Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga
15 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 Fiji, Tonga, Niue
Exposed population 20 thousand in Category 1 or higher
Maximum wind speed 97 km/h
Maximum storm surge 1.4 m (17 Dec 10:30 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 97 km/h 1.4 m 27 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 230 thousand can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 15 Dec 2020 00:00 UTC
CategoryCountryPopulation 
CAT. 2Fiji4,147 
CAT. 1Fiji17,914 
Tropical StormFiji, Tonga, Niue229,726
+
Fiji207,917 
Tonga20,619 
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 79 -
- - - - - Tonga
GREEN 4 14 Dec 2020 12:00 83 -
- - - - - Tonga
GREEN 5 15 Dec 2020 00:00 187 20 thousand
- - - Fiji, Tonga, Niue
Download:





Impact estimation for the next 72h
TOP

Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 15 Dec 2020 00:00 UTC
LevelCountryPopulation 
250-500 mmFiji66,535 
100-250 mmSamoa, American Samoa, Wallis and Futuna, Tonga, Fiji, Niue917,187
+
Fiji726,046 
Wallis and Futuna2,598 
Samoa132,650 
American Samoa53,380 
Tonga1,323 
Niue1,190 
50-100 mmFiji, Wallis and Futuna, Samoa, American Samoa, Tonga201,874
+
Fiji108,959 
Wallis and Futuna12,963 
Samoa63,288 
American Samoa1,120 
Tonga15,544 

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 22 10 thousand - - - - - - Tonga
Blue 4 14 Dec 2020 12:00 23 20 thousand - - - - - - Tonga
Blue 5 15 Dec 2020 00:00 454 980 thousand
- - - Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga, Niue




