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 ECMWF
Exposed countries Fiji, Niue, Tonga
Exposed population 20 thousand in Category 1 or higher
Maximum wind speed 101 km/h
Maximum storm surge 1.7 m (17 Dec 06:15 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 101 km/h 1.7 m 28 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 12:00 UTC
CategoryCountryPopulation 
CAT. 2Fiji7,018 
CAT. 1Fiji10,091 
Tropical StormFiji, Niue, Tonga225,709
+
Fiji215,032 
Niue1,190 
Tonga9,487 

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 97 -
- - - - - Tonga
GREEN 6 15 Dec 2020 12:00 184 20 thousand
- - - Fiji, Niue, Tonga
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 mmFiji13,830 
100-250 mmSamoa, American Samoa, Tonga, Fiji788,441
+
Fiji671,218 
Samoa115,307 
American Samoa855 
Tonga1,061 
50-100 mmTuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga, Niue447,810
+
Tuvalu39 
Fiji211,522 
Wallis and Futuna15,561 
Samoa81,209 
American Samoa53,645 
Tonga84,644 
Niue1,190 

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 27 20 thousand - - - - - - Tonga
Blue 6 15 Dec 2020 12:00 444 800 thousand
- - - Tuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga, Niue




Impact estimation for the next 72h
TOP

StormSurge

1.7 m

The maximum Storm surge height is  1.7m in Navindamu, Fiji. This height is estimated for 17 Dec 2020 06:15 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 06:15 Navindamu Fiji  1.7
17 Dec 2020 06:15 Nagumu Fiji  1.7
17 Dec 2020 05:30 Koroinasolo Fiji  1.6
17 Dec 2020 05:30 Savu Sau Fiji  1.6
17 Dec 2020 05:30 Navinggiri Fiji  1.6
17 Dec 2020 05:30 Yangganga Fiji  1.6
17 Dec 2020 05:30 Nawailevu Fiji  1.6
17 Dec 2020 05:15 Nasarowangga Fiji  1.2
17 Dec 2020 06:00 Ndalomo Fiji  0.9
17 Dec 2020 09:00 Korosi Fiji  0.8
17 Dec 2020 09:00 Korotasere Fiji  0.8
17 Dec 2020 09:00 Naweni Fiji  0.8
17 Dec 2020 09:00 Viani Fiji  0.8
17 Dec 2020 09:00 Ndrekeniwai Fiji  0.8
17 Dec 2020 09:00 Mbangasau Fiji  0.8
17 Dec 2020 05:45 Ndenimanu Fiji  0.8
17 Dec 2020 06:00 Nanduri Fiji  0.8
17 Dec 2020 08:15 Ndaria Fiji  0.7
17 Dec 2020 08:15 Rave-rave Fiji  0.7
17 Dec 2020 08:15 Ndawara Fiji  0.7
17 Dec 2020 08:15 Waisa Fiji  0.7
17 Dec 2020 07:00 Nabouwalu Fiji  0.7
17 Dec 2020 07:00 Thavanga Fiji  0.7
17 Dec 2020 06:30 Vatutandova Fiji  0.7
17 Dec 2020 06:30 Nasea Fiji  0.7
17 Dec 2020 11:00 Nakondu Fiji  0.7
17 Dec 2020 11:00 Nathamaki Fiji  0.7
17 Dec 2020 11:00 Nasau Fiji  0.7
17 Dec 2020 08:15 Natua Fiji  0.6
17 Dec 2020 09:00 Savusavu Fiji  0.6
17 Dec 2020 06:45 Naruwai Fiji  0.6
17 Dec 2020 08:45 Mbangata Fiji  0.6
17 Dec 2020 08:45 Naindi Fiji  0.6
17 Dec 2020 07:30 Nakarambo Fiji  0.5
17 Dec 2020 13:00 Dalice Fiji  0.5
