Overall Green alert Tropical Cyclone for GRETEL-20
in Norfolk Island, New Caledonia, New Zealand
GDACS
Impact Single TC
Impact all weather systems in the area
.

Impact

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

Meteorological source GDACS (JTWC)
Exposed countries Norfolk Island, New Caledonia, New Zealand
Exposed population No people in Category 1 or higher
Maximum wind speed 102 km/h
Maximum storm surge 0.3 m (15 Mar 10:00 UTC)
Vulnerability Medium (New Caledonia)

GDACS Score

GDACS alert score for Tropical Cyclones is 0.5 (GREEN Alert), 1.5 (ORANGE Alert), 2.5 (RED Alert)
For more info on GDACS alert score click here.
  Wind Storm surge Rainfall GDACS score
GDACS Current 93 km/h 0.3 m n.a. 0.5
GDACS Overall 102 km/h 0.3 m n.a. 0.5

Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

Wind

93 km/h Current

Up to 270000 people in Tropical storm (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm
Population in
Cat. 1 or higher
Countries
Green 1 14 Mar 2020 18:00 111 280 thousand No people New Caledonia, Norfolk Island
Green 2 15 Mar 2020 00:00 102 280 thousand No people New Caledonia, Norfolk Island, New Zealand
Green 3 15 Mar 2020 06:00 111 280 thousand No people New Caledonia, Norfolk Island
Green 4 15 Mar 2020 12:00 102 280 thousand No people New Caledonia, Norfolk Island
Green 5 15 Mar 2020 18:00 93 280 thousand No people New Caledonia, Norfolk Island
Green 6 16 Mar 2020 00:00 93 280 thousand No people Norfolk Island, New Caledonia

Bulletin Timeline

Alert Date (UTC) Category Max winds
(km/h)
Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon) Countries
GREEN
1 14 Mar 2020 18:00 Tropical storm 74 270000 people no people -18.9, 160 New Caledonia
GREEN
2 15 Mar 2020 00:00 Tropical storm 93 270000 people no people -20.2, 161.7 New Caledonia
GREEN
3 15 Mar 2020 06:00 Tropical storm 102 270000 people no people -21.7, 163.3 New Caledonia
GREEN
4 15 Mar 2020 12:00 Tropical storm 102 270000 people no people -22.9, 165.7 New Caledonia
GREEN
5 15 Mar 2020 18:00 Tropical storm 93 190000 people no people -25.1, 168.3 New Caledonia
GREEN
6 16 Mar 2020 00:00 Tropical storm 93 2200 people no people -26.6, 169.7 Norfolk Island
GREEN
6 16 Mar 2020 12:00 Tropical storm 93 no people no people -29.3, 174
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.



Exposed population

Countries

Country
Norfolk I.
New Caledonia

Provinces

Region Province Country Population
Norfolk I. Norfolk Island -
New Caledonia New Caledonia 170000 people

Populated places

Name Region Province Country City class Population
Kingston Norfolk Island Capital <1000 people
Nouméa New Caledonia Capital 83000 people
Comm. du Mont-Dore New Caledonia City -

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft)
Norfolk Island International NLK 113 Civ. Paved Yes 6500
Ile Des Pins Moue ILP 96 Civ. Paved No 3600
Ile Ouen IOU unknown 0
Noumea / Magenta GEA 3 Civ. Paved Yes 4100
Mare la Roche MEE 43 Civ. Paved No 3200
La Tontouta NOU 16 Civ. Paved Yes 10600
Wanaham LIF 28 Civ. Paved No 3600
Houailou / Nesson HLU 3 Civ. Paved No 3200
Ouvea Ouloup UVE 7 Civ. Paved No 3600
Mueo PDC unknown 0
Touho TOU 3 Civ. Paved No 3600
Kone KNQ 7 Civ. Paved No 3200
Hienghene HNG unknown 0
Koumac KOC 13 Civ. Paved No 3600
Poum PUV unknown 0
Belep BMY unknown 0

Ports

Name LOCODE Country
Kingston Norfolk Island
Kuto New Caledonia
Matthew Island New Caledonia
Noumea NCNOU New Caledonia
Ducos NCDUS New Caledonia
Tadine New Caledonia
Thialis NCTHI New Caledonia
We New Caledonia
Kouaoua NCKOU New Caledonia
Baie de Poro NCPOR New Caledonia
Baie Ugue NCBUG New Caledonia
Nepoui NCNEP New Caledonia
Three Kings Island New Zealand
Babouillat New Caledonia
Chesterfield Iles Coral Sea Islands

Dams

No content available ..

Rainfall

Rainfall accumulation of the past 24h, as detected by the Global Precipitation Measurement mission of NASA. For more information, see https://www.nasa.gov/mission_pages/GPM/main/index.html.

