Natural Catastrophe·Monitoring
Indonesia Issues Tsunami Warning for Northeast Coastal Areas
🇮🇩 Northeast coastal areas of Indonesia· Country8 Jun
7 reportsPROPMHMC+2
LowAI Refreshed
ClosedLow impactAI Generated
Tropical Cyclone JANGMI-26 Active in NW Pacific Near Japan
Occurred 27 May 2026·Detected 27 May 2026·
🇯🇵 Northwest Pacific Ocean, affecting Japan region4 reportsEnded 2 Jun 2026
Natural CatastropheEnergy & InfrastructurePropertyMarine CargoEnergyReinsurance
Tropical Cyclone JANGMI-26 is active in the Northwest Pacific with maximum wind speeds of 167 km/h, though GDACS has issued only a Green alert. Estimated population affected by Category 1 or higher winds is zero, indicating the storm is not currently threatening populated areas. No insured loss pathway is evident at this stage.
AI-generated from linked source reports. See our correction policy.
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Impact verdict
Low impact. GDACS Green alert with zero population affected by Category 1+ winds. No named commercial assets, ports, infrastructure, or insured properties are reported as threatened. No loss pathway exists at this stage; storm warrants monitoring only if track shifts toward populated coastal Japan.
View assessment methodologyHow we grade what we know -- Known · Reported · Uncertain. Methodology →
Intelligence ledger
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Known5 lines
GDACS Green alert issued for Tropical Cyclone JANGMI-26▾
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Maximum wind speed recorded at 167 km/h (Tropical Depression classification per GDACS alert level)▾
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Storm active in Northwest Pacific from 27 May 2026▾
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Japan listed as affected country with Low vulnerability rating▾
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Estimated population affected by Category 1+ winds: zero▾
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Reported1 line
Storm classified as Tropical Depression by GDACS despite 167 km/h wind speed notation▾
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Uncertain3 lines
Forecast track and whether storm will intensify or make landfall▾
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Whether storm path will shift toward populated or insured coastal areas▾
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Discrepancy between wind speed (167 km/h, typhoon strength) and Green alert/Tropical Depression classification▾
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Geographic Zone Matches
1 active match
- Pacific Ring of FireRule-basedConfidence 100%
Geographic zone matches are RiskEvents spatial/analytical indicators, not coverage determinations or Lloyd's official classifications.
Affected countries
🇦🇺 Australia🇪🇸 Spain🇯🇵 Japan
Timeline
Corroboration9 Jun 2026, 05:09
Typhoon Jangmi made landfall in Chiba Prefecture, Japan, triggering widespread TEPCO power outages across multiple cities and towns, evacuation orders, and suspension of Japan Post counter services. The storm is a developing natural catastrophe event in a densely populated and insured region of Japan, with potential property, energy, and marine cargo exposure for London market underwriters.
Source: r/chiba (Social / Community) · View source
Status Change4 Jun 2026, 08:30
Lifecycle changed
monitoring → closed
Closure4 Jun 2026, 08:30
Event Closed
auto_closed_monitoring_timeout
Corroboration2 Jun 2026, 08:28
Typhoon Jangmi has struck Japan's southern Okinawa prefecture, injuring more than 10 people and causing power outages affecting over 47,000 homes across Okinawa and Kagoshima prefectures. The storm has cancelled more than 300 flights and is expected to cause strong winds, heavy rain, landslides, and high waves. No credible insured loss estimates or named commercial/industrial asset damage are provided in the source.
Source: Anadolu Agency (Turkish) (Wire Service) · View source
Corroboration1 Jun 2026, 07:54
Typhoon Jangmi, forming within a monsoonal gyre over the Philippine Sea, is forecast to track near Okinawa before moving toward southeastern Japan. The storm is characterised by broad low pressure and extensive wind fields without a distinct eye. No insured loss estimates, named facility damage, or port/infrastructure disruptions are reported at this stage.
Source: The Guardian World (Mainstream Media) · View source
Status Change29 May 2026, 05:30
Status changed to monitoring
Auto-transitioned: no updates for 6 hours
active → monitoring
Status Change28 May 2026, 22:36
Status changed to active
remediation: existing authoritative signal
signal → active
Initial Detection27 May 2026, 08:34
Initial Detection
Tropical Cyclone JANGMI-26 is active in the Northwest Pacific with maximum wind speeds of 167 km/h, though GDACS has issued only a Green alert. Estimated population affected by Category 1 or higher winds is zero, indicating the storm is not currently threatening populated areas. No insured loss pathway is evident at this stage.
Estimated population affected by category 1 (120 km/h) wind speeds or higher is 0 (0 in tropical storm). Alert level: Green. Severity: Tropical Depression (maximum wind speed of 167 km/h). Country: Japan
Source: GDACS Alerts (Official Advisory) · View source
Lloyd's classifications
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