Overall Green alert Tropical Cyclone for TWENTYEIGH-21
in New Caledonia
Impact Single TC
HWRF
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 HWRF
Exposed countries
Exposed population No people in Category 1 or higher
Maximum wind speed 61 km/h
Maximum storm surge 0.2 m (11 Apr 12:30 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
HWRF Current 61 km/h 0.2 m 75 mm 0.5
HWRF Overall 79 km/h 0.3 m 198 mm 0.5

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

Wind

79 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 18:00 79 - - - - - - -
GREEN 2 11 Apr 2021 00:00 68 - - - - - - -
GREEN 3 11 Apr 2021 06:00 72 - - - - - - -
GREEN 4 11 Apr 2021 12:00 61 - - - - - - -




Impact estimation for the next 72h
Download:





Rain exposed population - AoIs

No exposed population (greater than 50mm) based on the bulletin of 11 Apr 2021 12:00 UTC

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 18:00 195 - - - - - - -
Blue 2 11 Apr 2021 00:00 154 - - - - - - -
Blue 3 11 Apr 2021 06:00 87 - - - - - - -
Blue 4 11 Apr 2021 12:00 80 - - - - - - -




Impact estimation for the next 72h

StormSurge

0.2 m

The maximum Storm surge height is  0.2m in Benowa, Australia. This height is estimated for 11 Apr 2021 12:30 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)
11 Apr 2021 12:30 Benowa Australia  0.2
11 Apr 2021 12:30 Gold Coast Australia  0.2
11 Apr 2021 12:30 Moondarewa Australia  0.2
11 Apr 2021 12:30 Southport Australia  0.2
11 Apr 2021 12:30 Surfers Paradise Australia  0.2
11 Apr 2021 12:30 Broadbeach Australia  0.2
11 Apr 2021 12:30 West Burleigh Australia  0.2
11 Apr 2021 12:30 Burleigh Heads Australia  0.2
11 Apr 2021 12:30 Piggabeen Australia  0.2
11 Apr 2021 12:30 Bilambil Australia  0.2
11 Apr 2021 12:30 Palm Beach Australia  0.2
11 Apr 2021 12:30 Currumbin Australia  0.2
11 Apr 2021 12:30 Tugun Australia  0.2
11 Apr 2021 12:30 Bilinga Australia  0.2
11 Apr 2021 12:30 Tweed Heads Australia  0.2
11 Apr 2021 12:30 Coolangatta Australia  0.2
11 Apr 2021 12:30 Kingscliff-Fingal Australia  0.2
11 Apr 2021 16:30 Ho New Caledonia  0.2
11 Apr 2021 16:30 Meomo New Caledonia  0.2
11 Apr 2021 16:30 Houailou New Caledonia  0.2
11 Apr 2021 16:30 Ouakaya New Caledonia  0.2
11 Apr 2021 16:30 Poro New Caledonia  0.2
11 Apr 2021 16:30 Kouaoua New Caledonia  0.2
11 Apr 2021 14:45 Ouasse New Caledonia  0.2
11 Apr 2021 23:30 Tumbulgum Australia  0.2
11 Apr 2021 23:30 North Tumbulgum Australia  0.2
11 Apr 2021 23:30 Terranora Australia  0.2
11 Apr 2021 23:30 Stotts Creek Australia  0.2
11 Apr 2021 23:30 Cudgen Australia  0.2
11 Apr 2021 23:30 Chinderah Australia  0.2
11 Apr 2021 23:30 Kingscliff Australia  0.2
12 Apr 2021 11:30 Kuine New Caledonia  0.2
12 Apr 2021 11:30 Nakety New Caledonia  0.2
12 Apr 2021 11:30 Thio New Caledonia  0.2
12 Apr 2021 03:45 Ouanache New Caledonia  0.2
12 Apr 2021 03:45 Paola New Caledonia  0.2
12 Apr 2021 03:45 Vieux Tuho New Caledonia  0.2
12 Apr 2021 03:45 Touho New Caledonia  0.2
12 Apr 2021 03:45 Kokengone New Caledonia  0.2
11 Apr 2021 18:30 Nailanga Fiji  0.2
11 Apr 2021 18:30 Sorokoba Fiji  0.2
11 Apr 2021 18:30 Ba Fiji  0.2
11 Apr 2021 18:30 Natunuka Fiji  0.2
11 Apr 2021 12:30 Upper Corindi Australia  0.2
11 Apr 2021 12:30 Woogoolga Australia  0.2
11 Apr 2021 12:30 Corindi Australia  0.2
11 Apr 2021 12:30 Red Rock Australia  0.2
11 Apr 2021 12:30 Wooli Australia  0.2
12 Apr 2021 20:00 Canala New Caledonia  0.1
12 Apr 2021 03:45 Lautoka Fiji  0.1
12 Apr 2021 09:00 Avondale Australia  0.1
