Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga
14 Dec 2020 06 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, Tonga, Niue
Exposed population No people in Category 1 or higher
Maximum wind speed 94 km/h
Maximum storm surge 0.7 m (15 Dec 20:15 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 94 km/h 0.7 m 26 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 30 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 06:00 UTC
CategoryCountryPopulation 
Tropical StormFiji, Tonga, Niue30,239
+
Fiji6,955 
Tonga22,094 
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 06:00 133 -
- - - - - Fiji, 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 06:00 UTC
LevelCountryPopulation 
100-250 mmWallis and Futuna, Samoa, Tonga, Fiji, Niue476,601
+
Fiji439,440 
Wallis and Futuna12,963 
Samoa21,949 
Tonga1,059 
Niue1,190 
50-100 mmTuvalu, Tokelau, Fiji, Samoa, Wallis and Futuna, Tonga644,507
+
Tuvalu1,834 
Tokelau431 
Fiji458,675 
Wallis and Futuna2,598 
Samoa174,679 
Tonga6,290 

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 06:00 499 480 thousand
- - - - Tuvalu, Tokelau, Fiji, Wallis and Futuna, Samoa, Tonga, Niue




Impact estimation for the next 72h
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StormSurge

0.7 m

The maximum Storm surge height is  0.7m in Lautoka, Fiji. This height is estimated for 15 Dec 2020 20:15 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 06:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
15 Dec 2020 20:15 Lautoka Fiji  0.7
15 Dec 2020 20:15 Nailanga Fiji  0.7
15 Dec 2020 20:15 Sorokoba Fiji  0.7
15 Dec 2020 20:15 Ba Fiji  0.7
15 Dec 2020 20:15 Natunuka Fiji  0.6
15 Dec 2020 20:15 Tavua Fiji  0.6
15 Dec 2020 20:15 Namaka Fiji  0.6
15 Dec 2020 12:15 Koroinasolo Fiji  0.6
15 Dec 2020 12:15 Savu Sau Fiji  0.6
15 Dec 2020 12:15 Navinggiri Fiji  0.6
15 Dec 2020 12:15 Yangganga Fiji  0.6
15 Dec 2020 12:15 Nawailevu Fiji  0.6
15 Dec 2020 20:45 Natua Fiji  0.4
15 Dec 2020 20:45 Mbangata Fiji  0.4
15 Dec 2020 20:45 Savusavu Fiji  0.4
15 Dec 2020 20:45 Naindi Fiji  0.4
15 Dec 2020 20:45 Korosi Fiji  0.4
15 Dec 2020 20:15 Soso Fiji  0.4
15 Dec 2020 20:15 Somosomo Fiji  0.4
15 Dec 2020 20:15 Nalauwaki Fiji  0.4
15 Dec 2020 20:15 Solevu Fiji  0.4
15 Dec 2020 20:15 Tavua Fiji  0.4
14 Dec 2020 13:00 Korovou Fiji  0.4
14 Dec 2020 13:00 Lodoni Fiji  0.4
14 Dec 2020 13:00 Lawaki Fiji  0.4
14 Dec 2020 13:00 Naingani Fiji  0.4
14 Dec 2020 13:00 Navuti Fiji  0.4
14 Dec 2020 13:00 Nasaga Fiji  0.4
14 Dec 2020 13:00 Rukuruku Fiji  0.4
14 Dec 2020 13:00 Lovoni Fiji  0.4
15 Dec 2020 20:15 Matayalevu Fiji  0.4
15 Dec 2020 01:15 Rabulu Fiji  0.4
15 Dec 2020 01:15 Togowere Fiji  0.4
14 Dec 2020 13:00 Ucunivanua Fiji  0.4
15 Dec 2020 20:15 Matacawalevu Fiji  0.3
15 Dec 2020 20:15 Sisili Fiji  0.3
14 Dec 2020 21:00 Lao Fiji  0.3
14 Dec 2020 21:00 Nailou Fiji  0.3
14 Dec 2020 21:00 Nawi Fiji  0.3
