Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga
16 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 GFS
Exposed countries Fiji, Niue
Exposed population 310 thousand in Category 1 or higher
Maximum wind speed 122 km/h
Maximum storm surge 1.3 m (17 Dec 05:15 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
GFS Current 122 km/h 1.3 m 34 mm 0.5
GFS Overall 281 km/h 1.1 m 672 mm 1.5

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

TOP

Wind

281 km/h

Up to 310 thousand in Category 1 strength or higher (see SSHS)



Wind exposed population - AoIs

Estimations based on the bulletin of 16 Dec 2020 00:00 UTC
CategoryCountryPopulation 
CAT. 3Fiji12,736 
CAT. 2Fiji105,711 
CAT. 1Fiji186,690 
Tropical StormFiji, Niue552,455
+
Fiji551,265 
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 12:00 68 -
- - - - - Tonga
GREEN 2 13 Dec 2020 18:00 68 -
- - - - - Tonga
GREEN 3 14 Dec 2020 00:00 79 - - - - - - -
GREEN 4 14 Dec 2020 06:00 94 -
- - - - - Tonga
GREEN 5 14 Dec 2020 12:00 97 -
- - - - - Tonga
GREEN 6 14 Dec 2020 18:00 90 -
- - - - - Tonga
GREEN 7 15 Dec 2020 00:00 112 -
- - - - - Tonga
GREEN 8 15 Dec 2020 06:00 112 -
- - - - - Niue
GREEN 9 15 Dec 2020 12:00 97 -
- - - - - Niue
GREEN 10 15 Dec 2020 18:00 104 -
- - - - - Niue
GREEN 11 16 Dec 2020 00:00 220 310 thousand
- - Fiji, Niue
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 16 Dec 2020 00:00 UTC
LevelCountryPopulation 
500-750 mmFiji154 
250-500 mmFiji722,479 
100-250 mmFiji129,919 
50-100 mmTuvalu, Fiji, Wallis and Futuna, Samoa, Tonga, Niue266,761
+
Tuvalu39 
Fiji50,655 
Wallis and Futuna15,561 
Samoa176,460 
Tonga23,623 
Niue423 

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 12:00 19 Few people - - - - - - Tonga
Blue 2 13 Dec 2020 18:00 19 Few people - - - - - - Tonga
Blue 3 14 Dec 2020 00:00 22 - - - - - - -
Blue 4 14 Dec 2020 06:00 26 20 thousand - - - - - - Tonga
Blue 5 14 Dec 2020 12:00 27 20 thousand - - - - - - Tonga
Blue 6 14 Dec 2020 18:00 25 20 thousand - - - - - - Tonga
Blue 7 15 Dec 2020 00:00 31 20 thousand - - - - - - Tonga
Blue 8 15 Dec 2020 06:00 31 1 thousand - - - - - - Niue
Blue 9 15 Dec 2020 12:00 27 1 thousand - - - - - - Niue
Blue 10 15 Dec 2020 18:00 29 1 thousand - - - - - - Niue
Blue 11 16 Dec 2020 00:00 551 850 thousand
- - Tuvalu, Fiji, Wallis and Futuna, Samoa, Tonga, Niue




Impact estimation for the next 72h
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StormSurge

