Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga
13 Dec 2020 12 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 72 km/h
Maximum storm surge 0.6 m (15 Dec 08:15 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 72 km/h 0.6 m 20 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)

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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 12:00 UTC
CategoryCountryPopulation 
Tropical StormTonga15,922 

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 65 - - - - - - -
GREEN 2 13 Dec 2020 12:00 115 -
- - - - - 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 12:00 UTC
LevelCountryPopulation 
250-500 mmSamoa, Tonga19,876
+
Samoa9,069 
Tonga10,807 
100-250 mmSamoa, Tonga, Fiji232,685
+
Fiji71,513 
Samoa155,491 
Tonga5,681 
50-100 mmTuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga, Niue306,510
+
Tuvalu39 
Fiji249,728 
Wallis and Futuna15,561 
Samoa32,068 
American Samoa7,659 
Tonga265 
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 18 - - - - - - -
Blue 2 13 Dec 2020 12:00 566 250 thousand
- - - Tuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga, Niue




Impact estimation for the next 72h
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StormSurge

0.6 m

The maximum Storm surge height is  0.6m in Lautoka, Fiji. This height is estimated for 15 Dec 2020 08:15 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 12:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
15 Dec 2020 08:15 Lautoka Fiji  0.6
15 Dec 2020 08:15 Nailanga Fiji  0.6
15 Dec 2020 08:15 Sorokoba Fiji  0.6
15 Dec 2020 08:15 Ba Fiji  0.6
13 Dec 2020 13:15 Korovou Fiji  0.5
13 Dec 2020 13:15 Lodoni Fiji  0.5
13 Dec 2020 13:15 Lawaki Fiji  0.5
13 Dec 2020 13:15 Naingani Fiji  0.5
13 Dec 2020 13:15 Navuti Fiji  0.5
13 Dec 2020 13:15 Nasaga Fiji  0.5
13 Dec 2020 13:15 Rukuruku Fiji  0.5
13 Dec 2020 13:15 Lovoni Fiji  0.5
15 Dec 2020 08:15 Natunuka Fiji  0.5
15 Dec 2020 08:15 Tavua Fiji  0.5
13 Dec 2020 18:00 Ucunivanua Fiji  0.5
13 Dec 2020 17:30 Namaka Fiji  0.5
15 Dec 2020 01:00 Rabulu Fiji  0.4
15 Dec 2020 01:00 Togowere Fiji  0.4
15 Dec 2020 00:30 Koroinasolo Fiji  0.4
15 Dec 2020 00:30 Savu Sau Fiji  0.4
15 Dec 2020 00:30 Navinggiri Fiji  0.4
15 Dec 2020 00:30 Yangganga Fiji  0.4
15 Dec 2020 00:30 Nawailevu Fiji  0.4
13 Dec 2020 13:00 Nauouo Fiji  0.4
13 Dec 2020 13:00 Levuka Fiji  0.4
15 Dec 2020 08:15 Solevu Fiji  0.4
15 Dec 2020 08:15 Soso Fiji  0.3
15 Dec 2020 08:15 Somosomo Fiji  0.3
15 Dec 2020 08:15 Nalauwaki Fiji  0.3
13 Dec 2020 14:30 Lao Fiji  0.3
13 Dec 2020 14:30 Nailou Fiji  0.3
13 Dec 2020 14:30 Nawi Fiji  0.3
13 Dec 2020 14:30 Vunikura Fiji  0.3
13 Dec 2020 14:30 Napuka Fiji  0.3
13 Dec 2020 13:00 Kasavu Fiji  0.3
13 Dec 2020 13:00 Naimasimasi Fiji  0.3