14 Dec 2020 21:00 Vunikura Fiji  0.3
14 Dec 2020 21:00 Napuka Fiji  0.3
14 Dec 2020 23:00 Korotasere Fiji  0.3
14 Dec 2020 23:00 Naweni Fiji  0.3
14 Dec 2020 23:00 Nakarambo Fiji  0.3
14 Dec 2020 23:00 Viani Fiji  0.3
14 Dec 2020 13:00 Nauouo Fiji  0.3
14 Dec 2020 13:00 Levuka Fiji  0.3
16 Dec 2020 17:45 Ndrekeniwai Fiji  0.3
16 Dec 2020 17:45 Mbangasau Fiji  0.3
15 Dec 2020 06:00 Otumoetai New Zealand  0.3
15 Dec 2020 06:00 Mount Maunganui New Zealand  0.3
15 Dec 2020 06:00 Matapihi New Zealand  0.3
15 Dec 2020 06:00 Kairua New Zealand  0.3
15 Dec 2020 06:00 Papamoa New Zealand  0.3
14 Dec 2020 17:30 Navindamu Fiji  0.3
14 Dec 2020 17:30 Nagumu Fiji  0.3
15 Dec 2020 12:15 Nasarowangga Fiji  0.3
15 Dec 2020 01:00 Rakiraki Fiji  0.3
15 Dec 2020 01:00 Vaileka Fiji  0.3
15 Dec 2020 01:00 Nanukuloa Fiji  0.3
14 Dec 2020 17:45 Nanduri Fiji  0.3
14 Dec 2020 17:45 Vatutandova Fiji  0.3
14 Dec 2020 17:45 Nasea Fiji  0.3
14 Dec 2020 13:00 Kasavu Fiji  0.3
14 Dec 2020 13:00 Naimasimasi Fiji  0.3
17 Dec 2020 04:30 Nasau Fiji  0.3
17 Dec 2020 04:30 Nayavutoka Fiji  0.3
14 Dec 2020 17:15 Nacula Fiji  0.3
14 Dec 2020 17:15 Navotua Fiji  0.3
14 Dec 2020 17:15 Tamusua Fiji  0.3
14 Dec 2020 17:15 Teci Fiji  0.3
14 Dec 2020 17:15 Mbukama Fiji  0.3
14 Dec 2020 17:15 Yasawairara Fiji  0.3
17 Dec 2020 04:30 Nadi Fiji  0.3
15 Dec 2020 10:15 Nabouwalu Fiji  0.3
15 Dec 2020 10:15 Thavanga Fiji  0.3
15 Dec 2020 10:15 Ndaria Fiji  0.3
15 Dec 2020 10:15 Rave-rave Fiji  0.3
16 Dec 2020 18:15 Malake Fiji  0.3
16 Dec 2020 18:15 Biagunu Fiji  0.3
17 Dec 2020 04:30 Ndawara Fiji  0.3
17 Dec 2020 04:30 Waisa Fiji  0.3
17 Dec 2020 04:30 Momi Fiji  0.3
17 Dec 2020 04:00 Nausori Fiji  0.2
17 Dec 2020 04:00 Cautata Fiji  0.2
17 Dec 2020 04:00 Dromuna Fiji  0.2
14 Dec 2020 18:30 Waihi Beach New Zealand  0.2
14 Dec 2020 18:30 Athenree New Zealand  0.2
16 Dec 2020 10:30 Gasele Fiji  0.2
16 Dec 2020 10:30 Soso Fiji  0.2
16 Dec 2020 10:30 Kavala Fiji  0.2
16 Dec 2020 10:30 Kaduvu Fiji  0.2
16 Dec 2020 10:30 Nukuvou Fiji  0.2
16 Dec 2020 10:30 Nabouwalu Fiji  0.2
16 Dec 2020 10:30 Vabea Fiji  0.2
14 Dec 2020 18:15 Maketu New Zealand  0.2
14 Dec 2020 18:15 Maniatutu New Zealand  0.2
14 Dec 2020 18:15 Pukehina New Zealand  0.2
14 Dec 2020 18:15 Ohinepanea New Zealand  0.2
14 Dec 2020 18:15 Otamarakau New Zealand  0.2
14 Dec 2020 18:15 Pikowai New Zealand  0.2
15 Dec 2020 12:30 Ndalomo Fiji  0.2
15 Dec 2020 03:45 Namboutini Fiji  0.2
14 Dec 2020 17:15 Ndenimanu Fiji  0.2
14 Dec 2020 17:00 Vunivatu Fiji  0.2
14 Dec 2020 17:00 Navukembuli Fiji  0.2
14 Dec 2020 17:00 Naua Fiji  0.2
14 Dec 2020 17:00 Namukalau Fiji  0.2
17 Dec 2020 04:45 Lomawal Fiji  0.2
17 Dec 2020 04:45 Mbatiri Fiji  0.2
17 Dec 2020 04:15 Lokia Fiji  0.2
17 Dec 2020 04:15 Nasilai Fiji  0.2
16 Dec 2020 20:00 Elsee Fiji  0.2
16 Dec 2020 20:00 Sumi Fiji  0.2
16 Dec 2020 20:15 Tawake Fiji  0.2
15 Dec 2020 05:45 Matata New Zealand  0.2
