Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga
14 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, Tonga, Niue
Exposed population 10 thousand in Category 1 or higher
Maximum wind speed 83 km/h
Maximum storm surge 0.9 m (17 Dec 12:00 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 83 km/h 0.9 m 23 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 210 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 12:00 UTC
CategoryCountryPopulation 
CAT. 2Fiji4,644 
CAT. 1Fiji7,226 
Tropical StormFiji, Tonga, Niue211,101
+
Fiji188,539 
Tonga21,372 
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 12:00 198 10 thousand
- - - 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 12:00 UTC
LevelCountryPopulation 
250-500 mmFiji1,330 
100-250 mmWallis and Futuna, Samoa, Tonga, Fiji, Niue840,053
+
Fiji650,153 
Wallis and Futuna11,636 
Samoa162,213 
Tonga14,861 
Niue1,190 
50-100 mmTuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga332,953
+
Tuvalu39 
Fiji239,302 
Wallis and Futuna3,925 
Samoa34,415 
American Samoa53,380 
Tonga1,892 

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 12:00 521 840 thousand
- - - Tuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga, Niue




Impact estimation for the next 72h
TOP

StormSurge

0.9 m

The maximum Storm surge height is  0.9m in Soso, Fiji. This height is estimated for 17 Dec 2020 12:00 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 12:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
17 Dec 2020 12:00 Soso Fiji  0.9
17 Dec 2020 12:00 Somosomo Fiji  0.9
17 Dec 2020 12:00 Matayalevu Fiji  0.9
17 Dec 2020 12:00 Matacawalevu Fiji  0.9
17 Dec 2020 12:00 Sisili Fiji  0.9
17 Dec 2020 11:00 Nacula Fiji  0.8
17 Dec 2020 11:00 Navotua Fiji  0.8
17 Dec 2020 11:00 Tamusua Fiji  0.8
17 Dec 2020 11:00 Teci Fiji  0.8
17 Dec 2020 11:00 Mbukama Fiji  0.8
17 Dec 2020 11:00 Yasawairara Fiji  0.8
15 Dec 2020 08:15 Lautoka Fiji  0.7
15 Dec 2020 08:15 Nailanga Fiji  0.7
15 Dec 2020 08:15 Sorokoba Fiji  0.7
15 Dec 2020 08:15 Ba Fiji  0.7
17 Dec 2020 12:00 Nalauwaki Fiji  0.6
15 Dec 2020 08:15 Natunuka Fiji  0.5
15 Dec 2020 08:15 Tavua Fiji  0.5
15 Dec 2020 08:15 Namaka Fiji  0.5
15 Dec 2020 00:15 Koroinasolo Fiji  0.5
15 Dec 2020 00:15 Savu Sau Fiji  0.5
15 Dec 2020 00:15 Navinggiri Fiji  0.5
15 Dec 2020 00:15 Yangganga Fiji  0.5
15 Dec 2020 00:15 Nawailevu Fiji  0.5
15 Dec 2020 00:45 Rabulu Fiji  0.5
15 Dec 2020 00:45 Togowere Fiji  0.5
15 Dec 2020 08:15 Solevu Fiji  0.4
15 Dec 2020 08:15 Tavua Fiji  0.4
14 Dec 2020 16:00 Korovou Fiji  0.4
14 Dec 2020 16:00 Lodoni Fiji  0.4
14 Dec 2020 16:00 Lawaki Fiji  0.4
14 Dec 2020 16:00 Ucunivanua Fiji  0.4
14 Dec 2020 16:00 Naingani Fiji  0.4
14 Dec 2020 16:00 Navuti Fiji  0.4
14 Dec 2020 16:00 Nasaga Fiji  0.4
