Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga
14 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, Niue
Exposed population No people in Category 1 or higher
Maximum wind speed 79 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 79 km/h 0.6 m 22 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 14 Dec 2020 00:00 UTC
CategoryCountryPopulation 
Tropical StormTonga, Niue22,171
+
Tonga20,981 
Niue1,190 

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 72 -
- - - - - Tonga
GREEN 3 14 Dec 2020 00:00 108 -
- - - - - Tonga, Niue
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 14 Dec 2020 00:00 UTC
LevelCountryPopulation 
250-500 mmSamoa, Tonga29,236
+
Samoa14,118 
Tonga15,118 
100-250 mmWallis and Futuna, Samoa, Tonga, Fiji, Niue315,875
+
Fiji136,842 
Wallis and Futuna12,963 
Samoa163,510 
Tonga1,370 
Niue1,190 
50-100 mmTuvalu, Fiji, Samoa, American Samoa, Wallis and Futuna, Tonga706,015
+
Tuvalu481 
Fiji629,636 
Wallis and Futuna2,598 
Samoa19,000 
American Samoa53,380 
Tonga920 

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 20 10 thousand - - - - - - Tonga
Blue 3 14 Dec 2020 00:00 519 350 thousand
- - - Tuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga, Niue




Impact estimation for the next 72h
TOP

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 14 Dec 2020 00:00 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
15 Dec 2020 08:15 Natunuka Fiji  0.5
15 Dec 2020 08:15 Tavua Fiji  0.5
15 Dec 2020 11:45 Namaka Fiji  0.5
14 Dec 2020 01:15 Korovou Fiji  0.5
14 Dec 2020 01:15 Lodoni Fiji  0.5
14 Dec 2020 01:15 Lawaki Fiji  0.5
14 Dec 2020 01:15 Naingani Fiji  0.5
14 Dec 2020 01:15 Navuti Fiji  0.5
14 Dec 2020 01:15 Nasaga Fiji  0.5
14 Dec 2020 01:15 Rukuruku Fiji  0.5
14 Dec 2020 01:15 Lovoni Fiji  0.5
15 Dec 2020 00:45 Rabulu Fiji  0.5
15 Dec 2020 00:45 Togowere Fiji  0.5
14 Dec 2020 01:15 Ucunivanua Fiji  0.5
15 Dec 2020 00:15 Koroinasolo Fiji  0.4
15 Dec 2020 00:15 Savu Sau Fiji  0.4
15 Dec 2020 00:15 Navinggiri Fiji  0.4
15 Dec 2020 00:15 Yangganga Fiji  0.4
15 Dec 2020 00:15 Nawailevu Fiji  0.4
15 Dec 2020 08:15 Solevu Fiji  0.4
14 Dec 2020 01:15 Nauouo Fiji  0.4
14 Dec 2020 01:15 Levuka Fiji  0.4
15 Dec 2020 08:15 Nalauwaki Fiji  0.4
15 Dec 2020 08:15 Soso Fiji  0.4
15 Dec 2020 08:15 Somosomo Fiji  0.4
15 Dec 2020 08:15 Tavua Fiji  0.3
14 Dec 2020 00:00 Lao Fiji  0.3
14 Dec 2020 00:00 Nailou Fiji  0.3
14 Dec 2020 00:00 Nawi Fiji  0.3
14 Dec 2020 00:00 Vunikura Fiji  0.3
14 Dec 2020 00:00 Napuka Fiji  0.3
