Overall Green alert Tropical Cyclone for GRETEL-20
in Norfolk Island, New Caledonia, New Zealand

Event summary

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

GDACS ID TC 1000661
Name GRETEL-20
From - To 14 Mar - 16 Mar
Exposed countries Norfolk Island, New Caledonia, New Zealand
Exposed population No people in Category 1 or higher
Maximum wind speed 102 km/h, Tropical storm
Maximum storm surge 0.3 m (15 Mar 10:00 UTC)
Vulnerability Medium (New Caledonia)


For more info on GDACS alert score click here.
+ Wind Storm surge Rainfall GDACS score
GDACS 102 km/h 0.3 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 119 km/h 0.8 m 307 mm 0.5
GFS 137 km/h 0.5 m 333 mm 0.5
ECMWF 115 km/h 0.4 m 413 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
New Caledonia - Tropical Cyclone GRETEL (ECHO 16 Mar 2020)Mon, 16 Mar 2020 10:59

  • After the passage of Tropical Cyclone GRETEL off the Caledonian coast on 15-16 March, significant damage has been reported across New Caledonia.
  • National authorities report one injury in Grande Terre, and main roads and infrastructure damaged across the islands. Schools will remain closed on 16 March and flights cancelled or delayed.
  • GRETEL is forecast to continue south-east before dissipating on 16 March. Heavy rain will affect most of Grande Terre, Mare and Ouvea islands over the next 24 hours.
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.

Updates on volcanic activity (Smithsonian)

Latest media headlines

Articles: 4 | About casualties: 0 | Last hour: 0

NASA finds Gretel becoming extra-tropicalMon, 16 Mar 2020 17:24:00 +0100.

IMAGE: On March 16, the MODIS instrument that flies aboard NASA's Terra satellite took this image of Tropical Cyclone Gretel and showed a transitioning storm northwest of New Zealand. Credit: Credit: NASA Worldview. NASA's Terra satellite
Gretel - Southern Pacific OceanMon, 16 Mar 2020 16:48:00 +0100.

Mar. 16, 2020 – NASA Finds Gretel Becoming Extra-Tropical. NASA’s Terra satellite passed over the Southern Pacific Ocean and captured an image of Tropical Storm Gretel as it was transitioning into an extra-tropical cyclone, northwest of New
Les réseaux éléctriques en cours de diagnostic par EEC après le passag ... Mon, 16 Mar 2020 02:01:00 +0100.

Le distributeur d'électricité EEC informe, à 11 heures ce lundi 16 mars, du point de situation sur les concessions confiées à sa gestion. Actuellement, les équipes de EEC procèdent à des visites de lignes avant de pouvoir effectuer la remis
Gretel : EEC déclenche son plan cycloneSun, 15 Mar 2020 03:36:00 +0100.

En raison de l'arrivée de la dépression Gretel, EEC a décidé d'activer son plan cyclone. Ainsi, la cellule cyclone d’EEC a été mise en place et assure une permanence au 05.36.36 (Numéro vert) pour recueillir toute information. Pour rappel,

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 (35), (1), WMO (1), INFORM (2),