15 Dec 2020 08:15 Tavua Fiji  0.3
15 Dec 2020 08:30 Matayalevu Fiji  0.3
14 Dec 2020 18:15 Otumoetai New Zealand  0.3
14 Dec 2020 18:15 Mount Maunganui New Zealand  0.3
14 Dec 2020 18:15 Matapihi New Zealand  0.3
14 Dec 2020 18:15 Kairua New Zealand  0.3
14 Dec 2020 18:15 Papamoa New Zealand  0.3
15 Dec 2020 18:15 Korosi Fiji  0.3
15 Dec 2020 18:15 Korotasere Fiji  0.3
15 Dec 2020 18:15 Naweni Fiji  0.3
15 Dec 2020 18:15 Viani Fiji  0.3
15 Dec 2020 18:15 Ndrekeniwai Fiji  0.3
15 Dec 2020 18:15 Mbangasau Fiji  0.3
13 Dec 2020 13:15 Rakiraki Fiji  0.3
13 Dec 2020 13:15 Vaileka Fiji  0.3
13 Dec 2020 13:15 Nanukuloa Fiji  0.3
13 Dec 2020 13:15 Nasau Fiji  0.3
14 Dec 2020 23:45 Nanduri Fiji  0.3
14 Dec 2020 23:45 Vatutandova Fiji  0.3
14 Dec 2020 23:45 Nasea Fiji  0.3
15 Dec 2020 00:00 Nasarowangga Fiji  0.3
13 Dec 2020 13:00 Nayavutoka Fiji  0.3
13 Dec 2020 14:45 Natua Fiji  0.3
13 Dec 2020 14:45 Mbangata Fiji  0.3
13 Dec 2020 14:45 Savusavu Fiji  0.3
13 Dec 2020 14:45 Naindi Fiji  0.3
13 Dec 2020 13:45 Matacawalevu Fiji  0.3
13 Dec 2020 13:45 Sisili Fiji  0.3
13 Dec 2020 14:15 Nakarambo Fiji  0.3
14 Dec 2020 23:45 Navindamu Fiji  0.3
14 Dec 2020 23:45 Nagumu Fiji  0.3
15 Dec 2020 00:30 Ndalomo Fiji  0.2
14 Dec 2020 06:45 Waihi Beach New Zealand  0.2
14 Dec 2020 06:45 Athenree New Zealand  0.2
14 Dec 2020 00:00 Vangai Fiji  0.2
14 Dec 2020 18:00 Maketu New Zealand  0.2
14 Dec 2020 18:00 Maniatutu New Zealand  0.2
14 Dec 2020 18:00 Pukehina New Zealand  0.2
14 Dec 2020 18:00 Ohinepanea New Zealand  0.2
14 Dec 2020 18:00 Otamarakau New Zealand  0.2
14 Dec 2020 18:00 Pikowai New Zealand  0.2
13 Dec 2020 13:30 Nacula Fiji  0.2
13 Dec 2020 13:30 Navotua Fiji  0.2
13 Dec 2020 13:30 Tamusua Fiji  0.2
15 Dec 2020 00:45 Ndenimanu Fiji  0.2
15 Dec 2020 08:15 Malake Fiji  0.2
15 Dec 2020 08:15 Biagunu Fiji  0.2
13 Dec 2020 14:00 Gasele Fiji  0.2
13 Dec 2020 14:00 Soso Fiji  0.2
13 Dec 2020 14:00 Kavala Fiji  0.2
13 Dec 2020 14:00 Kaduvu Fiji  0.2
13 Dec 2020 14:00 Nukuvou Fiji  0.2
13 Dec 2020 14:00 Nabouwalu Fiji  0.2
13 Dec 2020 14:00 Vabea Fiji  0.2
15 Dec 2020 00:30 Vunivatu Fiji  0.2
15 Dec 2020 00:30 Navukembuli Fiji  0.2
13 Dec 2020 13:00 Nausori Fiji  0.2
13 Dec 2020 13:00 Lokia Fiji  0.2
13 Dec 2020 13:00 Cautata Fiji  0.2
13 Dec 2020 13:00 Nasilai Fiji  0.2
13 Dec 2020 13:00 Dromuna Fiji  0.2
14 Dec 2020 00:15 Namboutini Fiji  0.2
15 Dec 2020 08:45 Nadi Fiji  0.2
13 Dec 2020 13:30 Teci Fiji  0.2
14 Dec 2020 19:00 Te Puia New Zealand  0.2
14 Dec 2020 19:00 Te Puia Springs New Zealand  0.2
14 Dec 2020 19:00 Tokomaru Bay New Zealand  0.2
14 Dec 2020 19:00 Waipiro New Zealand  0.2
14 Dec 2020 19:00 Waipiro Bay New Zealand  0.2
14 Dec 2020 19:00 Whareponga New Zealand  0.2
14 Dec 2020 19:00 Tuparoa New Zealand  0.2