14 Dec 2020 01:15 Kasavu Fiji  0.3
14 Dec 2020 01:15 Naimasimasi Fiji  0.3
15 Dec 2020 08:00 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
14 Dec 2020 10:45 Korosi Fiji  0.3
14 Dec 2020 10:45 Korotasere Fiji  0.3
14 Dec 2020 10:45 Naweni Fiji  0.3
14 Dec 2020 10:45 Viani Fiji  0.3
14 Dec 2020 10:45 Ndrekeniwai Fiji  0.3
14 Dec 2020 10:45 Mbangasau 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
16 Dec 2020 16:15 Natua Fiji  0.3
16 Dec 2020 16:15 Mbangata Fiji  0.3
16 Dec 2020 16:15 Savusavu Fiji  0.3
16 Dec 2020 16:15 Naindi Fiji  0.3
14 Dec 2020 18:00 Maketu New Zealand  0.3
14 Dec 2020 18:00 Maniatutu New Zealand  0.3
14 Dec 2020 18:00 Pukehina New Zealand  0.3
14 Dec 2020 18:00 Ohinepanea New Zealand  0.3
14 Dec 2020 18:00 Otamarakau New Zealand  0.3
14 Dec 2020 18:00 Pikowai New Zealand  0.3
15 Dec 2020 00:00 Nasarowangga Fiji  0.3
15 Dec 2020 08:00 Matacawalevu Fiji  0.3
15 Dec 2020 08:00 Sisili Fiji  0.3
15 Dec 2020 00:00 Navindamu Fiji  0.3
15 Dec 2020 00:00 Nagumu Fiji  0.3
14 Dec 2020 00:30 Rakiraki Fiji  0.3
14 Dec 2020 00:30 Vaileka Fiji  0.3
14 Dec 2020 00:30 Nanukuloa Fiji  0.3
14 Dec 2020 00:30 Nasau Fiji  0.3
15 Dec 2020 08:30 Nakarambo Fiji  0.2
15 Dec 2020 00:30 Ndalomo Fiji  0.2
15 Dec 2020 08:00 Malake Fiji  0.2
15 Dec 2020 08:00 Biagunu Fiji  0.2
14 Dec 2020 00:00 Vangai Fiji  0.2
16 Dec 2020 16:30 Nadi Fiji  0.2
15 Dec 2020 07:45 Nayavutoka Fiji  0.2
14 Dec 2020 13:45 Vunivatu Fiji  0.2
14 Dec 2020 13:45 Navukembuli Fiji  0.2
14 Dec 2020 13:45 Naua Fiji  0.2
16 Dec 2020 16:15 Ndawara Fiji  0.2
16 Dec 2020 16:15 Waisa Fiji  0.2
15 Dec 2020 00:30 Ndenimanu Fiji  0.2
16 Dec 2020 15:45 Ndaria Fiji  0.2
16 Dec 2020 15:45 Rave-rave 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
14 Dec 2020 00:15 Namboutini Fiji  0.2
14 Dec 2020 06:45 Waihi Beach New Zealand  0.2
14 Dec 2020 06:45 Athenree New Zealand  0.2
15 Dec 2020 00:45 Nacula Fiji  0.2
15 Dec 2020 00:45 Navotua Fiji  0.2
15 Dec 2020 00:45 Tamusua Fiji  0.2
14 Dec 2020 16:00 Nausori Fiji  0.2
14 Dec 2020 16:00 Lokia Fiji  0.2
14 Dec 2020 16:00 Cautata Fiji  0.2
14 Dec 2020 16:00 Nasilai Fiji  0.2
14 Dec 2020 16:00 Dromuna Fiji  0.2
14 Dec 2020 13:30 Nabouwalu Fiji  0.2
14 Dec 2020 13:30 Thavanga Fiji  0.2
15 Dec 2020 00:30 Teci Fiji  0.2
15 Dec 2020 00:30 Mbukama Fiji  0.2
15 Dec 2020 00:30 Yasawairara Fiji  0.2
16 Dec 2020 16:15 Momi Fiji  0.2
14 Dec 2020 00:45 Gasele Fiji  0.2
14 Dec 2020 00:45 Soso Fiji  0.2
14 Dec 2020 00:45 Kavala Fiji  0.2
14 Dec 2020 00:45 Kaduvu Fiji  0.2
14 Dec 2020 00:45 Nukuvou Fiji  0.2