15 Dec 2020 19:45 Lautoka Fiji  0.5
15 Dec 2020 19:45 Nailanga Fiji  0.5
15 Dec 2020 19:45 Sorokoba Fiji  0.5
15 Dec 2020 19:45 Ba Fiji  0.5
17 Dec 2020 09:45 Makongai Fiji  0.5
17 Dec 2020 11:00 Navakawau Fiji  0.5
17 Dec 2020 08:00 Malake Fiji  0.4
17 Dec 2020 08:00 Biagunu Fiji  0.4
17 Dec 2020 11:00 Korovou Fiji  0.4
17 Dec 2020 04:15 Nanukuloa Fiji  0.4
17 Dec 2020 04:15 Nasau Fiji  0.4
17 Dec 2020 04:15 Nayavutoka Fiji  0.4
17 Dec 2020 06:45 Vunivatu Fiji  0.4
17 Dec 2020 06:45 Navukembuli Fiji  0.4
17 Dec 2020 07:15 Natunuka Fiji  0.4
17 Dec 2020 07:15 Tavua Fiji  0.4
17 Dec 2020 07:15 Rabulu Fiji  0.4
17 Dec 2020 07:15 Togowere Fiji  0.4
17 Dec 2020 02:30 Mbukama Fiji  0.4
17 Dec 2020 02:30 Yasawairara Fiji  0.4
17 Dec 2020 05:45 Naua Fiji  0.4
17 Dec 2020 05:45 Namukalau Fiji  0.4
15 Dec 2020 23:15 Namaka Fiji  0.4
17 Dec 2020 02:15 Nacula Fiji  0.4
17 Dec 2020 02:15 Navotua Fiji  0.4
17 Dec 2020 02:15 Tamusua Fiji  0.4
17 Dec 2020 02:15 Teci Fiji  0.4
17 Dec 2020 11:00 Vangai Fiji  0.4
17 Dec 2020 03:45 Korovou Fiji  0.4
17 Dec 2020 03:45 Lodoni Fiji  0.4
17 Dec 2020 03:45 Lawaki Fiji  0.4
17 Dec 2020 03:45 Naingani Fiji  0.4
17 Dec 2020 03:45 Navuti Fiji  0.4
17 Dec 2020 03:45 Nasaga Fiji  0.4
17 Dec 2020 03:45 Rukuruku Fiji  0.4
17 Dec 2020 03:45 Lovoni 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 08:00 Lao Fiji  0.4
17 Dec 2020 08:00 Nailou Fiji  0.4
17 Dec 2020 08:00 Nawi Fiji  0.4
17 Dec 2020 08:00 Vunikura Fiji  0.4
17 Dec 2020 08:00 Napuka Fiji  0.4
17 Dec 2020 12:45 Vione Fiji  0.4
17 Dec 2020 13:00 Sawaieke Fiji  0.3
17 Dec 2020 07:45 Namboutini Fiji  0.3
17 Dec 2020 07:45 Tawake Fiji  0.3
16 Dec 2020 03:30 Ucunivanua Fiji  0.3
17 Dec 2020 07:00 Rakiraki Fiji  0.3
17 Dec 2020 07:00 Vaileka Fiji  0.3
17 Dec 2020 03:45 Kasavu Fiji  0.3
17 Dec 2020 03:45 Naimasimasi Fiji  0.3
17 Dec 2020 17:45 Keteira Fiji  0.3
17 Dec 2020 02:45 Nalauwaki Fiji  0.3
17 Dec 2020 03:30 Nausori Fiji  0.3
17 Dec 2020 03:30 Cautata Fiji  0.3
17 Dec 2020 03:30 Dromuna Fiji  0.3
17 Dec 2020 09:45 Nauouo Fiji  0.3
17 Dec 2020 09:45 Levuka Fiji  0.3
17 Dec 2020 03:45 Lokia Fiji  0.3
17 Dec 2020 03:45 Nasilai Fiji  0.3
17 Dec 2020 02:00 Solevu Fiji  0.3
17 Dec 2020 02:15 Tavua Fiji  0.3
17 Dec 2020 13:00 Vandravandra Fiji  0.3
17 Dec 2020 11:45 Gasele Fiji  0.3
17 Dec 2020 11:45 Soso Fiji  0.3
17 Dec 2020 11:45 Kavala Fiji  0.3
17 Dec 2020 11:45 Kaduvu Fiji  0.3
17 Dec 2020 11:45 Nukuvou Fiji  0.3
17 Dec 2020 11:45 Nabouwalu Fiji  0.3
17 Dec 2020 11:45 Vabea Fiji  0.3
17 Dec 2020 09:00 Nukusa Fiji  0.3
16 Dec 2020 16:15 Nadi Fiji  0.3
16 Dec 2020 16:30 Vunisea Fiji  0.2
16 Dec 2020 16:30 Mburelevu Fiji  0.2
16 Dec 2020 16:30 Mokoisa Fiji  0.2