15 Dec 2020 05:45 Awakaponga New Zealand  0.2
15 Dec 2020 05:45 Thornton New Zealand  0.2
15 Dec 2020 05:45 Poroporo New Zealand  0.2
15 Dec 2020 05:45 Whakatane New Zealand  0.2
15 Dec 2020 10:00 Vunisea Fiji  0.2
15 Dec 2020 10:00 Mburelevu Fiji  0.2
15 Dec 2020 10:00 Mokoisa Fiji  0.2
15 Dec 2020 10:00 Naikorokoro Fiji  0.2
15 Dec 2020 10:00 Namara Fiji  0.2
17 Dec 2020 04:30 Cuvu Fiji  0.2
16 Dec 2020 04:15 Opoutere New Zealand  0.2
16 Dec 2020 04:15 Whangamata New Zealand  0.2
17 Dec 2020 04:30 Sigatoka Fiji  0.2
17 Dec 2020 04:30 Laselase Fiji  0.2
15 Dec 2020 12:15 Naruwai Fiji  0.2
16 Dec 2020 19:00 Nasau Fiji  0.2
16 Dec 2020 19:00 Talaulia Fiji  0.2
16 Dec 2020 19:00 Nalotu Fiji  0.2
16 Dec 2020 19:00 Galoa Fiji  0.2
16 Dec 2020 19:00 Yanutha Fiji  0.2
16 Dec 2020 19:00 Matavuralevu Fiji  0.2
16 Dec 2020 19:00 Pacific Harbour Fiji  0.2
16 Dec 2020 19:00 Waisomo Fiji  0.2
16 Dec 2020 19:00 Dakuimbeqa Fiji  0.2
16 Dec 2020 19:00 Lalati Fiji  0.2
16 Dec 2020 19:00 Navua Fiji  0.2
16 Dec 2020 19:00 Naitionitoni Fiji  0.2
16 Dec 2020 19:00 Mau Fiji  0.2
16 Dec 2020 20:00 Nukusa Fiji  0.2
17 Dec 2020 04:30 Vatukarasa Fiji  0.2
16 Dec 2020 20:00 Nambouono Fiji  0.2
17 Dec 2020 04:30 Korolevu Fiji  0.2
16 Dec 2020 19:30 Vangai Fiji  0.2
17 Dec 2020 04:15 Nakondu Fiji  0.2
17 Dec 2020 04:15 Nathamaki Fiji  0.2
17 Dec 2020 04:15 Nasau Fiji  0.2
17 Dec 2020 04:30 Taunovo Fiji  0.2
17 Dec 2020 04:30 Bouwanga Fiji  0.2
16 Dec 2020 18:45 Korovou Fiji  0.2
14 Dec 2020 20:45 Tairua New Zealand  0.2
14 Dec 2020 20:45 Pauanui New Zealand  0.2
16 Dec 2020 18:45 Navakawau Fiji  0.2
16 Dec 2020 18:45 Vione Fiji  0.2
16 Dec 2020 18:45 Dalice Fiji  0.2
17 Dec 2020 04:30 Korovisilou Fiji  0.2
16 Dec 2020 18:30 Makongai Fiji  0.2
16 Dec 2020 19:45 Tonga Tuvalu  0.2
16 Dec 2020 19:45 Lakina Tuvalu  0.2
16 Dec 2020 20:00 Vaitupu Tuvalu  0.2
16 Dec 2020 18:45 Sawaieke Fiji  0.2
16 Dec 2020 18:45 Vandravandra Fiji  0.2
15 Dec 2020 17:15 Te Puia New Zealand  0.2
15 Dec 2020 17:15 Te Puia Springs New Zealand  0.2
15 Dec 2020 17:15 Tokomaru Bay New Zealand  0.2
15 Dec 2020 17:15 Waipiro New Zealand  0.2
15 Dec 2020 17:15 Waipiro Bay New Zealand  0.2
15 Dec 2020 17:15 Whareponga New Zealand  0.2
15 Dec 2020 17:15 Tuparoa New Zealand  0.2
17 Dec 2020 04:15 Kalokolevu Fiji  0.2
16 Dec 2020 19:00 Keteira Fiji  0.2
17 Dec 2020 04:15 Suva Fiji  0.2
17 Dec 2020 04:15 Tamavua Fiji  0.2
17 Dec 2020 04:15 Lauthala Bay Fiji  0.2
17 Dec 2020 04:15 Laucala Fiji  0.2
17 Dec 2020 04:00 Andako Fiji  0.1
15 Dec 2020 18:45 Port Awanui New Zealand  0.1
15 Dec 2020 18:45 Rangitukia New Zealand  0.1
16 Dec 2020 04:30 Opotiki New Zealand  0.1
16 Dec 2020 04:30 Lower Waiawa New Zealand  0.1
16 Dec 2020 04:30 Torere New Zealand  0.1
16 Dec 2020 04:45 Waiotahi New Zealand  0.1
14 Dec 2020 20:30 Ohope Beach New Zealand  0.1
16 Dec 2020 04:30 Houpoto New Zealand  0.1