Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga
13 Dec 2020 00 UTC
click on to select bulletin time
Impact Single TC
Impact based on all weather systems in the area

Impact

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

Meteorological source ECMWF
Exposed countries Tonga
Exposed population No people in Category 1 or higher
Maximum wind speed 65 km/h
Maximum storm surge 0.3 m (13 Dec 09:45 UTC)
Vulnerability High (Niue)

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 65 km/h 0.3 m 18 mm 0.5
ECMWF Overall 198 km/h 1.6 m 673 mm 1.5

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

TOP

Wind

198 km/h

Up to 20 thousand can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 13 Dec 2020 00:00 UTC
CategoryCountryPopulation 
Tropical StormTonga15,200 

See TC classification SSHS


Wind Impact Timeline

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


Alert N° 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 13 Dec 2020 00:00 79 -
- - - - - Tonga
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 13 Dec 2020 00:00 UTC
LevelCountryPopulation 
250-500 mmTonga01 
100-250 mmWallis and Futuna, Samoa, Tonga, Fiji43,105
+
Fiji1,265 
Wallis and Futuna8,931 
Samoa16,563 
Tonga16,346 
50-100 mmTuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga, Niue286,604
+
Tuvalu481 
Fiji94,731 
Wallis and Futuna6,383 
Samoa129,998 
American Samoa53,380 
Tonga441 
Niue1,190 

Rain Impact Timeline

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


Alert N° Date (UTC) Max Rainfall (mm) Pop >100mm or higher 50-100 100-250 250-500 500-750 750-1000 >1000 Countries
Blue 1 13 Dec 2020 00:00 371 40 thousand
- - - Tuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga, Niue




Impact estimation for the next 72h
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StormSurge

0.3 m

The maximum Storm surge height is  0.3m in Koroinasolo, Fiji. This height is estimated for 13 Dec 2020 09:45 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.

