOR DEVELOPMENT WITH MODERATE VERTICAL WIND SHEAR (20 KTS)
OFFSET BY WARM SEA SURFACE TEMPERATURES (30 C) AND MODERATE EQUATORWARD
OUTFLOW ALOFT. GLOBAL MODELS ARE IN GOOD AGREEMENT THAT 92W WILL TRACK
NORTHWARD OVER THE NEXT 24 TO 48 HOURS. HOWEVER, MODELS ARE MIXED
REGARDING THE RATE OF INTENSIFICATION FOR 92W. ECENS AND GEFS ENSEMBLE
GUIDANCE SHOW A FAIR AGREEMENT THAT 92W WILL DEVELOP, BUT WITH THE ECENS
MODEL BEING MORE AGGRESSIVE THAN THE 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 LOW.
(2) NO OTHER SUSPECT AREAS.
C. SUBTROPICAL SYSTEM SUMMARY: NONE.
2. SOUTH PACIFIC AREA (WEST COAST OF SOUTH AMERICA TO 135 EAST):
A. TROPICAL CYCLONE SUMMARY: NONE.
B. TROPICAL DISTURBANCE SUMMARY: NONE.
C. SUBTROPICAL SYSTEM SUMMARY: NONE.
3. JUSTIFICATION FOR REISSUE: ADDED LOW AREA IN PARA. 1. B. (1).//
NNNN

[Hayabusa]

up to medium

ABPW10 PGTW 170600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH
PACIFIC OCEANS/170600Z-180600ZAUG2025//
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 92W) PREVIOUSLY LOCATED NEAR
20.3N 126.5E IS NOW LOCATED NEAR 21.2N 127.7E, APPROXIMATELY 306 NM
SOUTH OF KADENA AFB. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI)
AS WELL AS A 170419Z ATMS 88.2 GHZ IMAGE DEPICTS A SLOWLY
CONSOLIDATING AND HIGHLY ELONGATED LOW LEVEL CIRCULATION (LLC),
EMBEDDED WITHIN A REVERSE ORIENTED MONSOON TROF. FLARING CONVECTION
IS FORMING ALONG THE SOUTHEASTERN FLANK OF THE LLC IN THE CONVERGENT
FLOW SOUTH OF THE TROF AXIS. ANIMATED WATER VAPOR IMAGERY INDICATES A
TUTT-CELL POSITIONED APPROXIMATELY 200NM NORTHEAST OF 92W, WHICH IS
IMPARTING NORTHERLY SHEAR OVER 92W AND DRAWING IN DRY MID-LEVEL
ACROSS THE REGION TO THE NORTH OF THE LLC. ENVIRONMENTAL ANALYSIS FOR
THE AREA INDICATES MARGINALLY FAVORABLE CONDITIONS FOR DEVELOPMENT
WITH MODERATE NORTHERLY VERTICAL WIND SHEAR (20 KTS) AND DRY MID-
LEVEL AIR TO THE NORTH, OFFSET BY WARM SEA SURFACE TEMPERATURES (30
C) AND MODERATE EQUATORWARD OUTFLOW ALOFT. GLOBAL MODELS ARE IN GOOD
AGREEMENT THAT 92W WILL TRACK NORTHWARD OVER THE NEXT 24 TO 48 HOURS.
GLOBAL MODELS ARE ALSO IN AGREEMENT THAT 92W WILL VERY SLOWLY
CONSOLIDATE AND ONLY MINIMALLY INTENSIFY OVER THE NEXT COUPLE OF
DAYS, HINDERED BY PERSISTENT DRY AIR AND MODERATE SHEAR 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.
(2) AN AREA OF CONVECTION (INVEST 91W) HAS PERSISTED NEAR 17.3N
111.0E, APPROXIMATELY 165 NM SOUTH-SOUTHEAST OF HAIKOU, CHINA. THE
SYSTEM IS CURRENTLY CLASSIFIED AS A MONSOON DEPRESSION, GENERALLY
CHARACTERIZED AS A LARGE CYCLONIC CIRCULATION, GREATER THAN 600NM
DIAMETER, WITH HIGHER WINDS OVER THE EASTERN PERIPHERY AND A WEAK
CORE OF LIGHT WINDS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI)
AS WELL AS A 180212Z METOP-C 89 GHZ MICROWAVE IMAGE INDICATE A VERY
BROAD CIRCULATION WITH FRAGMENTED CONVECTIVE BANDING ALONG THE
EASTERN PERIPHERY OF THE CIRCULATION. A 170216Z PARTIAL ASCAT PASS
REVEALS 25 KT WINDS ALONG THE CHINESE COAST TO THE EAST OF HAINAN,
WITH A RADIUS OF MAXIMUM WINDS OF AT LEAST 200NM. THE ASCAT AS WELL
AS THE MSI SUGGEST POCKETS OF ENHANCED ROTATION AND VORTICITY ALONG
WITH ISOLATED AREAS OF ELEVATED WINDS, IN THE NORTHEASTERN CORNER OF
THE CIRCULATION, WRAPPING UP THE EASTERN PERIPHERY. ENVIRONMENTAL
FACTORS FOR THIS SYSTEM ARE MODERATELY UNFAVORABLE WITH MODERATE
UPPER LEVEL VWS (20KTS) AS WELL AS A LACK OF POLEWARD OUTFLOW ALOFT,
OFFSET BY WARM SSTS OF (28-29C). GLOBAL DETERMINISTIC MODELS ARE
CURRENTLY IN AGREEMENT THAT THE AREA OF CONVECTION 91W WILL NOT
CONSOLIDATE AND CONTINUE A SLUGGISH NORTH-NORTHWESTERLY TRACK TOWARDS
HAINAN ISLAND OVER THE NEXT 24 HOURS. FOR HAZARDS AND WARNINGS,
REFERENCE THE FLEET WEATHER CENTER SAN DIEGO HIGH WINDS AND SEAS
PRODUCT OR REFER TO LOCAL WMO DESIGNATED FORECAST AUTHORITY MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 23 TO 28 KNOTS. MINIMUM SEA
LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1002 MB. THE POTENTIAL FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS IS LOW.
(3) NO OTHER SUSPECT AREAS.
C. SUBTROPICAL SYSTEM SUMMARY: NONE.
2. SOUTH PACIFIC AREA (WEST COAST OF SOUTH AMERICA TO 135 EAST):
A. TROPICAL CYCLONE SUMMARY: NONE.
B. TROPICAL DISTURBANCE SUMMARY: NONE.
C. SUBTROPICAL SYSTEM SUMMARY: NONE.//
NNNN