13 Dec 2020 12:45 Nabouwalu Fiji  0.2
13 Dec 2020 12:45 Thavanga Fiji  0.2
13 Dec 2020 12:45 Ndaria Fiji  0.2
13 Dec 2020 12:45 Rave-rave Fiji  0.2
14 Dec 2020 13:45 Naua Fiji  0.2
15 Dec 2020 00:30 Namukalau Fiji  0.2
13 Dec 2020 13:30 Mbukama Fiji  0.2
13 Dec 2020 13:30 Yasawairara Fiji  0.2
15 Dec 2020 00:30 Naruwai Fiji  0.2
13 Dec 2020 14:30 Ndawara Fiji  0.2
13 Dec 2020 14:30 Waisa Fiji  0.2
15 Dec 2020 09:45 Nakondu Fiji  0.2
15 Dec 2020 09:45 Nathamaki Fiji  0.2
15 Dec 2020 09:45 Nasau Fiji  0.2
13 Dec 2020 14:45 Tawake Fiji  0.2
13 Dec 2020 12:30 Nasau Fiji  0.2
13 Dec 2020 12:30 Talaulia Fiji  0.2
13 Dec 2020 12:30 Nalotu Fiji  0.2
13 Dec 2020 12:30 Vunisea Fiji  0.2
13 Dec 2020 12:30 Mburelevu Fiji  0.2
13 Dec 2020 12:30 Mokoisa Fiji  0.2
13 Dec 2020 12:30 Naikorokoro Fiji  0.2
13 Dec 2020 12:30 Namara Fiji  0.2
15 Dec 2020 08:45 Momi Fiji  0.2
16 Dec 2020 08:15 Sumi Fiji  0.2
16 Dec 2020 08:15 Elsee Fiji  0.2
14 Dec 2020 06:15 Opoutere New Zealand  0.2
14 Dec 2020 06:15 Whangamata New Zealand  0.2
16 Dec 2020 08:00 Nukusa Fiji  0.1
16 Dec 2020 08:00 Nambouono Fiji  0.1
13 Dec 2020 14:00 Galoa Fiji  0.1
13 Dec 2020 14:00 Yanutha Fiji  0.1
13 Dec 2020 14:00 Matavuralevu Fiji  0.1
13 Dec 2020 14:00 Pacific Harbour Fiji  0.1
13 Dec 2020 14:00 Waisomo Fiji  0.1
13 Dec 2020 14:00 Dakuimbeqa Fiji  0.1
13 Dec 2020 14:00 Lalati Fiji  0.1
13 Dec 2020 14:00 Navua Fiji  0.1
13 Dec 2020 14:00 Naitionitoni Fiji  0.1
13 Dec 2020 14:00 Mau Fiji  0.1
13 Dec 2020 16:30 Lakina Tuvalu  0.1
16 Dec 2020 09:00 Tonga Tuvalu  0.1
16 Dec 2020 09:00 Vaitupu Tuvalu  0.1
15 Dec 2020 09:30 Vione Fiji  0.1
15 Dec 2020 09:30 Dalice Fiji  0.1
15 Dec 2020 07:45 Korovisilou Fiji  0.1
15 Dec 2020 09:45 Korovou Fiji  0.1
15 Dec 2020 16:30 Matata New Zealand  0.1
15 Dec 2020 16:30 Awakaponga New Zealand  0.1
15 Dec 2020 16:30 Thornton New Zealand  0.1
15 Dec 2020 16:30 Poroporo New Zealand  0.1
15 Dec 2020 16:30 Whakatane New Zealand  0.1
15 Dec 2020 09:30 Keteira Fiji  0.1
15 Dec 2020 09:30 Navakawau Fiji  0.1
15 Dec 2020 09:45 Sawaieke Fiji  0.1
15 Dec 2020 19:00 Makongai Fiji  0.1
15 Dec 2020 18:30 Kalokolevu Fiji  0.1
15 Dec 2020 18:30 Andako Fiji  0.1
15 Dec 2020 09:45 Vandravandra Fiji  0.1
15 Dec 2020 18:30 Suva Fiji  0.1
15 Dec 2020 18:30 Tamavua Fiji  0.1
15 Dec 2020 18:30 Lauthala Bay Fiji  0.1
15 Dec 2020 18:30 Laucala Fiji  0.1
15 Dec 2020 18:15 Bouwanga Fiji  0.1
15 Dec 2020 18:15 Taunovo Fiji  0.1
13 Dec 2020 14:00 Lomawal Fiji  0.1
14 Dec 2020 06:30 Tairua New Zealand  0.1
14 Dec 2020 06:30 Pauanui New Zealand  0.1
13 Dec 2020 14:00 Mbatiri Fiji  0.1
15 Dec 2020 18:00 Sigatoka Fiji  0.1
15 Dec 2020 18:00 Laselase Fiji  0.1
15 Dec 2020 18:00 Vatukarasa Fiji  0.1
15 Dec 2020 18:00 Korolevu Fiji  0.1
15 Dec 2020 18:00 Cuvu Fiji  0.1