Impact estimation for the next 72h
TOP

StormSurge

1.4 m

The maximum Storm surge height is  1.4m in Koroinasolo, Fiji. This height is estimated for 17 Dec 2020 10:30 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 15 Dec 2020 00:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
17 Dec 2020 10:30 Koroinasolo Fiji  1.4
17 Dec 2020 10:30 Savu Sau Fiji  1.4
17 Dec 2020 10:30 Navinggiri Fiji  1.4
17 Dec 2020 10:30 Yangganga Fiji  1.4
17 Dec 2020 10:30 Nawailevu Fiji  1.4
17 Dec 2020 11:00 Navindamu Fiji  1.2
17 Dec 2020 11:00 Nagumu Fiji  1.2
17 Dec 2020 10:15 Nasarowangga Fiji  1.1
17 Dec 2020 10:45 Ndalomo Fiji  0.9
17 Dec 2020 10:00 Ndenimanu Fiji  0.8
17 Dec 2020 16:00 Dalice Fiji  0.7
17 Dec 2020 12:15 Nabouwalu Fiji  0.7
17 Dec 2020 12:15 Thavanga Fiji  0.7
17 Dec 2020 12:15 Rave-rave Fiji  0.7
17 Dec 2020 12:15 Ndaria Fiji  0.7
17 Dec 2020 11:00 Naruwai Fiji  0.7
17 Dec 2020 15:00 Nakondu Fiji  0.7
17 Dec 2020 15:00 Nasau Fiji  0.7
17 Dec 2020 15:00 Nathamaki Fiji  0.6
17 Dec 2020 14:00 Makongai Fiji  0.6
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
17 Dec 2020 12:15 Waisa Fiji  0.6
17 Dec 2020 16:00 Vione Fiji  0.6
17 Dec 2020 21:00 Keteira Fiji  0.6
17 Dec 2020 17:00 Vandravandra Fiji  0.6
17 Dec 2020 12:15 Ndawara Fiji  0.6
17 Dec 2020 10:45 Nanduri Fiji  0.6
17 Dec 2020 16:15 Sawaieke Fiji  0.5
17 Dec 2020 12:00 Vatutandova Fiji  0.5
17 Dec 2020 12:00 Nasea Fiji  0.5
17 Dec 2020 13:00 Korosi Fiji  0.5
17 Dec 2020 13:00 Korotasere Fiji  0.5
17 Dec 2020 13:00 Naweni Fiji  0.5
17 Dec 2020 13:00 Viani Fiji  0.5
17 Dec 2020 13:00 Ndrekeniwai Fiji  0.5
17 Dec 2020 13:00 Mbangasau Fiji  0.5
15 Dec 2020 08:15 Natunuka Fiji  0.5
15 Dec 2020 08:15 Tavua Fiji  0.5
17 Dec 2020 06:00 Mbukama Fiji  0.5
17 Dec 2020 06:00 Yasawairara Fiji  0.5
15 Dec 2020 08:15 Namaka Fiji  0.5
15 Dec 2020 00:45 Rabulu Fiji  0.5
15 Dec 2020 00:45 Togowere Fiji  0.5
17 Dec 2020 14:00 Nauouo Fiji  0.4
17 Dec 2020 14:00 Levuka Fiji  0.4
17 Dec 2020 13:00 Savusavu Fiji  0.4
17 Dec 2020 12:30 Natua Fiji  0.4
17 Dec 2020 06:15 Teci Fiji  0.4
15 Dec 2020 08:15 Solevu Fiji  0.4
17 Dec 2020 13:00 Naingani Fiji  0.4
17 Dec 2020 13:00 Naindi Fiji  0.4
17 Dec 2020 13:00 Korovou Fiji  0.4
17 Dec 2020 13:00 Lodoni Fiji  0.4
17 Dec 2020 13:00 Lawaki Fiji  0.4
17 Dec 2020 13:00 Navuti Fiji  0.4
17 Dec 2020 13:00 Nasaga Fiji  0.4
17 Dec 2020 13:00 Rukuruku Fiji  0.4
17 Dec 2020 13:00 Lovoni Fiji  0.4
17 Dec 2020 06:15 Nacula Fiji  0.4
17 Dec 2020 06:15 Navotua Fiji  0.4
17 Dec 2020 06:15 Tamusua Fiji  0.4
17 Dec 2020 13:45 Mbangata Fiji  0.4
17 Dec 2020 10:15 Nanukuloa Fiji  0.4
17 Dec 2020 10:15 Nasau Fiji  0.4
17 Dec 2020 10:15 Nayavutoka Fiji  0.4
17 Dec 2020 02:15 Soso Fiji  0.4
17 Dec 2020 02:15 Somosomo Fiji  0.4
17 Dec 2020 02:15 Matayalevu Fiji  0.4
17 Dec 2020 02:15 Matacawalevu Fiji  0.4
17 Dec 2020 02:15 Sisili Fiji  0.4
17 Dec 2020 12:45 Nakarambo Fiji  0.4
17 Dec 2020 12:45 Kasavu Fiji  0.4
17 Dec 2020 12:45 Naimasimasi Fiji  0.4
17 Dec 2020 12:45 Ucunivanua Fiji  0.4
15 Dec 2020 08:15 Nalauwaki Fiji  0.4
17 Dec 2020 09:30 Vunivatu Fiji  0.4
17 Dec 2020 09:30 Navukembuli Fiji  0.4
15 Dec 2020 08:15 Tavua Fiji  0.4
17 Dec 2020 13:15 Nausori Fiji  0.4
17 Dec 2020 13:15 Cautata Fiji  0.4
17 Dec 2020 13:15 Dromuna Fiji  0.4
17 Dec 2020 11:15 Rakiraki Fiji  0.3
17 Dec 2020 12:30 Lokia Fiji  0.3
17 Dec 2020 12:30 Nasilai Fiji  0.3
17 Dec 2020 11:15 Vaileka Fiji  0.3
17 Dec 2020 15:30 Naua Fiji  0.3
17 Dec 2020 15:30 Namukalau Fiji  0.3
17 Dec 2020 12:45 Malake Fiji  0.3
17 Dec 2020 12:45 Biagunu Fiji  0.3
17 Dec 2020 16:15 Navakawau Fiji  0.3
17 Dec 2020 18:15 Lao Fiji  0.3
