Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga
15 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 GFS
Exposed countries Fiji, Niue
Exposed population 260 thousand in Category 1 or higher
Maximum wind speed 97 km/h
Maximum storm surge 1.5 m (17 Dec 14:15 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 97 km/h 1.5 m 27 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 280 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 12:00 UTC
CategoryCountryPopulation 
CAT. 3Fiji4,012 
CAT. 2Fiji104,073 
CAT. 1Fiji147,189 
Tropical StormFiji, Niue284,032
+
Fiji282,842 
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 12:00 198 260 thousand
- - Fiji, Niue
Download:





Impact estimation for the next 72h
TOP

Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 15 Dec 2020 12:00 UTC
LevelCountryPopulation 
250-500 mmFiji668,607 
100-250 mmSamoa, American Samoa, Tonga, Fiji, Niue370,119
+
Fiji119,275 
Samoa196,628 
American Samoa53,380 
Tonga265 
Niue571 
50-100 mmFiji, Wallis and Futuna, American Samoa, Tonga, Niue135,393
+
Fiji114,378 
Wallis and Futuna15,561 
American Samoa855 
Tonga3,980 
Niue619 

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 12:00 687 1 million
- - - Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga, Niue




Impact estimation for the next 72h
TOP

StormSurge

1.5 m

The maximum Storm surge height is  1.5m in Lautoka, Fiji. This height is estimated for 17 Dec 2020 14:15 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 15 Dec 2020 12:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
17 Dec 2020 14:15 Lautoka Fiji  1.5
17 Dec 2020 14:15 Nailanga Fiji  1.5
17 Dec 2020 14:15 Sorokoba Fiji  1.5
17 Dec 2020 14:15 Ba Fiji  1.5
17 Dec 2020 14:45 Natunuka Fiji  1.3
17 Dec 2020 14:45 Tavua Fiji  1.3
17 Dec 2020 10:15 Soso Fiji  1.3
17 Dec 2020 10:15 Somosomo Fiji  1.3
17 Dec 2020 10:15 Matayalevu Fiji  1.3
17 Dec 2020 10:15 Matacawalevu Fiji  1.3
17 Dec 2020 10:15 Sisili Fiji  1.3
17 Dec 2020 11:15 Nacula Fiji  1.2
17 Dec 2020 11:15 Navotua Fiji  1.2
17 Dec 2020 11:15 Tamusua Fiji  1.2
17 Dec 2020 11:15 Teci Fiji  1.2
17 Dec 2020 11:15 Mbukama Fiji  1.2
17 Dec 2020 11:15 Yasawairara Fiji  1.2
17 Dec 2020 16:00 Nalauwaki Fiji  1.1
17 Dec 2020 11:15 Tavua Fiji  1.0
17 Dec 2020 11:15 Solevu Fiji  1.0
17 Dec 2020 11:30 Namaka Fiji  0.9
17 Dec 2020 13:15 Rabulu Fiji  0.8
17 Dec 2020 13:15 Togowere Fiji  0.8
17 Dec 2020 18:15 Rakiraki Fiji  0.7
17 Dec 2020 18:15 Vaileka Fiji  0.7
17 Dec 2020 18:15 Nanukuloa Fiji  0.7
17 Dec 2020 19:00 Nasau Fiji  0.6
17 Dec 2020 18:30 Koroinasolo Fiji  0.6
17 Dec 2020 18:30 Savu Sau Fiji  0.6
17 Dec 2020 18:30 Navinggiri Fiji  0.6
17 Dec 2020 18:30 Yangganga Fiji  0.6
17 Dec 2020 18:30 Nawailevu Fiji  0.6
18 Dec 2020 04:00 Gasele Fiji  0.5
18 Dec 2020 04:00 Soso Fiji  0.5
18 Dec 2020 04:00 Kavala Fiji  0.5