[Hayabusa]

JMA 06Z TD

WWJP27 RJTD 170600
WARNING AND SUMMARY 170600.
WARNING VALID 180600.
WARNING IS UPDATED EVERY 6 HOURS.
TROPICAL DEPRESSION 1008 HPA AT 21N 127E NORTH SLOWLY.

[Hayabusa]

TCFA

ABPW10 PGTW 171430
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH
PACIFIC OCEANS REISSUED/171430Z-180600ZAUG2025//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/171421ZAUG2025//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.//
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 92W) PREVIOUSLY LOCATED NEAR
21.2N 127.7E IS NOW LOCATED NEAR 21.5N 127.1E, APPROXIMATELY 283 NM
SOUTH OF KADENA AFB. ANIMATED ENHANCED INFRARED (EIR) SATELLITE
IMAGERY DEPICTS A QUICKLY CONSOLIDATING AND A PARTIALLY EXPOSED LOW
LEVEL CIRCULATION CENTER (LLCC), EMBEDDED WITHIN A REVERSE ORIENTED
MONSOON TROF. FLARING CONVECTION ALONG THE EASTERN PERIPHERY OF THE
CIRCULATION HAS BEGUN TO CONSOLIDATE INTO FORMATIVE BANDING. A 171235Z
ASCAT-B PASS SHOWED A FORMATIVE LLCC TO THE WEST OF AN EXTENSIVE
REGION OF 20-25 KNOT WINDS EXTENDING ALONG THE ENTIRE EASTERN HALF OF
THE CIRCULATION, WITH SOME EMBEDDED WINDS OF 30 KNOTS ISOLATED IN THE
NORTHEASTERN QUADRANT. ANIMATED WATER VAPOR IMAGERY INDICATES A TUTT-
CELL POSITIONED APPROXIMATELY 200NM NORTH OF 92W, WHICH HAS BEGUN TO
ENHANCE THE POLEWARD OUTFLOW, AND SUPPORTING CONVECTIVE DEVELOPMENT IN
AND AROUND THE LLCC. ENVIRONMENTAL ANALYSIS FOR THE AREA INDICATES
FAVORABLE CONDITIONS FOR DEVELOPMENT WITH LOW VERTICAL WIND SHEAR (5-
10 KTS), WARM SEA SURFACE TEMPERATURES (30 C) AND GOOD POLEWARD
OUTFLOW ALOFT ONLY OFFSET BY DRY MID-LEVEL AIR TO THE NORTH DUE TO THE
AFOREMENTIONED TUTT CELL. GLOBAL MODELS ARE IN GOOD AGREEMENT THAT 92W
WILL TRACK NORTHWARD AND SLOWLY INTENSIFY OVER THE NEXT 24 HOURS.
MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 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 HIGH.