16 Dec 2020 16:30 Naikorokoro Fiji  0.2
16 Dec 2020 16:30 Namara Fiji  0.2
17 Dec 2020 06:15 Nambouono Fiji  0.2
16 Dec 2020 05:45 Te Puia New Zealand  0.2
16 Dec 2020 05:45 Te Puia Springs New Zealand  0.2
16 Dec 2020 05:45 Tokomaru Bay New Zealand  0.2
16 Dec 2020 05:45 Waipiro New Zealand  0.2
16 Dec 2020 05:45 Waipiro Bay New Zealand  0.2
16 Dec 2020 05:45 Whareponga New Zealand  0.2
16 Dec 2020 05:45 Tuparoa New Zealand  0.2
17 Dec 2020 02:30 Momi Fiji  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
17 Dec 2020 17:00 Galoa Fiji  0.2
17 Dec 2020 17:00 Yanutha Fiji  0.2
17 Dec 2020 17:00 Matavuralevu Fiji  0.2
17 Dec 2020 17:00 Pacific Harbour Fiji  0.2
17 Dec 2020 17:00 Waisomo Fiji  0.2
17 Dec 2020 17:00 Dakuimbeqa Fiji  0.2
17 Dec 2020 17:00 Lalati Fiji  0.2
17 Dec 2020 17:00 Navua Fiji  0.2
17 Dec 2020 17:00 Naitionitoni Fiji  0.2
17 Dec 2020 17:00 Mau Fiji  0.2
17 Dec 2020 03:30 Opoutere New Zealand  0.2
17 Dec 2020 03:30 Whangamata New Zealand  0.2
16 Dec 2020 16:15 Nasau Fiji  0.2
16 Dec 2020 16:15 Talaulia Fiji  0.2
16 Dec 2020 16:15 Nalotu Fiji  0.2
17 Dec 2020 18:15 Andako Fiji  0.2
17 Dec 2020 02:15 Lomawal Fiji  0.2
16 Dec 2020 08:15 Elsee Fiji  0.2
16 Dec 2020 08:15 Sumi Fiji  0.2
17 Dec 2020 02:45 Korovisilou Fiji  0.2
16 Dec 2020 02:30 Tairua New Zealand  0.2
16 Dec 2020 02:30 Pauanui New Zealand  0.2
17 Dec 2020 02:15 Mbatiri Fiji  0.2
17 Dec 2020 02:30 Cuvu Fiji  0.2
17 Dec 2020 02:30 Sigatoka Fiji  0.2
17 Dec 2020 02:30 Laselase Fiji  0.2
17 Dec 2020 02:30 Vatukarasa Fiji  0.2
17 Dec 2020 02:30 Korolevu Fiji  0.2
17 Dec 2020 09:45 Laucala Fiji  0.2
17 Dec 2020 01:45 Kalokolevu 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 12:30 Maketu New Zealand  0.2
17 Dec 2020 12:30 Maniatutu New Zealand  0.2
17 Dec 2020 12:30 Pukehina New Zealand  0.2
17 Dec 2020 12:30 Ohinepanea New Zealand  0.2
17 Dec 2020 12:30 Otamarakau New Zealand  0.2
17 Dec 2020 12:30 Pikowai New Zealand  0.2
17 Dec 2020 09:45 Suva Fiji  0.2
17 Dec 2020 09:45 Tamavua Fiji  0.2
17 Dec 2020 09:45 Lauthala Bay Fiji  0.2
17 Dec 2020 02:30 Taunovo Fiji  0.2
16 Dec 2020 16:00 Waihi Beach New Zealand  0.2
16 Dec 2020 16:00 Athenree New Zealand  0.2
17 Dec 2020 02:30 Bouwanga Fiji  0.2
17 Dec 2020 16:45 Lakina Tuvalu  0.1
17 Dec 2020 16:45 Tonga Tuvalu  0.1
17 Dec 2020 16:45 Vaitupu Tuvalu  0.1
16 Dec 2020 06:30 Matata New Zealand  0.1
16 Dec 2020 06:30 Awakaponga New Zealand  0.1
16 Dec 2020 06:30 Thornton New Zealand  0.1
16 Dec 2020 06:30 Poroporo New Zealand  0.1
16 Dec 2020 06:30 Whakatane New Zealand  0.1
16 Dec 2020 03:45 Horoera New Zealand  0.1
16 Dec 2020 03:45 East Cape New Zealand  0.1
16 Dec 2020 03:45 Hicks Bay New Zealand  0.1
16 Dec 2020 03:45 Te Araroa New Zealand  0.1