Storm Surge Exposed population - AoIs


Storm Surge Exposed locations

Calculation based on the bulletin of 13 Dec 2020 00:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
13 Dec 2020 09:45 Koroinasolo Fiji  0.3
13 Dec 2020 09:45 Savu Sau Fiji  0.3
13 Dec 2020 09:45 Navinggiri Fiji  0.3
13 Dec 2020 09:45 Yangganga Fiji  0.3
13 Dec 2020 09:45 Nawailevu Fiji  0.3
13 Dec 2020 06:30 Natunuka Fiji  0.3
13 Dec 2020 06:30 Tavua Fiji  0.3
13 Dec 2020 06:30 Rabulu Fiji  0.3
13 Dec 2020 06:30 Togowere Fiji  0.3
13 Dec 2020 10:45 Korovou Fiji  0.3
13 Dec 2020 10:45 Lodoni Fiji  0.3
13 Dec 2020 10:45 Lawaki Fiji  0.3
13 Dec 2020 10:45 Naingani Fiji  0.3
13 Dec 2020 10:45 Navuti Fiji  0.3
13 Dec 2020 10:45 Nasaga Fiji  0.3
13 Dec 2020 10:45 Rukuruku Fiji  0.3
13 Dec 2020 10:45 Lovoni Fiji  0.3
13 Dec 2020 05:15 Lao Fiji  0.3
13 Dec 2020 05:15 Nailou Fiji  0.3
13 Dec 2020 05:15 Nawi Fiji  0.3
13 Dec 2020 05:15 Vunikura Fiji  0.3
13 Dec 2020 05:15 Napuka Fiji  0.3
13 Dec 2020 10:45 Ucunivanua Fiji  0.3
13 Dec 2020 06:45 Lautoka Fiji  0.3
13 Dec 2020 06:45 Nailanga Fiji  0.3
13 Dec 2020 06:45 Sorokoba Fiji  0.3
13 Dec 2020 06:45 Ba Fiji  0.3
13 Dec 2020 06:00 Rakiraki Fiji  0.3
13 Dec 2020 06:00 Vaileka Fiji  0.3
13 Dec 2020 06:00 Nanukuloa Fiji  0.3
13 Dec 2020 05:45 Nasau Fiji  0.2
13 Dec 2020 07:30 Namaka Fiji  0.2
13 Dec 2020 05:15 Malake Fiji  0.2
13 Dec 2020 05:15 Biagunu Fiji  0.2
13 Dec 2020 05:15 Namboutini Fiji  0.2
13 Dec 2020 05:00 Natua Fiji  0.2
13 Dec 2020 05:00 Mbangata Fiji  0.2
13 Dec 2020 05:00 Savusavu Fiji  0.2
13 Dec 2020 05:00 Naindi Fiji  0.2
13 Dec 2020 05:00 Korosi Fiji  0.2
13 Dec 2020 03:45 Korotasere Fiji  0.2
13 Dec 2020 03:45 Naweni Fiji  0.2
13 Dec 2020 03:45 Viani Fiji  0.2
13 Dec 2020 03:45 Ndrekeniwai Fiji  0.2
13 Dec 2020 03:45 Mbangasau Fiji  0.2
13 Dec 2020 05:15 Naua Fiji  0.2
13 Dec 2020 05:15 Tawake Fiji  0.2
13 Dec 2020 06:00 Nauouo Fiji  0.2
13 Dec 2020 06:00 Levuka Fiji  0.2
13 Dec 2020 03:45 Nakarambo Fiji  0.2
13 Dec 2020 06:15 Nayavutoka Fiji  0.2
13 Dec 2020 05:30 Nanduri Fiji  0.2
13 Dec 2020 05:30 Vatutandova Fiji  0.2
13 Dec 2020 05:30 Nasea Fiji  0.2
13 Dec 2020 05:00 Namukalau Fiji  0.2
13 Dec 2020 05:00 Nukusa Fiji  0.2
13 Dec 2020 05:30 Kasavu Fiji  0.2
13 Dec 2020 05:30 Nausori Fiji  0.2
13 Dec 2020 05:30 Lokia Fiji  0.2
13 Dec 2020 05:30 Naimasimasi Fiji  0.2
13 Dec 2020 05:30 Cautata Fiji  0.2
13 Dec 2020 05:30 Nasilai Fiji  0.2
13 Dec 2020 05:30 Dromuna Fiji  0.2
13 Dec 2020 08:45 Te Puia New Zealand  0.2
13 Dec 2020 08:45 Te Puia Springs New Zealand  0.2
13 Dec 2020 08:45 Tokomaru Bay New Zealand  0.2
13 Dec 2020 08:45 Waipiro New Zealand  0.2
13 Dec 2020 08:45 Waipiro Bay New Zealand  0.2
13 Dec 2020 08:45 Whareponga New Zealand  0.2
13 Dec 2020 08:45 Tuparoa New Zealand  0.2
13 Dec 2020 06:30 Nasarowangga Fiji  0.2
13 Dec 2020 05:15 Vunivatu Fiji  0.2
13 Dec 2020 05:15 Navukembuli Fiji  0.2
13 Dec 2020 05:15 Nambouono Fiji  0.2