1.3 m

The maximum Storm surge height is  1.3m in Matacawalevu, Fiji. This height is estimated for 17 Dec 2020 05:15 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 16 Dec 2020 00:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
17 Dec 2020 05:15 Matacawalevu Fiji  1.3
17 Dec 2020 05:15 Sisili Fiji  1.3
17 Dec 2020 05:15 Nacula Fiji  1.3
17 Dec 2020 05:15 Navotua Fiji  1.3
17 Dec 2020 05:15 Tamusua Fiji  1.3
17 Dec 2020 05:15 Teci Fiji  1.3
17 Dec 2020 05:15 Mbukama Fiji  1.3
17 Dec 2020 05:15 Yasawairara Fiji  1.3
17 Dec 2020 06:30 Natunuka Fiji  1.2
17 Dec 2020 06:30 Tavua Fiji  1.2
17 Dec 2020 06:30 Rabulu Fiji  1.2
17 Dec 2020 06:30 Togowere Fiji  1.2
17 Dec 2020 09:00 Soso Fiji  1.2
17 Dec 2020 09:00 Somosomo Fiji  1.2
17 Dec 2020 05:30 Nailanga Fiji  1.1
17 Dec 2020 05:30 Sorokoba Fiji  1.1
17 Dec 2020 05:30 Ba Fiji  1.1
17 Dec 2020 05:15 Nalauwaki Fiji  1.1
17 Dec 2020 04:30 Lautoka Fiji  1.1
17 Dec 2020 01:15 Matayalevu Fiji  1.0
17 Dec 2020 09:30 Rakiraki Fiji  0.9
17 Dec 2020 09:30 Vaileka Fiji  0.9
17 Dec 2020 09:30 Nanukuloa Fiji  0.9
17 Dec 2020 04:45 Tavua Fiji  0.9
17 Dec 2020 09:30 Nasau Fiji  0.8
17 Dec 2020 04:30 Solevu Fiji  0.8
17 Dec 2020 04:30 Namaka Fiji  0.7
17 Dec 2020 09:30 Koroinasolo Fiji  0.7
17 Dec 2020 09:30 Savu Sau Fiji  0.7
17 Dec 2020 09:30 Navinggiri Fiji  0.7
17 Dec 2020 09:30 Yangganga Fiji  0.7
17 Dec 2020 09:30 Nawailevu Fiji  0.7
17 Dec 2020 09:30 Nayavutoka Fiji  0.7
17 Dec 2020 09:45 Ndalomo Fiji  0.6
17 Dec 2020 06:15 Navindamu Fiji  0.6
17 Dec 2020 06:15 Nagumu Fiji  0.6
17 Dec 2020 10:45 Kasavu Fiji  0.6
17 Dec 2020 10:45 Nausori Fiji  0.6
17 Dec 2020 10:45 Korovou Fiji  0.6
17 Dec 2020 10:45 Lokia Fiji  0.6
17 Dec 2020 10:45 Naimasimasi Fiji  0.6
17 Dec 2020 10:45 Ucunivanua Fiji  0.6
17 Dec 2020 10:45 Cautata Fiji  0.6
17 Dec 2020 10:45 Nasilai Fiji  0.6
17 Dec 2020 10:45 Dromuna Fiji  0.6
17 Dec 2020 09:30 Nasarowangga Fiji  0.6
17 Dec 2020 09:45 Lawaki Fiji  0.6
17 Dec 2020 09:45 Lodoni Fiji  0.5
17 Dec 2020 09:45 Naingani Fiji  0.5
17 Dec 2020 06:15 Ndenimanu Fiji  0.5
17 Dec 2020 19:00 Galoa Fiji  0.5
17 Dec 2020 19:00 Yanutha Fiji  0.5
17 Dec 2020 19:00 Matavuralevu Fiji  0.5
17 Dec 2020 19:00 Pacific Harbour Fiji  0.5
17 Dec 2020 19:00 Waisomo Fiji  0.5
17 Dec 2020 19:00 Dakuimbeqa Fiji  0.5
17 Dec 2020 19:00 Lalati Fiji  0.5
17 Dec 2020 19:00 Navua Fiji  0.5
17 Dec 2020 19:00 Naitionitoni Fiji  0.5
17 Dec 2020 19:00 Mau Fiji  0.5
17 Dec 2020 03:15 Navuti Fiji  0.5
17 Dec 2020 03:15 Nasaga Fiji  0.5
17 Dec 2020 03:15 Rukuruku Fiji  0.5