17 Dec 2020 18:15 Nailou Fiji  0.3
17 Dec 2020 18:15 Nawi Fiji  0.3
17 Dec 2020 18:15 Vunikura Fiji  0.3
17 Dec 2020 18:15 Napuka Fiji  0.3
17 Dec 2020 17:15 Namboutini Fiji  0.3
17 Dec 2020 16:15 Korovou Fiji  0.3
18 Dec 2020 00:00 Andako Fiji  0.3
17 Dec 2020 18:30 Tawake Fiji  0.3
17 Dec 2020 16:00 Vangai Fiji  0.3
17 Dec 2020 17:00 Vunisea Fiji  0.2
17 Dec 2020 17:00 Mburelevu Fiji  0.2
17 Dec 2020 17:00 Mokoisa Fiji  0.2
17 Dec 2020 17:00 Naikorokoro Fiji  0.2
17 Dec 2020 17:00 Namara Fiji  0.2
17 Dec 2020 17:00 Gasele Fiji  0.2
17 Dec 2020 17:00 Soso Fiji  0.2
17 Dec 2020 17:00 Kavala Fiji  0.2
17 Dec 2020 17:00 Kaduvu Fiji  0.2
16 Dec 2020 16:15 Nadi Fiji  0.2
16 Dec 2020 16:30 Nukuvou Fiji  0.2
16 Dec 2020 16:30 Nabouwalu Fiji  0.2
16 Dec 2020 16:30 Vabea Fiji  0.2
17 Dec 2020 18:30 Galoa Fiji  0.2
17 Dec 2020 18:30 Yanutha Fiji  0.2
17 Dec 2020 18:30 Matavuralevu Fiji  0.2
17 Dec 2020 18:30 Pacific Harbour Fiji  0.2
17 Dec 2020 18:30 Waisomo Fiji  0.2
17 Dec 2020 18:30 Dakuimbeqa Fiji  0.2
17 Dec 2020 18:30 Lalati Fiji  0.2
17 Dec 2020 18:30 Navua Fiji  0.2
17 Dec 2020 18:30 Naitionitoni Fiji  0.2
17 Dec 2020 18:30 Mau Fiji  0.2
17 Dec 2020 18:30 Nukusa Fiji  0.2
16 Dec 2020 03:15 Te Puia New Zealand  0.2
16 Dec 2020 03:15 Te Puia Springs New Zealand  0.2
16 Dec 2020 03:15 Tokomaru Bay New Zealand  0.2
16 Dec 2020 03:15 Waipiro New Zealand  0.2
16 Dec 2020 03:15 Waipiro Bay New Zealand  0.2
16 Dec 2020 03:15 Whareponga New Zealand  0.2
16 Dec 2020 03:15 Tuparoa New Zealand  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
15 Dec 2020 09:30 Maketu New Zealand  0.2
15 Dec 2020 09:30 Maniatutu New Zealand  0.2
15 Dec 2020 09:30 Pukehina New Zealand  0.2
15 Dec 2020 09:30 Ohinepanea New Zealand  0.2
15 Dec 2020 09:30 Otamarakau New Zealand  0.2
15 Dec 2020 09:30 Pikowai New Zealand  0.2
17 Dec 2020 11:00 Otumoetai New Zealand  0.2
17 Dec 2020 11:00 Mount Maunganui New Zealand  0.2
17 Dec 2020 11:00 Matapihi New Zealand  0.2
17 Dec 2020 11:00 Kairua New Zealand  0.2
17 Dec 2020 11:00 Papamoa New Zealand  0.2
15 Dec 2020 15:00 Opoutere New Zealand  0.2
15 Dec 2020 15:00 Whangamata New Zealand  0.2
17 Dec 2020 16:30 Laucala Fiji  0.2
17 Dec 2020 17:45 Nambouono Fiji  0.2
17 Dec 2020 18:15 Suva Fiji  0.2
17 Dec 2020 18:15 Tamavua Fiji  0.2
17 Dec 2020 18:15 Lauthala Bay Fiji  0.2
16 Dec 2020 16:30 Momi Fiji  0.2
17 Dec 2020 16:30 Kalokolevu Fiji  0.2
17 Dec 2020 18:15 Korovisilou Fiji  0.2
16 Dec 2020 08:00 Sumi Fiji  0.2
16 Dec 2020 08:00 Elsee Fiji  0.2
17 Dec 2020 16:45 Lomawal Fiji  0.2
17 Dec 2020 17:15 Korolevu Fiji  0.2
17 Dec 2020 02:15 Mbatiri Fiji  0.2
17 Dec 2020 10:45 Waihi Beach New Zealand  0.2
17 Dec 2020 10:45 Athenree New Zealand  0.2
17 Dec 2020 17:15 Taunovo Fiji  0.2
17 Dec 2020 17:15 Vatukarasa Fiji  0.2
17 Dec 2020 17:15 Bouwanga Fiji  0.2
15 Dec 2020 07:15 Matata New Zealand  0.2
15 Dec 2020 07:15 Awakaponga New Zealand  0.2
15 Dec 2020 07:15 Thornton New Zealand  0.2
15 Dec 2020 07:15 Poroporo New Zealand  0.2
15 Dec 2020 07:15 Whakatane New Zealand  0.2
17 Dec 2020 17:15 Cuvu Fiji  0.2
17 Dec 2020 17:15 Sigatoka Fiji  0.2
17 Dec 2020 17:15 Laselase Fiji  0.2
16 Dec 2020 03:30 Port Awanui New Zealand  0.2
16 Dec 2020 03:30 Rangitukia New Zealand  0.2
17 Dec 2020 16:45 Lakina Tuvalu  0.1
16 Dec 2020 08:45 Tonga Tuvalu  0.1
16 Dec 2020 08:45 Vaitupu Tuvalu  0.1
16 Dec 2020 18:00 Tairua New Zealand  0.1
16 Dec 2020 18:00 Pauanui New Zealand  0.1
16 Dec 2020 02:45 Horoera New Zealand  0.1
16 Dec 2020 02:45 East Cape New Zealand  0.1
15 Dec 2020 07:15 Ohope Beach New Zealand  0.1
15 Dec 2020 07:15 Waiotahi New Zealand  0.1