Overall Green alert Tropical Cyclone for TWENTYONE-20
in Australia

Event summary

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

GDACS ID TC 1000659
Name TWENTYONE-20
From - To 11 Mar - 11 Mar
Exposed countries Australia
Exposed population No people in Category 1 or higher
Maximum wind speed 65 km/h, Tropical storm
Maximum storm surge 0.6 m (11 Mar 17:00 UTC)
Vulnerability Low (Australia)

GDACS Score

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+ Wind Storm surge Rainfall GDACS score
GDACS 65 km/h 0.6 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 83 km/h 0.4 m 430 mm 0.5
GFS 65 km/h 0.4 m 154 mm 0.5
ECMWF 101 km/h 0.4 m 211 mm 0.5
Beta Version - All weather systems in the area: maximum expected impact (wind, storm surge, rainfall)
Maximum expected impact (wind, storm surge and rainfall) using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Australia - Tropical Cyclone TWENTYONE (ECHO 12 Mar 2020)Thu, 12 Mar 2020 11:06

  • Tropical Cyclone TWENTYONE formed over eastern Indian Ocean on 11 March and started moving towards north-west Western Australia. On 11 March at 18.00 UTC, its centre was located approximately 260 km north of Barrow Island, with maximum sustained winds of 65 km/h (tropical storm).
  • TWENTYONE is expected to make landfall over Shire of Exmouth on the evening of 12 March as a tropical depression.
  • Over the next 24 hours, heavy rain, strong winds and storm surge are forecast over north-west Gascoyne Region.
  • The Bureau of Meteorology (BOM) has issued a warning zone for severe weather over the area.
Detailed event map. European Union, 2015. 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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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: JRC (59), (2), BOM (1), JTWC (1), NASA (1), NOAA (1), OCHA (1), TRMM (1), WMO (1), INFORM (2),