Overall Green alert Tropical Cyclone for TWENTYEIGH-21
in New Caledonia
Impact Single TC
ECMWF
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 ECMWF
Exposed countries
Exposed population No people in Category 1 or higher
Maximum wind speed 83 km/h
Maximum storm surge 0.3 m (12 Apr 00:30 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
ECMWF Current 83 km/h 0.3 m 148 mm 0.5
ECMWF Overall 83 km/h 0.3 m 507 mm 0.5

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

Wind

83 km/h

No people by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

No exposed population (in Tropical Storm or higher) based on the bulletin of 11 Apr 2021 12:00 UTC

See TC classification SSHS


Wind Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert Date (UTC) Max Winds (km/h) Pop in Cat. 1 or higher TS Cat. 1 Cat. 2 Cat. 3 Cat. 4 Cat. 5 Countries
GREEN 1 10 Apr 2021 00:00 72 -
- - - - - New Caledonia
GREEN 2 10 Apr 2021 12:00 79 -
- - - - - New Caledonia
GREEN 3 11 Apr 2021 00:00 83 - - - - - - -
GREEN 4 11 Apr 2021 12:00 83 - - - - - - -




Impact estimation for the next 72h
Download:





Rain exposed population - AoIs

Estimations based on the bulletin of 11 Apr 2021 12:00 UTC
LevelCountryPopulation 
100-250 mmNew Caledonia5557 
50-100 mmNew Caledonia188977 

Rain Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert Date (UTC) Max Rainfall (mm) Pop >100mm or higher 50-100 100-250 250-500 500-750 750-1000 >1000 Countries
Blue 1 10 Apr 2021 00:00 204 7 thousand
- - - - New Caledonia
Blue 2 10 Apr 2021 12:00 175 - - - - - - -
Blue 3 11 Apr 2021 00:00 223 - - - - - - -
Blue 4 11 Apr 2021 12:00 461 6 thousand
- - - - New Caledonia




Impact estimation for the next 72h

StormSurge

0.3 m

The maximum Storm surge height is  0.3m in Avondale, Australia. This height is estimated for 12 Apr 2021 00:30 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.

