Overall Green Tropical Cyclone for FOUR-20
in , Fiji, Vanuatu

Event summary

Tropical Cyclone FOUR-20 can have a low humanitarian impact based on the maximum sustained wind speed, exposed population and vulnerability.

GDACS ID TC 1000751
Name FOUR-20
From - To 11 Dec - 12 Dec
Exposed countries , Fiji, Vanuatu
Exposed population No people in Category 1 or higher
Maximum wind speed 74 km/h Tropical storm
Maximum storm surge 0.2 m (12 Dec 16:00 UTC)
Vulnerability --

GDACS Score

For more info on GDACS alert score click here.
Wind Storm surge Rainfall GDACS score
GDACS JTWC n.a 0.2 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 162 km/h 0.5 m 1023 mm 0.5
GFS 166 km/h 0.5 m 976 mm 0.5
ECMWF 112 km/h 0.4 m 735 mm 0.5
Maximum expected impact (wind, storm surge and rainfall) using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Fiji - Tropical cyclone FOUR-20 (ECHO 11 Dec 2020)Fri, 11 Dec 2020 02:00

  • A new tropical cyclone named FOUR formed in the South Pacific Ocean, and it is moving west towards Rotuma Island (Fiji). On 11 December its center was located approximately 300 km south-east of Rotuma, with maximum sustained wind of 65 km/h.
  • Tropical cyclone FOUR-20 is expected to strengthen, while moving west over the South Pacific Ocean, passing south of Rotuma in the afternoon (UTC) of 11 December.
  • Heavy rainfall warnings remain in force for Rotuma and heavy rainfall, strong wind and high waves are expected over Rotuma on 11-12 December.
Detailed event map. European Union, 2026. 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.

Updates on volcanic activity (Smithsonian)

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Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: UNOSAT (1), EC-JRC (38), INFORM (1), (1),