14 Dec 2020 00:45 Nabouwalu Fiji  0.2
14 Dec 2020 00:45 Vabea Fiji  0.2
15 Dec 2020 00:30 Naruwai Fiji  0.2
14 Dec 2020 13:45 Namukalau Fiji  0.2
16 Dec 2020 08:15 Tawake Fiji  0.2
16 Dec 2020 16:00 Nasau Fiji  0.2
16 Dec 2020 16:00 Talaulia Fiji  0.2
16 Dec 2020 16:00 Nalotu Fiji  0.2
16 Dec 2020 16:00 Vunisea Fiji  0.2
16 Dec 2020 16:00 Mburelevu Fiji  0.2
16 Dec 2020 16:00 Mokoisa Fiji  0.2
16 Dec 2020 16:00 Naikorokoro Fiji  0.2
16 Dec 2020 16:00 Namara 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
16 Dec 2020 18:00 Elsee Fiji  0.2
16 Dec 2020 18:00 Sumi Fiji  0.2
16 Dec 2020 16:30 Galoa Fiji  0.2
16 Dec 2020 16:30 Yanutha Fiji  0.2
16 Dec 2020 16:30 Matavuralevu Fiji  0.2
16 Dec 2020 16:30 Pacific Harbour Fiji  0.2
16 Dec 2020 16:30 Waisomo Fiji  0.2
16 Dec 2020 16:30 Dakuimbeqa Fiji  0.2
16 Dec 2020 16:30 Lalati Fiji  0.2
16 Dec 2020 16:30 Navua Fiji  0.2
16 Dec 2020 16:30 Naitionitoni Fiji  0.2
16 Dec 2020 16:30 Mau Fiji  0.2
14 Dec 2020 17:45 Matata New Zealand  0.2
14 Dec 2020 17:45 Awakaponga New Zealand  0.2
14 Dec 2020 17:45 Thornton New Zealand  0.2
14 Dec 2020 17:45 Poroporo New Zealand  0.2
14 Dec 2020 17:45 Whakatane New Zealand  0.2
16 Dec 2020 17:15 Nukusa Fiji  0.1
16 Dec 2020 17:15 Nambouono Fiji  0.1
16 Dec 2020 15:45 Makongai Fiji  0.1
16 Dec 2020 08:45 Tonga Tuvalu  0.1
14 Dec 2020 06:15 Opoutere New Zealand  0.1
14 Dec 2020 06:15 Whangamata New Zealand  0.1
16 Dec 2020 15:30 Korovisilou Fiji  0.1
16 Dec 2020 08:45 Lakina Tuvalu  0.1
15 Dec 2020 07:15 Korovou Fiji  0.1
16 Dec 2020 16:15 Lomawal Fiji  0.1
16 Dec 2020 16:15 Mbatiri Fiji  0.1
16 Dec 2020 08:45 Vaitupu Tuvalu  0.1
15 Dec 2020 09:30 Keteira Fiji  0.1
14 Dec 2020 06:30 Tairua New Zealand  0.1
14 Dec 2020 06:30 Pauanui New Zealand  0.1
16 Dec 2020 15:45 Vione Fiji  0.1
16 Dec 2020 15:45 Dalice Fiji  0.1
16 Dec 2020 16:00 Cuvu Fiji  0.1
16 Dec 2020 16:00 Sigatoka Fiji  0.1
16 Dec 2020 16:00 Laselase Fiji  0.1
16 Dec 2020 16:15 Kalokolevu Fiji  0.1
16 Dec 2020 15:45 Sawaieke Fiji  0.1
16 Dec 2020 16:00 Vatukarasa Fiji  0.1
16 Dec 2020 16:00 Korolevu Fiji  0.1
16 Dec 2020 16:00 Bouwanga Fiji  0.1
16 Dec 2020 16:00 Taunovo Fiji  0.1
15 Dec 2020 07:15 Navakawau Fiji  0.1
16 Dec 2020 03:30 Port Awanui New Zealand  0.1
16 Dec 2020 03:30 Rangitukia New Zealand  0.1
16 Dec 2020 15:45 Laucala Fiji  0.1
16 Dec 2020 16:15 Suva Fiji  0.1
16 Dec 2020 16:15 Tamavua Fiji  0.1
16 Dec 2020 16:15 Lauthala Bay Fiji  0.1
15 Dec 2020 18:30 Andako Fiji  0.1
16 Dec 2020 15:45 Vandravandra Fiji  0.1