Overall Green alert Tropical Cyclone for TAM-25
in Vanuatu, New Caledonia, Norfolk Island

Event summary

Tropical Cyclone TAM-25 can have a low humanitarian impact based on the maximum sustained wind speed, exposed population and vulnerability.

GDACS ID TC 1001159
Name TAM-25
From - To 14 Apr - 15 Apr
Exposed countries Vanuatu, New Caledonia, Norfolk Island
Exposed population No people in Category 1 or higher
Maximum wind speed 102 km/h Tropical storm
Maximum storm surge 0.4 m (14 Apr 14:00 UTC)
Vulnerability Medium (New Caledonia)

GDACS Score

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Wind Storm surge Rainfall GDACS score
GDACS JTWC 102 km/h 0.4 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 144 km/h 0.6 m 564 mm 0.5
GFS 130 km/h 0.6 m 520 mm 0.5
ECMWF 122 km/h n.a. 628 mm 0.5
Maximum expected impact (wind, storm surge and rainfall) using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Vanuatu, New Caledonia (France) - Tropical storm THIRTY (ECHO 15 Apr 2025)Tue, 15 Apr 2025 11:06

  • A new tropical storm named THIRTY formed over the eastern Coral Sea on 14 April in the morning (UTC) and started moving southeast toward southern Vanuatu and eastern New Caledonia (France). On 15 April at 0.00 UTC, its centre was located offshore approximately 30 km southeast of Erromango island, with maximum sustained winds of 83 km/h (tropical storm).
  • THIRTY is forecast to pass the eastern of Loanengo island, New Caledonia, in the morning (UTC) of 15 April, with maximum sustained winds up to 93 km/h, and it is expected to continue southward over the South West Pacific Ocean, close to the Norfolk Islands.
  • Over the next 24 hours, heavy rainfall, thunderstorms and strong winds are forecast over southern Vanuatu and eastern New Caledonia.
  • OpenStreetMap
    The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.
2000 km
Detailed event map. European Union, 2025. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

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For this events, GDACS has links to information from the following sources: EC-JRC (40), (2), WMO (1), INFORM (2),