17 Dec 2020 03:15 Lovoni Fiji  0.5
17 Dec 2020 08:45 Nanduri Fiji  0.5
17 Dec 2020 08:45 Vatutandova Fiji  0.5
17 Dec 2020 08:45 Nasea Fiji  0.5
17 Dec 2020 13:45 Nadi Fiji  0.5
17 Dec 2020 16:00 Nauouo Fiji  0.4
17 Dec 2020 16:00 Levuka Fiji  0.4
17 Dec 2020 16:00 Vunisea Fiji  0.4
17 Dec 2020 16:00 Mburelevu Fiji  0.4
17 Dec 2020 16:00 Mokoisa Fiji  0.4
17 Dec 2020 16:00 Naikorokoro Fiji  0.4
17 Dec 2020 16:00 Namara Fiji  0.4
17 Dec 2020 16:00 Gasele Fiji  0.4
17 Dec 2020 16:00 Soso Fiji  0.4
17 Dec 2020 16:00 Kavala Fiji  0.4
17 Dec 2020 16:00 Kaduvu Fiji  0.4
17 Dec 2020 04:00 Naruwai Fiji  0.4
17 Dec 2020 04:00 Nabouwalu Fiji  0.4
17 Dec 2020 04:15 Natua Fiji  0.4
17 Dec 2020 04:15 Mbangata Fiji  0.4
17 Dec 2020 04:15 Savusavu Fiji  0.4
17 Dec 2020 04:15 Naindi Fiji  0.4
17 Dec 2020 04:15 Korosi Fiji  0.4
17 Dec 2020 04:00 Thavanga Fiji  0.4
17 Dec 2020 19:00 Nukuvou Fiji  0.4
17 Dec 2020 19:00 Nabouwalu Fiji  0.4
17 Dec 2020 19:00 Vabea Fiji  0.4
16 Dec 2020 07:00 Lao Fiji  0.4
16 Dec 2020 07:00 Nailou Fiji  0.4
16 Dec 2020 07:00 Nawi Fiji  0.4
16 Dec 2020 07:00 Vunikura Fiji  0.4
16 Dec 2020 07:00 Napuka Fiji  0.4
17 Dec 2020 18:45 Korovisilou Fiji  0.4
17 Dec 2020 08:45 Vunivatu Fiji  0.4
17 Dec 2020 08:45 Navukembuli Fiji  0.4
17 Dec 2020 04:45 Momi Fiji  0.4
17 Dec 2020 16:00 Korotasere Fiji  0.3
17 Dec 2020 16:00 Naweni Fiji  0.3
17 Dec 2020 16:00 Viani Fiji  0.3
17 Dec 2020 16:00 Ndrekeniwai Fiji  0.3
17 Dec 2020 16:00 Mbangasau Fiji  0.3
17 Dec 2020 04:45 Lomawal Fiji  0.3
17 Dec 2020 04:30 Ndaria Fiji  0.3
17 Dec 2020 04:30 Rave-rave Fiji  0.3
17 Dec 2020 04:45 Mbatiri Fiji  0.3
17 Dec 2020 04:15 Makongai Fiji  0.3
17 Dec 2020 19:00 Vione Fiji  0.3
17 Dec 2020 19:00 Dalice Fiji  0.3
17 Dec 2020 19:00 Nalotu Fiji  0.3
17 Dec 2020 04:30 Cuvu Fiji  0.3
17 Dec 2020 04:30 Sigatoka Fiji  0.3
17 Dec 2020 04:30 Laselase Fiji  0.3
17 Dec 2020 19:00 Nasau Fiji  0.3
17 Dec 2020 19:00 Talaulia Fiji  0.3
17 Dec 2020 04:15 Ndawara Fiji  0.3
17 Dec 2020 04:15 Waisa Fiji  0.3
17 Dec 2020 04:30 Vatukarasa Fiji  0.3
17 Dec 2020 04:30 Korolevu Fiji  0.3
17 Dec 2020 19:00 Bouwanga Fiji  0.3
17 Dec 2020 19:00 Taunovo Fiji  0.3
17 Dec 2020 18:45 Sawaieke Fiji  0.3
17 Dec 2020 18:45 Kalokolevu Fiji  0.3
17 Dec 2020 18:45 Suva Fiji  0.3
17 Dec 2020 18:45 Tamavua Fiji  0.3
17 Dec 2020 18:45 Lauthala Bay Fiji  0.3
17 Dec 2020 18:45 Laucala Fiji  0.3
16 Dec 2020 18:15 Nakarambo Fiji  0.3
17 Dec 2020 08:45 Naua Fiji  0.3
17 Dec 2020 08:45 Namukalau Fiji  0.3
18 Dec 2020 03:30 Andako Fiji  0.3