14 Dec 2020 16:00 Rukuruku Fiji  0.4
14 Dec 2020 16:00 Lovoni Fiji  0.4
17 Dec 2020 07:30 Korosi Fiji  0.3
17 Dec 2020 07:30 Korotasere Fiji  0.3
17 Dec 2020 07:30 Naweni Fiji  0.3
17 Dec 2020 07:30 Viani Fiji  0.3
17 Dec 2020 07:30 Ndrekeniwai Fiji  0.3
17 Dec 2020 07:30 Mbangasau Fiji  0.3
14 Dec 2020 18:15 Otumoetai New Zealand  0.3
14 Dec 2020 18:15 Mount Maunganui New Zealand  0.3
14 Dec 2020 18:15 Matapihi New Zealand  0.3
14 Dec 2020 18:15 Kairua New Zealand  0.3
14 Dec 2020 18:15 Papamoa New Zealand  0.3
15 Dec 2020 00:15 Nasarowangga Fiji  0.3
17 Dec 2020 10:30 Nanukuloa Fiji  0.3
17 Dec 2020 10:30 Nasau Fiji  0.3
17 Dec 2020 10:30 Nayavutoka Fiji  0.3
14 Dec 2020 19:00 Te Puia New Zealand  0.3
14 Dec 2020 19:00 Te Puia Springs New Zealand  0.3
14 Dec 2020 19:00 Tokomaru Bay New Zealand  0.3
14 Dec 2020 19:00 Waipiro New Zealand  0.3
14 Dec 2020 19:00 Waipiro Bay New Zealand  0.3
14 Dec 2020 19:00 Whareponga New Zealand  0.3
14 Dec 2020 19:00 Tuparoa New Zealand  0.3
15 Dec 2020 00:00 Navindamu Fiji  0.3
15 Dec 2020 00:00 Nagumu Fiji  0.3
14 Dec 2020 18:00 Maketu New Zealand  0.3
14 Dec 2020 18:00 Maniatutu New Zealand  0.3
14 Dec 2020 18:00 Pukehina New Zealand  0.3
14 Dec 2020 18:00 Ohinepanea New Zealand  0.3
14 Dec 2020 18:00 Otamarakau New Zealand  0.3
14 Dec 2020 18:00 Pikowai New Zealand  0.3
16 Dec 2020 19:30 Natua Fiji  0.3
16 Dec 2020 19:30 Mbangata Fiji  0.3
16 Dec 2020 19:30 Savusavu Fiji  0.3
16 Dec 2020 19:30 Naindi Fiji  0.3
17 Dec 2020 12:00 Ndenimanu Fiji  0.3
14 Dec 2020 13:00 Lao Fiji  0.3
14 Dec 2020 13:00 Nailou Fiji  0.3
14 Dec 2020 13:00 Nawi Fiji  0.3
14 Dec 2020 13:00 Vunikura Fiji  0.3
14 Dec 2020 13:00 Napuka Fiji  0.3
14 Dec 2020 23:45 Nanduri Fiji  0.3
14 Dec 2020 23:45 Vatutandova Fiji  0.3
14 Dec 2020 23:45 Nasea Fiji  0.3
15 Dec 2020 00:30 Rakiraki Fiji  0.3
15 Dec 2020 00:30 Vaileka Fiji  0.3
15 Dec 2020 08:45 Nakarambo Fiji  0.3
14 Dec 2020 21:00 Nauouo Fiji  0.2
14 Dec 2020 21:00 Levuka Fiji  0.2
14 Dec 2020 16:00 Kasavu Fiji  0.2
14 Dec 2020 16:00 Naimasimasi Fiji  0.2
16 Dec 2020 16:15 Nadi Fiji  0.2
15 Dec 2020 00:30 Ndalomo Fiji  0.2
16 Dec 2020 16:15 Ndawara Fiji  0.2
16 Dec 2020 16:15 Waisa Fiji  0.2
15 Dec 2020 08:15 Malake Fiji  0.2
15 Dec 2020 08:15 Biagunu Fiji  0.2
14 Dec 2020 13:45 Vunivatu Fiji  0.2
14 Dec 2020 13:45 Navukembuli Fiji  0.2
14 Dec 2020 13:45 Naua Fiji  0.2
16 Dec 2020 19:15 Nabouwalu Fiji  0.2
16 Dec 2020 19:15 Thavanga Fiji  0.2
16 Dec 2020 19:15 Ndaria Fiji  0.2
16 Dec 2020 19:15 Rave-rave Fiji  0.2
14 Dec 2020 20:15 Vangai Fiji  0.2
16 Dec 2020 16:15 Momi Fiji  0.2
17 Dec 2020 11:00 Nasau Fiji  0.2
17 Dec 2020 11:00 Talaulia Fiji  0.2
17 Dec 2020 11:00 Nalotu Fiji  0.2
17 Dec 2020 11:00 Vunisea Fiji  0.2