13 Dec 2020 05:45 Vangai Fiji  0.2
13 Dec 2020 07:15 Solevu Fiji  0.2
13 Dec 2020 06:15 Ndalomo Fiji  0.2
13 Dec 2020 05:45 Nagumu Fiji  0.2
13 Dec 2020 05:30 Ndaria Fiji  0.2
13 Dec 2020 05:30 Rave-rave Fiji  0.2
13 Dec 2020 05:30 Ndawara Fiji  0.2
13 Dec 2020 05:30 Waisa Fiji  0.2
13 Dec 2020 07:15 Tavua Fiji  0.2
13 Dec 2020 06:00 Ndenimanu Fiji  0.2
13 Dec 2020 09:30 Navindamu Fiji  0.2
13 Dec 2020 04:00 Soso Fiji  0.1
13 Dec 2020 04:00 Somosomo Fiji  0.1
13 Dec 2020 04:00 Matayalevu Fiji  0.1
13 Dec 2020 04:00 Matacawalevu Fiji  0.1
13 Dec 2020 04:00 Sisili Fiji  0.1
13 Dec 2020 04:30 Tonga Tuvalu  0.1
13 Dec 2020 06:00 Nacula Fiji  0.1
13 Dec 2020 06:00 Navotua Fiji  0.1
13 Dec 2020 06:00 Tamusua Fiji  0.1
13 Dec 2020 06:00 Teci Fiji  0.1
13 Dec 2020 06:00 Mbukama Fiji  0.1
13 Dec 2020 06:00 Yasawairara Fiji  0.1
13 Dec 2020 05:30 Nalauwaki Fiji  0.1
13 Dec 2020 04:30 Lakina Tuvalu  0.1
13 Dec 2020 04:45 Vaitupu Tuvalu  0.1
13 Dec 2020 05:15 Gasele Fiji  0.1
13 Dec 2020 05:15 Soso Fiji  0.1
13 Dec 2020 05:15 Kavala Fiji  0.1
13 Dec 2020 05:15 Kaduvu Fiji  0.1
13 Dec 2020 05:15 Nukuvou Fiji  0.1
13 Dec 2020 05:15 Nabouwalu Fiji  0.1
13 Dec 2020 05:15 Vabea Fiji  0.1
13 Dec 2020 02:45 Nabouwalu Fiji  0.1
13 Dec 2020 02:45 Thavanga Fiji  0.1
13 Dec 2020 04:45 Elsee Fiji  0.1
13 Dec 2020 04:45 Sumi Fiji  0.1
13 Dec 2020 06:00 Naruwai Fiji  0.1
13 Dec 2020 06:15 Galoa Fiji  0.1
13 Dec 2020 06:15 Yanutha Fiji  0.1
13 Dec 2020 06:15 Matavuralevu Fiji  0.1
13 Dec 2020 06:15 Pacific Harbour Fiji  0.1
13 Dec 2020 06:15 Waisomo Fiji  0.1
13 Dec 2020 06:15 Dakuimbeqa Fiji  0.1
13 Dec 2020 06:15 Lalati Fiji  0.1
13 Dec 2020 06:15 Navua Fiji  0.1
13 Dec 2020 06:15 Naitionitoni Fiji  0.1
13 Dec 2020 06:15 Mau Fiji  0.1
13 Dec 2020 07:00 Nasau Fiji  0.1
13 Dec 2020 07:00 Talaulia Fiji  0.1
13 Dec 2020 07:00 Nalotu Fiji  0.1
13 Dec 2020 07:00 Vunisea Fiji  0.1
13 Dec 2020 07:00 Mburelevu Fiji  0.1
13 Dec 2020 07:00 Mokoisa Fiji  0.1
13 Dec 2020 07:00 Naikorokoro Fiji  0.1
13 Dec 2020 07:00 Namara Fiji  0.1
13 Dec 2020 07:00 Nadi Fiji  0.1
13 Dec 2020 12:00 Otumoetai New Zealand  0.1
13 Dec 2020 12:00 Mount Maunganui New Zealand  0.1
13 Dec 2020 12:00 Matapihi New Zealand  0.1
13 Dec 2020 12:00 Kairua New Zealand  0.1
13 Dec 2020 12:00 Papamoa New Zealand  0.1
13 Dec 2020 11:30 Opoutere New Zealand  0.1
13 Dec 2020 11:30 Whangamata New Zealand  0.1
13 Dec 2020 07:00 Momi Fiji  0.1
13 Dec 2020 08:45 Port Awanui New Zealand  0.1
13 Dec 2020 05:45 Makongai Fiji  0.1
13 Dec 2020 05:00 Korovou Fiji  0.1
13 Dec 2020 05:30 Nakondu Fiji  0.1
13 Dec 2020 05:30 Nathamaki Fiji  0.1
13 Dec 2020 05:30 Nasau Fiji  0.1
13 Dec 2020 02:30 Navakawau Fiji  0.1
13 Dec 2020 12:00 Maketu New Zealand  0.1
13 Dec 2020 12:00 Maniatutu New Zealand  0.1
13 Dec 2020 05:00 Sawaieke Fiji  0.1
13 Dec 2020 05:00 Vione Fiji  0.1
13 Dec 2020 05:00 Dalice Fiji  0.1
13 Dec 2020 02:45 Keteira Fiji  0.1