[Hayabusa]

TD a
Issued at 2025/08/18 01:25 UTC
Analysis at 08/18 00 UTC
Grade TD
Scale -
Intensity -
Center position N22°10′ (22.2°)
E126°25′ (126.4°)
Direction and speed of movement NNE Slow
Central pressure 1008 hPa
Maximum sustained wind speed near center 15 m/s (30 kt)
Maximum wind gust speed 23 m/s (45 kt)
Forecast for 08/18 12 UTC
Grade TS
Intensity -
Center position of probability circle N24°05′ (24.1°)
E127°10′ (127.2°)
Direction and speed of movement NNE 20 km/h (10 kt)
Central pressure 1006 hPa
Maximum sustained wind speed near center 18 m/s (35 kt)
Maximum wind gust speed 25 m/s (50 kt)
Radius of probability circle 100 km (55 NM)
Forecast for 08/19 00 UTC
Grade TS
Intensity -
Center position of probability circle N25°50′ (25.8°)
E127°05′ (127.1°)
Direction and speed of movement N 15 km/h (9 kt)
Central pressure 1006 hPa
Maximum sustained wind speed near center 18 m/s (35 kt)
Maximum wind gust speed 25 m/s (50 kt)
Radius of probability circle 130 km (70 NM)
Forecast for 08/20 00 UTC
Grade TS
Intensity -
Center position of probability circle N29°00′ (29.0°)
E126°50′ (126.8°)
Direction and speed of movement N 15 km/h (8 kt)
Central pressure 1002 hPa
Maximum sustained wind speed near center 18 m/s (35 kt)
Maximum wind gust speed 25 m/s (50 kt)
Radius of probability circle 200 km (110 NM)
Forecast for 08/21 00 UTC
Grade TS
Intensity -
Center position of probability circle N30°55′ (30.9°)
E127°35′ (127.6°)
Direction and speed of movement NNE Slow
Central pressure 1002 hPa
Maximum sustained wind speed near center 18 m/s (35 kt)
Maximum wind gust speed 25 m/s (50 kt)
Radius of probability circle 260 km (140 NM)
Forecast for 08/22 00 UTC
Grade TS
Intensity -
Center position of probability circle N31°50′ (31.8°)
E128°00′ (128.0°)
Direction and speed of movement Almost stationary
Central pressure 1002 hPa
Maximum sustained wind speed near center 18 m/s (35 kt)
Maximum wind gust speed 25 m/s (50 kt)
Radius of probability circle 330 km (180 NM)
Forecast for 08/23 00 UTC
Grade TD
Intensity -
Center position of probability circle N32°40′ (32.7°)
E128°10′ (128.2°)
Direction and speed of movement Almost stationary
Central pressure 1006 hPa
Radius of probability circle 440 km (240 NM)

[ElectricStorm]

Looks like JMA has upgraded this to TS Lingling now. JTWC at 40kts

[cycloneye]

 https://x.com/WillWeatherRVA/status/1958341296096981375