17 Dec 2020 11:00 Mburelevu Fiji  0.2
17 Dec 2020 11:00 Mokoisa Fiji  0.2
17 Dec 2020 11:00 Naikorokoro Fiji  0.2
17 Dec 2020 11:00 Namara Fiji  0.2
14 Dec 2020 16:00 Nausori Fiji  0.2
14 Dec 2020 16:00 Lokia Fiji  0.2
14 Dec 2020 16:00 Cautata Fiji  0.2
14 Dec 2020 16:00 Nasilai Fiji  0.2
14 Dec 2020 16:00 Dromuna Fiji  0.2
15 Dec 2020 00:30 Naruwai Fiji  0.2
17 Dec 2020 08:00 Namboutini Fiji  0.2
16 Dec 2020 16:30 Gasele Fiji  0.2
16 Dec 2020 16:30 Soso Fiji  0.2
16 Dec 2020 16:30 Kavala Fiji  0.2
16 Dec 2020 16:30 Kaduvu 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 07:00 Namukalau Fiji  0.2
17 Dec 2020 12:00 Lomawal Fiji  0.2
17 Dec 2020 12:00 Mbatiri Fiji  0.2
16 Dec 2020 08:15 Tawake Fiji  0.2
17 Dec 2020 12:00 Cuvu Fiji  0.2
17 Dec 2020 12:00 Sigatoka Fiji  0.2
17 Dec 2020 12:00 Laselase Fiji  0.2
17 Dec 2020 12:00 Vatukarasa Fiji  0.2
16 Dec 2020 08:00 Sumi Fiji  0.2
16 Dec 2020 08:45 Elsee Fiji  0.2
14 Dec 2020 17:45 Matata New Zealand  0.2
14 Dec 2020 17:45 Awakaponga New Zealand  0.2
14 Dec 2020 17:45 Thornton New Zealand  0.2
14 Dec 2020 17:45 Poroporo New Zealand  0.2
14 Dec 2020 17:45 Whakatane New Zealand  0.2
17 Dec 2020 12:00 Korolevu Fiji  0.2
17 Dec 2020 03:15 Nakondu Fiji  0.2
17 Dec 2020 03:15 Nathamaki Fiji  0.2
17 Dec 2020 03:15 Nasau Fiji  0.2
16 Dec 2020 02:30 Opoutere New Zealand  0.2
16 Dec 2020 02:30 Whangamata New Zealand  0.2
16 Dec 2020 08:15 Nukusa Fiji  0.2
16 Dec 2020 08:15 Nambouono Fiji  0.2
17 Dec 2020 12:00 Taunovo Fiji  0.2
17 Dec 2020 12:00 Korovisilou Fiji  0.2
17 Dec 2020 04:00 Galoa Fiji  0.2
17 Dec 2020 04:00 Yanutha Fiji  0.2
17 Dec 2020 04:00 Matavuralevu Fiji  0.2
17 Dec 2020 04:00 Pacific Harbour Fiji  0.2
17 Dec 2020 04:00 Waisomo Fiji  0.2
17 Dec 2020 04:00 Dakuimbeqa Fiji  0.2
17 Dec 2020 04:00 Lalati Fiji  0.2
17 Dec 2020 04:00 Navua Fiji  0.2
17 Dec 2020 04:00 Naitionitoni Fiji  0.2
17 Dec 2020 04:00 Mau Fiji  0.2
17 Dec 2020 12:00 Bouwanga Fiji  0.2
16 Dec 2020 03:30 Port Awanui New Zealand  0.1
16 Dec 2020 03:30 Rangitukia New Zealand  0.1
17 Dec 2020 10:45 Waihi Beach New Zealand  0.1
17 Dec 2020 10:45 Athenree New Zealand  0.1
16 Dec 2020 09:00 Lakina Tuvalu  0.1
16 Dec 2020 08:45 Tonga Tuvalu  0.1
16 Dec 2020 15:45 Makongai Fiji  0.1
15 Dec 2020 09:00 Keteira Fiji  0.1
16 Dec 2020 09:00 Vaitupu Tuvalu  0.1
15 Dec 2020 18:45 Vione Fiji  0.1
15 Dec 2020 18:45 Dalice Fiji  0.1
16 Dec 2020 19:00 Sawaieke Fiji  0.1
17 Dec 2020 12:00 Kalokolevu Fiji  0.1
17 Dec 2020 12:00 Suva Fiji  0.1
17 Dec 2020 12:00 Tamavua Fiji  0.1
17 Dec 2020 12:00 Lauthala Bay Fiji  0.1
17 Dec 2020 12:00 Laucala Fiji  0.1
15 Dec 2020 09:15 Korovou Fiji  0.1
15 Dec 2020 19:00 Navakawau Fiji  0.1
17 Dec 2020 03:00 Vandravandra Fiji  0.1
15 Dec 2020 18:30 Andako Fiji  0.1