18 Dec 2020 04:00 Kaduvu Fiji  0.5
18 Dec 2020 04:00 Nukuvou Fiji  0.5
18 Dec 2020 04:00 Nabouwalu Fiji  0.5
18 Dec 2020 04:00 Vabea Fiji  0.5
18 Dec 2020 04:00 Nasau Fiji  0.5
18 Dec 2020 04:00 Talaulia Fiji  0.5
18 Dec 2020 04:00 Nalotu Fiji  0.5
18 Dec 2020 04:00 Vunisea Fiji  0.5
18 Dec 2020 04:00 Mburelevu Fiji  0.5
18 Dec 2020 04:00 Mokoisa Fiji  0.5
18 Dec 2020 04:00 Naikorokoro Fiji  0.5
18 Dec 2020 04:00 Namara Fiji  0.5
17 Dec 2020 18:15 Ndalomo Fiji  0.5
17 Dec 2020 18:15 Nasarowangga Fiji  0.5
17 Dec 2020 10:15 Nayavutoka Fiji  0.5
17 Dec 2020 19:15 Kasavu Fiji  0.4
17 Dec 2020 19:15 Nausori Fiji  0.4
17 Dec 2020 19:15 Korovou Fiji  0.4
17 Dec 2020 19:15 Lokia Fiji  0.4
17 Dec 2020 19:15 Naimasimasi Fiji  0.4
17 Dec 2020 19:15 Ucunivanua Fiji  0.4
17 Dec 2020 19:15 Cautata Fiji  0.4
17 Dec 2020 19:15 Nasilai Fiji  0.4
17 Dec 2020 19:15 Dromuna Fiji  0.4
17 Dec 2020 18:45 Navindamu Fiji  0.4
17 Dec 2020 18:45 Nagumu Fiji  0.4
17 Dec 2020 18:45 Lawaki Fiji  0.4
17 Dec 2020 18:45 Ndenimanu Fiji  0.4
17 Dec 2020 18:45 Lodoni Fiji  0.4
17 Dec 2020 18:45 Naingani Fiji  0.4
17 Dec 2020 19:00 Nadi Fiji  0.4
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
16 Dec 2020 08:45 Lao Fiji  0.4
16 Dec 2020 08:45 Nailou Fiji  0.4
16 Dec 2020 08:45 Nawi Fiji  0.4
16 Dec 2020 08:45 Vunikura Fiji  0.4
16 Dec 2020 08:45 Napuka Fiji  0.4
17 Dec 2020 03:15 Navuti Fiji  0.4
17 Dec 2020 03:15 Nasaga Fiji  0.4
17 Dec 2020 03:15 Rukuruku Fiji  0.4
17 Dec 2020 03:15 Lovoni Fiji  0.4
17 Dec 2020 17:45 Nanduri Fiji  0.4
17 Dec 2020 17:45 Vatutandova Fiji  0.4
17 Dec 2020 17:45 Nasea Fiji  0.4
17 Dec 2020 19:15 Momi Fiji  0.4
17 Dec 2020 19:00 Nauouo Fiji  0.4
17 Dec 2020 19:00 Levuka Fiji  0.4
17 Dec 2020 19:45 Korotasere Fiji  0.4
17 Dec 2020 19:45 Naweni Fiji  0.4
17 Dec 2020 19:45 Viani Fiji  0.4
17 Dec 2020 19:45 Ndrekeniwai Fiji  0.4
17 Dec 2020 19:45 Mbangasau Fiji  0.4
17 Dec 2020 18:45 Lomawal Fiji  0.3
17 Dec 2020 19:30 Mbatiri Fiji  0.3
17 Dec 2020 19:30 Cuvu Fiji  0.3
17 Dec 2020 19:30 Sigatoka Fiji  0.3
17 Dec 2020 19:30 Laselase Fiji  0.3
17 Dec 2020 19:30 Vatukarasa Fiji  0.3
17 Dec 2020 19:30 Korolevu Fiji  0.3
18 Dec 2020 04:00 Galoa Fiji  0.3
18 Dec 2020 04:00 Yanutha Fiji  0.3
18 Dec 2020 04:00 Matavuralevu Fiji  0.3
18 Dec 2020 04:00 Pacific Harbour Fiji  0.3
18 Dec 2020 04:00 Waisomo Fiji  0.3
18 Dec 2020 04:00 Dakuimbeqa Fiji  0.3
18 Dec 2020 04:00 Lalati Fiji  0.3
18 Dec 2020 04:00 Navua Fiji  0.3
18 Dec 2020 04:00 Naitionitoni Fiji  0.3
18 Dec 2020 04:00 Mau Fiji  0.3
17 Dec 2020 19:30 Bouwanga Fiji  0.3
17 Dec 2020 19:30 Taunovo Fiji  0.3
17 Dec 2020 19:15 Korovisilou Fiji  0.3
17 Dec 2020 19:00 Nabouwalu Fiji  0.3
17 Dec 2020 19:00 Naruwai Fiji  0.3
17 Dec 2020 19:00 Thavanga 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 19:45 Nakarambo Fiji  0.3