...

StormSurge

0.3 m

The maximum Storm surge height is  0.3m in Kaala-Gomen, New Caledonia. This height is estimated for 15 Mar 2020 10:00 UTC .

The JRC has developed an experimental global storm surge model, which is run after each advisory issued by the regional tropical cyclone centres. The calculations are published about 20 minutes after a new advisory is detected by GDACS. The calculations identify the populated places affected by storm surge up to three days in advance, using the forecasted track. When forecasts change, the associated storm surge changes too and alert levels may go up or down. All links, data, statistics and maps refer to the latest available calculation. If the calculation for the last advisory is not completed, the latest available calculation is shown.

Locations affected by Storm surge (54 locations). Calculation based on advisory number 6 of 16 Mar 2020 00:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)
15 Mar 2020 10:00 Kaala-Gomen New Caledonia  0.3
14 Mar 2020 22:00 Arama New Caledonia  0.3
15 Mar 2020 09:00 Paagoumene New Caledonia  0.2
15 Mar 2020 16:00 Kuto New Caledonia  0.2
15 Mar 2020 16:00 Vao New Caledonia  0.2
14 Mar 2020 22:00 Pam New Caledonia  0.2
15 Mar 2020 10:00 Ouaco New Caledonia  0.2
15 Mar 2020 21:00 Gadji New Caledonia  0.2
15 Mar 2020 21:00 Wapan New Caledonia  0.2
15 Mar 2020 07:00 Poum-Plage New Caledonia  0.2
15 Mar 2020 07:00 Poum New Caledonia  0.2
15 Mar 2020 07:00 Tiabet New Caledonia  0.2
15 Mar 2020 15:00 Ouara New Caledonia  0.2
15 Mar 2020 14:00 Comm. du Mont-Dore New Caledonia  0.2
15 Mar 2020 14:00 Nouville New Caledonia  0.2
14 Mar 2020 22:00 Panane New Caledonia  0.1
14 Mar 2020 22:00 Mouane New Caledonia  0.1
14 Mar 2020 22:00 Ono New Caledonia  0.1
14 Mar 2020 22:00 Wala New Caledonia  0.1
15 Mar 2020 22:00 Bouloupari New Caledonia  0.1
15 Mar 2020 01:00 Port Alma Australia  0.1
14 Mar 2020 22:00 Houone New Caledonia  0.1
15 Mar 2020 21:00 Noumea New Caledonia  0.1
15 Mar 2020 21:00 Plum New Caledonia  0.1
15 Mar 2020 21:00 Prony New Caledonia  0.1
14 Mar 2020 21:00 Pairome New Caledonia  0.1
15 Mar 2020 00:00 Farnborough Australia  0.1
15 Mar 2020 00:00 Yeppoon Australia  0.1
15 Mar 2020 00:00 Emu Park Australia  0.1
15 Mar 2020 22:00 Tomo New Caledonia  0.1
15 Mar 2020 13:00 Paita New Caledonia  0.1
15 Mar 2020 13:00 Dumbea New Caledonia  0.1
15 Mar 2020 09:00 Oundjo New Caledonia  0.1
15 Mar 2020 01:00 Keppel Sands Australia  0.1
15 Mar 2020 12:00 Fayaoue New Caledonia  0.1
15 Mar 2020 19:00 Wadrilla New Caledonia  0.1
15 Mar 2020 12:00 Ognahu New Caledonia  0.1
14 Mar 2020 22:00 Bweo New Caledonia  0.1
15 Mar 2020 13:00 Goro New Caledonia  0.1
15 Mar 2020 13:00 Nde New Caledonia  0.1
15 Mar 2020 12:00 Lekia New Caledonia  0.1
15 Mar 2020 21:00 Saint-Louis New Caledonia  0.1
15 Mar 2020 03:00 Mowhanau New Zealand  0.1
15 Mar 2020 03:00 Kai Iwi Beach New Zealand  0.1
15 Mar 2020 03:00 Rapanui New Zealand  0.1
15 Mar 2020 03:00 Castlecliff New Zealand  0.1
15 Mar 2020 03:00 Wanganui New Zealand  0.1
15 Mar 2020 03:00 Tangimoana New Zealand  0.1
15 Mar 2020 10:00 Gouaro New Caledonia  0.1
16 Mar 2020 07:00 Kingston Norfolk Island  0.1
14 Mar 2020 21:00 Ometteux New Caledonia  0.1
14 Mar 2020 21:00 Ponerihouen New Caledonia  0.1
14 Mar 2020 21:00 Bayes New Caledonia  0.1
15 Mar 2020 09:00 Touho New Caledonia  0.1