12 Apr 2021 09:00 Moore Park Australia  0.1
11 Apr 2021 21:00 Panane New Caledonia  0.1
11 Apr 2021 21:00 Mouane New Caledonia  0.1
11 Apr 2021 21:00 Ono New Caledonia  0.1
11 Apr 2021 21:00 Wala New Caledonia  0.1
11 Apr 2021 21:00 Bweo New Caledonia  0.1
12 Apr 2021 09:15 Fairymead Australia  0.1
12 Apr 2021 09:15 Port Bundaberg Australia  0.1
12 Apr 2021 09:15 The Grange Australia  0.1
12 Apr 2021 09:15 Burnett Heads Australia  0.1
12 Apr 2021 11:45 Mamie New Caledonia  0.1
12 Apr 2021 11:45 Yate-Village New Caledonia  0.1
11 Apr 2021 13:45 Ouara New Caledonia  0.1
11 Apr 2021 18:30 Tavua Fiji  0.1
11 Apr 2021 18:30 Rabulu Fiji  0.1
12 Apr 2021 02:45 Saint-Denis New Caledonia  0.1
12 Apr 2021 02:45 Poindimie New Caledonia  0.1
12 Apr 2021 02:45 Bayes New Caledonia  0.1
12 Apr 2021 02:30 Tipindje New Caledonia  0.1
12 Apr 2021 02:30 Pindache New Caledonia  0.1
11 Apr 2021 14:45 Saint Roch New Caledonia  0.1
11 Apr 2021 14:45 Ngoye New Caledonia  0.1
11 Apr 2021 14:45 Petit-Borindi New Caledonia  0.1
11 Apr 2021 23:45 Saint-Gabriel New Caledonia  0.1
12 Apr 2021 07:30 Coomera Australia  0.1
12 Apr 2021 07:30 Norwell Australia  0.1
11 Apr 2021 16:00 Kuto New Caledonia  0.1
11 Apr 2021 16:00 Wapan New Caledonia  0.1
11 Apr 2021 16:00 Vao New Caledonia  0.1
12 Apr 2021 06:15 Gadji New Caledonia  0.1
14 Apr 2021 12:00 Dundowran Australia  0.1
14 Apr 2021 12:00 Urraween Australia  0.1
14 Apr 2021 12:00 Point Vernon Australia  0.1
14 Apr 2021 12:00 Kawungan Australia  0.1
14 Apr 2021 12:00 Pialba Australia  0.1
14 Apr 2021 12:00 Scarness Australia  0.1
14 Apr 2021 12:00 Torquay Australia  0.1
14 Apr 2021 12:00 Urangan Australia  0.1
14 Apr 2021 12:00 Bingham Australia  0.1
12 Apr 2021 09:45 Bargara Australia  0.1
12 Apr 2021 06:00 Tiabet New Caledonia  0.1
12 Apr 2021 06:00 Poum New Caledonia  0.1
12 Apr 2021 06:00 Poum-Plage New Caledonia  0.1
12 Apr 2021 20:00 Waho New Caledonia  0.1
12 Apr 2021 20:00 Goro New Caledonia  0.1
12 Apr 2021 01:30 Nouville New Caledonia  0.1
12 Apr 2021 01:30 Noumea New Caledonia  0.1
12 Apr 2021 01:30 Dumbea New Caledonia  0.1
12 Apr 2021 01:30 Comm. du Mont-Dore New Caledonia  0.1
12 Apr 2021 01:30 Saint-Louis New Caledonia  0.1
12 Apr 2021 01:30 Plum New Caledonia  0.1
11 Apr 2021 12:00 Pemberton Australia  0.1
11 Apr 2021 12:00 Elliott Heads Australia  0.1
11 Apr 2021 12:00 Woodgate Australia  0.1
11 Apr 2021 14:15 Prony New Caledonia  0.1
11 Apr 2021 15:15 Balaide New Caledonia  0.1
11 Apr 2021 15:15 Saint-Paul New Caledonia  0.1
11 Apr 2021 15:15 Pouebo New Caledonia  0.1
11 Apr 2021 21:00 Nde New Caledonia  0.1
11 Apr 2021 21:00 Paita New Caledonia  0.1
11 Apr 2021 16:00 Ometteux New Caledonia  0.1
11 Apr 2021 16:00 Ponerihouen New Caledonia  0.1
11 Apr 2021 16:00 Mou New Caledonia  0.1
11 Apr 2021 16:00 Moneo New Caledonia  0.1
12 Apr 2021 03:15 Pairome New Caledonia  0.1
11 Apr 2021 21:45 Redland Bay Australia  0.1
11 Apr 2021 21:45 Victoria Point Australia  0.1
11 Apr 2021 21:45 Woongoolba Australia  0.1
11 Apr 2021 21:45 Steiglitz Australia  0.1
11 Apr 2021 21:45 Dunwich Australia  0.1
11 Apr 2021 21:45 Wallen Wallen Australia  0.1
11 Apr 2021 21:45 Canalpin Australia  0.1
13 Apr 2021 00:30 Namaka Fiji  0.1
11 Apr 2021 20:45 Tewantin Australia  0.1
11 Apr 2021 20:45 Noosaville Australia  0.1
11 Apr 2021 20:45 Coolum Australia  0.1
11 Apr 2021 20:45 Coolum Beach Australia  0.1
11 Apr 2021 20:45 Noosa Heads Australia  0.1
11 Apr 2021 21:15 Tin Can Bay Australia  0.1