Overall Green alert Tropical Cyclone for TWENTYEIGH-21
in New Caledonia
click on to select bulletin time
GDACS
Impact Single TC
Impact all weather systems in the area

Impact

Tropical Cyclone TWENTYEIGH-21 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source GDACS
Exposed countries New Caledonia
Exposed population No people in Category 1 or higher
Maximum wind speed 74 km/h
Maximum storm surge 0.2 m (10 Apr 20:00 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 65 km/h 0.2 m n.a. 0.5
GDACS Overall 74 km/h 0.2 m n.a. 0.5

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

Wind

65 km/h Current Max.

Up to 10000 people in Tropical Storm strength or higher (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm or higher
Population in
Cat 1. or higher
Countries
Green 1 10 Apr 2021 18:00 65 10 thousand No people New Caledonia
Green 2 11 Apr 2021 00:00 74 10 thousand No people New Caledonia
Green 3 11 Apr 2021 06:00 74 10 thousand No people New Caledonia
Green 4 11 Apr 2021 12:00 65 10 thousand No people 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 10 Apr 2021 18:00 Tropical storm 65 no people no people -23.4, 167.2
GREEN
2 11 Apr 2021 00:00 Tropical storm 74 no people no people -24.6, 167.9
GREEN
3 11 Apr 2021 06:00 Tropical storm 74 no people no people -26.1, 169.2
GREEN
4 11 Apr 2021 12:00 Tropical storm 65 no people no people -27.5, 170.7
GREEN
4 12 Apr 2021 00:00 Tropical depression 56 no people no people -29.9, 172.9
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.
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Exposed population - AoIs

Exposed population in the potential affected countries, provinces and populated places

Countries

Country
New Caledonia

Provinces

Region Province Country Population
New Caledonia New Caledonia 170000 people

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)
Ile Des Pins Moue ILP 96 Civ. Paved No 3600
Ile Ouen IOU unknown 0

Ports

Name LOCODE Country
Kuto New Caledonia

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

0.2 m

The maximum Storm surge height is  0.2m in Gadji, New Caledonia. This height is estimated for 10 Apr 2021 20:00 UTC .

The JRC has developed an experimental global storm surge model. 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 (15 locations). Calculation based on advisory number 4 of 11 Apr 2021 12:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)
10 Apr 2021 20:00 Gadji New Caledonia  0.2
10 Apr 2021 20:00 Kuto New Caledonia  0.2
10 Apr 2021 20:00 Vao New Caledonia  0.2
10 Apr 2021 20:00 Ouara New Caledonia  0.1
10 Apr 2021 19:00 Poum New Caledonia  0.1
10 Apr 2021 19:00 Poum-Plage New Caledonia  0.1
10 Apr 2021 21:00 Plum New Caledonia  0.1
10 Apr 2021 20:00 Prony New Caledonia  0.1
10 Apr 2021 19:00 Tiabet New Caledonia  0.1
10 Apr 2021 19:00 Goro New Caledonia  0.1
10 Apr 2021 19:00 Wapan New Caledonia  0.1
10 Apr 2021 19:00 Arama New Caledonia  0.1
10 Apr 2021 22:00 Tomo New Caledonia  0.1
10 Apr 2021 20:00 Nouville New Caledonia  0.1
10 Apr 2021 20:00 Comm. du Mont-Dore New Caledonia  0.1