17 Dec 2020 18:45 Vandravandra Fiji  0.3
17 Dec 2020 19:00 Keteira Fiji  0.3
17 Dec 2020 13:30 Otumoetai New Zealand  0.3
17 Dec 2020 13:30 Mount Maunganui New Zealand  0.3
17 Dec 2020 13:30 Matapihi New Zealand  0.3
17 Dec 2020 13:30 Kairua New Zealand  0.3
17 Dec 2020 13:30 Papamoa New Zealand  0.3
16 Dec 2020 18:00 Malake Fiji  0.3
16 Dec 2020 18:00 Biagunu Fiji  0.3
17 Dec 2020 03:30 Namboutini Fiji  0.3
17 Dec 2020 04:15 Nakondu Fiji  0.3
17 Dec 2020 04:15 Nathamaki Fiji  0.3
17 Dec 2020 04:15 Nasau Fiji  0.3
17 Dec 2020 13:00 Maketu New Zealand  0.2
17 Dec 2020 13:00 Maniatutu New Zealand  0.2
17 Dec 2020 13:00 Pukehina New Zealand  0.2
17 Dec 2020 13:00 Ohinepanea New Zealand  0.2
17 Dec 2020 13:00 Otamarakau New Zealand  0.2
17 Dec 2020 13:00 Pikowai New Zealand  0.2
17 Dec 2020 06:00 Tairua New Zealand  0.2
17 Dec 2020 06:00 Pauanui New Zealand  0.2
17 Dec 2020 06:00 Opoutere New Zealand  0.2
17 Dec 2020 06:00 Whangamata New Zealand  0.2
16 Dec 2020 03:45 Te Puia New Zealand  0.2
16 Dec 2020 03:45 Te Puia Springs New Zealand  0.2
16 Dec 2020 03:45 Tokomaru Bay New Zealand  0.2
16 Dec 2020 03:45 Waipiro New Zealand  0.2
16 Dec 2020 03:45 Waipiro Bay New Zealand  0.2
16 Dec 2020 03:45 Whareponga New Zealand  0.2
16 Dec 2020 03:45 Tuparoa New Zealand  0.2
17 Dec 2020 06:00 Tawake Fiji  0.2
16 Dec 2020 19:30 Vangai Fiji  0.2
16 Dec 2020 20:00 Sumi Fiji  0.2
16 Dec 2020 20:00 Elsee Fiji  0.2
17 Dec 2020 04:00 Korovou Fiji  0.2
17 Dec 2020 04:00 Navakawau Fiji  0.2
17 Dec 2020 06:00 Nukusa Fiji  0.2
16 Dec 2020 19:00 Matata New Zealand  0.2
16 Dec 2020 19:00 Awakaponga New Zealand  0.2
16 Dec 2020 20:15 Nambouono Fiji  0.2
17 Dec 2020 13:15 Waihi Beach New Zealand  0.2
17 Dec 2020 13:15 Athenree New Zealand  0.2
17 Dec 2020 12:45 Thornton New Zealand  0.2
17 Dec 2020 12:45 Poroporo New Zealand  0.2
17 Dec 2020 12:45 Whakatane New Zealand  0.2
17 Dec 2020 13:00 Ohope Beach New Zealand  0.2
16 Dec 2020 15:45 Hicks Bay New Zealand  0.2
16 Dec 2020 15:45 Te Araroa New Zealand  0.2
16 Dec 2020 15:45 Rangitukia New Zealand  0.2
16 Dec 2020 15:45 Horoera New Zealand  0.2
16 Dec 2020 15:45 East Cape New Zealand  0.2
18 Dec 2020 04:00 Lakina Tuvalu  0.2
18 Dec 2020 04:00 Tonga Tuvalu  0.2
18 Dec 2020 04:15 Vaitupu Tuvalu  0.1
17 Dec 2020 12:45 Opotiki New Zealand  0.1
17 Dec 2020 12:45 Lower Waiawa New Zealand  0.1
17 Dec 2020 12:45 Torere New Zealand  0.1
17 Dec 2020 12:45 Houpoto New Zealand  0.1
16 Dec 2020 04:30 Waiotahi New Zealand  0.1
16 Dec 2020 04:15 Port Awanui New Zealand  0.1