18 Dec 2020 03:45 Laucala Fiji  0.3
18 Dec 2020 03:45 Ndaria Fiji  0.3
18 Dec 2020 03:45 Rave-rave Fiji  0.3
17 Dec 2020 18:45 Makongai Fiji  0.3
15 Dec 2020 20:45 Ndawara Fiji  0.3
15 Dec 2020 20:45 Waisa Fiji  0.3
17 Dec 2020 18:30 Vunivatu Fiji  0.3
17 Dec 2020 18:30 Navukembuli Fiji  0.3
17 Dec 2020 18:30 Naua Fiji  0.3
17 Dec 2020 18:30 Namukalau Fiji  0.3
17 Dec 2020 13:00 Maketu New Zealand  0.3
17 Dec 2020 13:00 Maniatutu New Zealand  0.3
17 Dec 2020 13:00 Pukehina New Zealand  0.3
17 Dec 2020 13:00 Ohinepanea New Zealand  0.3
17 Dec 2020 13:00 Otamarakau New Zealand  0.3
17 Dec 2020 13:00 Pikowai New Zealand  0.3
18 Dec 2020 03:30 Sawaieke Fiji  0.3
18 Dec 2020 03:30 Vione Fiji  0.3
18 Dec 2020 03:30 Dalice Fiji  0.3
18 Dec 2020 02:30 Malake Fiji  0.3
18 Dec 2020 02:30 Biagunu Fiji  0.3
18 Dec 2020 03:00 Namboutini Fiji  0.3
16 Dec 2020 04:30 Otumoetai New Zealand  0.3
16 Dec 2020 04:30 Mount Maunganui New Zealand  0.3
16 Dec 2020 04:30 Matapihi New Zealand  0.3
16 Dec 2020 04:30 Kairua New Zealand  0.3
16 Dec 2020 04:30 Papamoa New Zealand  0.3
18 Dec 2020 03:45 Vandravandra Fiji  0.2
16 Dec 2020 19:30 Opoutere New Zealand  0.2
16 Dec 2020 19:30 Whangamata New Zealand  0.2
16 Dec 2020 07:00 Vangai Fiji  0.2
18 Dec 2020 03:45 Andako Fiji  0.2
16 Dec 2020 02:30 Te Puia New Zealand  0.2
16 Dec 2020 02:30 Te Puia Springs New Zealand  0.2
16 Dec 2020 02:30 Tokomaru Bay New Zealand  0.2
16 Dec 2020 02:30 Waipiro New Zealand  0.2
16 Dec 2020 02:30 Waipiro Bay New Zealand  0.2
16 Dec 2020 02:30 Whareponga New Zealand  0.2
16 Dec 2020 02:30 Tuparoa New Zealand  0.2
17 Dec 2020 18:45 Nakondu Fiji  0.2
17 Dec 2020 18:45 Nasau Fiji  0.2
17 Dec 2020 18:45 Nathamaki Fiji  0.2
18 Dec 2020 03:45 Keteira Fiji  0.2
18 Dec 2020 03:00 Tawake Fiji  0.2
16 Dec 2020 20:00 Sumi Fiji  0.2
16 Dec 2020 20:00 Elsee Fiji  0.2
18 Dec 2020 03:00 Nukusa Fiji  0.2
17 Dec 2020 12:45 Matata New Zealand  0.2
17 Dec 2020 12:45 Awakaponga 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
15 Dec 2020 21:45 Korovou Fiji  0.2
17 Dec 2020 18:00 Nambouono Fiji  0.2
17 Dec 2020 19:00 Navakawau Fiji  0.2
15 Dec 2020 18:45 Port Awanui New Zealand  0.2
15 Dec 2020 18:45 Rangitukia New Zealand  0.2
16 Dec 2020 17:00 Tairua New Zealand  0.2
16 Dec 2020 17:00 Pauanui New Zealand  0.2
18 Dec 2020 04:00 Lakina Tuvalu  0.2
18 Dec 2020 03:45 Waihi Beach New Zealand  0.2
18 Dec 2020 03:45 Athenree New Zealand  0.2
18 Dec 2020 04:00 Tonga Tuvalu  0.2
18 Dec 2020 04:15 Vaitupu Tuvalu  0.2
17 Dec 2020 13:00 Ohope Beach New Zealand  0.1
16 Dec 2020 15:45 Hicks Bay New Zealand  0.1
16 Dec 2020 15:45 Te Araroa New Zealand  0.1
16 Dec 2020 15:45 Horoera New Zealand  0.1
16 Dec 2020 15:45 East Cape New Zealand  0.1
16 Dec 2020 04:30 Waiotahi New Zealand  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