Calculation based on the bulletin of 11 Apr 2021 12:00 UTC
Alert Date (UTC) Name Country Storm surge height (m)
12 Apr 2021 00:30 Avondale Australia  0.3
12 Apr 2021 00:30 Moore Park Australia  0.3
12 Apr 2021 00:30 Fairymead Australia  0.3
12 Apr 2021 00:30 Port Bundaberg Australia  0.3
12 Apr 2021 00:30 The Grange Australia  0.3
12 Apr 2021 00:30 Burnett Heads Australia  0.3
12 Apr 2021 23:30 Lautoka Fiji  0.2
12 Apr 2021 23:30 Nailanga Fiji  0.2
12 Apr 2021 23:30 Sorokoba Fiji  0.2
12 Apr 2021 23:30 Ba Fiji  0.2
12 Apr 2021 23:30 Natunuka Fiji  0.2
12 Apr 2021 00:15 Bargara Australia  0.2
11 Apr 2021 23:45 Tavua Fiji  0.2
11 Apr 2021 23:45 Rabulu Fiji  0.2
12 Apr 2021 02:30 Ho New Caledonia  0.2
12 Apr 2021 02:30 Meomo New Caledonia  0.2
12 Apr 2021 02:30 Houailou New Caledonia  0.2
12 Apr 2021 02:30 Ouakaya New Caledonia  0.2
12 Apr 2021 02:30 Poro New Caledonia  0.2
12 Apr 2021 02:30 Kouaoua New Caledonia  0.2
11 Apr 2021 20:45 Tiabet New Caledonia  0.1
11 Apr 2021 20:45 Poum-Plage New Caledonia  0.1
12 Apr 2021 07:45 Pemberton Australia  0.1
12 Apr 2021 07:45 Elliott Heads Australia  0.1
12 Apr 2021 07:45 Woodgate Australia  0.1
13 Apr 2021 22:30 Solevu Fiji  0.1
13 Apr 2021 22:30 Momi Fiji  0.1
13 Apr 2021 22:30 Lomawal Fiji  0.1
13 Apr 2021 22:30 Nadi Fiji  0.1
12 Apr 2021 02:30 Paola New Caledonia  0.1
12 Apr 2021 02:30 Vieux Tuho New Caledonia  0.1
12 Apr 2021 02:30 Touho New Caledonia  0.1
12 Apr 2021 02:30 Kokengone New Caledonia  0.1
11 Apr 2021 17:15 Ouanache New Caledonia  0.1
11 Apr 2021 21:00 Poindimie New Caledonia  0.1
11 Apr 2021 21:00 Ometteux New Caledonia  0.1
11 Apr 2021 21:00 Ponerihouen New Caledonia  0.1
11 Apr 2021 21:00 Bayes New Caledonia  0.1
11 Apr 2021 21:00 Mou New Caledonia  0.1
11 Apr 2021 21:00 Moneo New Caledonia  0.1
11 Apr 2021 16:45 Goro New Caledonia  0.1
13 Apr 2021 02:00 Namaka Fiji  0.1
12 Apr 2021 06:45 Buxton Australia  0.1
12 Apr 2021 06:45 Burrum Australia  0.1
12 Apr 2021 06:45 Traviston Australia  0.1
12 Apr 2021 09:30 Dundowran Australia  0.1
12 Apr 2021 09:30 Urraween Australia  0.1
12 Apr 2021 09:30 Point Vernon Australia  0.1
12 Apr 2021 09:30 Kawungan Australia  0.1
12 Apr 2021 09:30 Pialba Australia  0.1
12 Apr 2021 09:30 Scarness Australia  0.1
12 Apr 2021 09:30 Torquay Australia  0.1
12 Apr 2021 09:30 Urangan Australia  0.1
12 Apr 2021 09:30 Bingham Australia  0.1
11 Apr 2021 12:00 Prony New Caledonia  0.1
11 Apr 2021 12:00 Ouara New Caledonia  0.1
11 Apr 2021 12:00 Waho New Caledonia  0.1
12 Apr 2021 10:00 Tin Can Bay Australia  0.1
11 Apr 2021 13:00 Nouville New Caledonia  0.1
11 Apr 2021 13:00 Noumea New Caledonia  0.1
11 Apr 2021 13:00 Dumbea New Caledonia  0.1
11 Apr 2021 13:00 Comm. du Mont-Dore New Caledonia  0.1
11 Apr 2021 13:00 Saint-Louis New Caledonia  0.1
11 Apr 2021 13:00 Plum New Caledonia  0.1
13 Apr 2021 02:30 Tavua Fiji  0.1
12 Apr 2021 08:15 Nde New Caledonia  0.1
12 Apr 2021 08:15 Paita New Caledonia  0.1
12 Apr 2021 07:15 Toogoom Australia  0.1
13 Apr 2021 02:15 Thio New Caledonia  0.1
13 Apr 2021 02:15 Saint-Gabriel New Caledonia  0.1
13 Apr 2021 02:15 Saint Roch New Caledonia  0.1
13 Apr 2021 04:15 Kuine New Caledonia  0.1
13 Apr 2021 04:15 Ouasse New Caledonia  0.1
13 Apr 2021 04:15 Nakety New Caledonia  0.1
13 Apr 2021 12:15 Panane New Caledonia  0.1
13 Apr 2021 12:15 Mouane New Caledonia  0.1
13 Apr 2021 12:15 Ono New Caledonia  0.1
11 Apr 2021 15:30 Wala New Caledonia  0.1
11 Apr 2021 15:30 Bweo New Caledonia  0.1
11 Apr 2021 15:30 Pairome New Caledonia  0.1
12 Apr 2021 13:00 Potnarvin Vanuatu  0.1
12 Apr 2021 13:00 Ipota Vanuatu  0.1
11 Apr 2021 23:30 Gadji New Caledonia  0.1
11 Apr 2021 23:30 Kuto New Caledonia  0.1
11 Apr 2021 23:30 Wapan New Caledonia  0.1
11 Apr 2021 23:30 Vao New Caledonia  0.1
13 Apr 2021 02:15 Canala New Caledonia  0.1
12 Apr 2021 11:45 Mamie New Caledonia  0.1
12 Apr 2021 11:45 Yate-Village New Caledonia  0.1
12 Apr 2021 11:00 Ngoye New Caledonia  0.1
12 Apr 2021 11:00 Petit-Borindi New Caledonia  0.1