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 HWRF
Exposed countries Tonga, Niue
Exposed population No people in Category 1 or higher
Maximum wind speed 112 km/h
Maximum storm surge 1.1 m (17 Dec 22:00 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
HWRF Current 112 km/h 1.1 m 31 mm 0.5
HWRF Overall 112 km/h 1.1 m 640 mm 0.5

Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

TOP

Wind

112 km/h

Up to 6 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 
Tropical StormTonga, Niue6,074
+
Tonga4,884 
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 97 - - - - - - -
GREEN 2 13 Dec 2020 18:00 86 - - - - - - -
GREEN 3 14 Dec 2020 00:00 83 - - - - - - -
GREEN 4 14 Dec 2020 06:00 90 -
- - - - - Tonga
GREEN 5 14 Dec 2020 12:00 101 -
- - - - - Tonga
GREEN 6 14 Dec 2020 18:00 90 -
- - - - - Tonga
GREEN 7 15 Dec 2020 00:00 130 -
- - - - - Tonga, Niue
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 15 Dec 2020 00:00 UTC
LevelCountryPopulation 
50-100 mmNiue1,190 

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 12:00 27 - - - - - - -
Blue 2 13 Dec 2020 18:00 24 - - - - - - -
Blue 3 14 Dec 2020 00:00 23 - - - - - - -
Blue 4 14 Dec 2020 06:00 25 1 thousand - - - - - - Tonga
Blue 5 14 Dec 2020 12:00 28 20 thousand - - - - - - Tonga
Blue 6 14 Dec 2020 18:00 25 9 thousand - - - - - - Tonga
Blue 7 15 Dec 2020 00:00 463 -
- - - - - Niue




Impact estimation for the next 72h
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StormSurge

1.1 m

The maximum Storm surge height is  1.1m in Natunuka, Fiji. This height is estimated for 17 Dec 2020 22:00 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 15 Dec 2020 00:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
17 Dec 2020 22:00 Natunuka Fiji  1.1
17 Dec 2020 22:00 Tavua Fiji  1.1
17 Dec 2020 22:00 Rabulu Fiji  1.1
17 Dec 2020 22:00 Togowere Fiji  1.1
17 Dec 2020 18:30 Matacawalevu Fiji  0.9
17 Dec 2020 18:30 Sisili Fiji  0.9
17 Dec 2020 18:30 Nacula Fiji  0.9
17 Dec 2020 18:30 Navotua Fiji  0.9
17 Dec 2020 18:30 Tamusua Fiji  0.9
17 Dec 2020 18:30 Teci Fiji  0.9
17 Dec 2020 18:30 Mbukama Fiji  0.9
17 Dec 2020 18:30 Yasawairara Fiji  0.9
17 Dec 2020 22:15 Soso Fiji  0.9
17 Dec 2020 22:15 Somosomo Fiji  0.9
17 Dec 2020 19:30 Nailanga Fiji  0.9
17 Dec 2020 19:30 Sorokoba Fiji  0.9
17 Dec 2020 19:30 Ba Fiji  0.9
17 Dec 2020 19:15 Lautoka Fiji  0.9
17 Dec 2020 22:00 Rakiraki Fiji  0.8
17 Dec 2020 22:00 Vaileka Fiji  0.8
17 Dec 2020 22:00 Nanukuloa Fiji  0.8
17 Dec 2020 18:15 Nalauwaki Fiji  0.8
17 Dec 2020 18:00 Matayalevu Fiji  0.8
17 Dec 2020 22:00 Nasau Fiji  0.7
17 Dec 2020 22:00 Nayavutoka Fiji  0.7
17 Dec 2020 19:45 Tavua Fiji  0.6
17 Dec 2020 19:30 Solevu Fiji  0.6
17 Dec 2020 18:30 Koroinasolo Fiji  0.5
17 Dec 2020 18:30 Savu Sau Fiji  0.5
17 Dec 2020 18:30 Navinggiri Fiji  0.5
17 Dec 2020 18:30 Yangganga Fiji  0.5
17 Dec 2020 18:30 Nawailevu Fiji  0.5
15 Dec 2020 20:00 Namaka Fiji  0.5
17 Dec 2020 23:15 Nadi Fiji  0.5
17 Dec 2020 22:00 Lawaki Fiji  0.4
17 Dec 2020 21:45 Ndenimanu Fiji  0.4
17 Dec 2020 18:30 Navindamu Fiji  0.4
17 Dec 2020 18:30 Nagumu Fiji  0.4
16 Dec 2020 11:45 Natua Fiji  0.4
16 Dec 2020 11:45 Mbangata Fiji  0.4
16 Dec 2020 11:45 Savusavu Fiji  0.4
16 Dec 2020 11:45 Naindi Fiji  0.4
16 Dec 2020 11:45 Korosi Fiji  0.4
17 Dec 2020 22:00 Ndalomo Fiji  0.4
17 Dec 2020 18:15 Nasarowangga Fiji  0.4
17 Dec 2020 18:00 Nanduri Fiji  0.4
17 Dec 2020 18:00 Vatutandova Fiji  0.4
17 Dec 2020 18:00 Nasea Fiji  0.4
17 Dec 2020 22:00 Lodoni Fiji  0.4
17 Dec 2020 22:00 Naingani Fiji  0.4
18 Dec 2020 00:00 Kasavu Fiji  0.4
18 Dec 2020 00:00 Nausori Fiji  0.4
18 Dec 2020 00:00 Korovou Fiji  0.4
18 Dec 2020 00:00 Lokia Fiji  0.4
18 Dec 2020 00:00 Naimasimasi Fiji  0.4
18 Dec 2020 00:00 Ucunivanua Fiji  0.4
18 Dec 2020 00:00 Cautata Fiji  0.4
18 Dec 2020 00:00 Nasilai Fiji  0.4
18 Dec 2020 00:00 Dromuna Fiji  0.4
17 Dec 2020 19:45 Korotasere Fiji  0.3
17 Dec 2020 19:45 Naweni Fiji  0.3
17 Dec 2020 19:45 Viani Fiji  0.3
17 Dec 2020 19:45 Ndrekeniwai Fiji  0.3
17 Dec 2020 19:45 Mbangasau Fiji  0.3
17 Dec 2020 19:15 Navuti Fiji  0.3
17 Dec 2020 19:15 Nasaga Fiji  0.3
17 Dec 2020 19:15 Rukuruku Fiji  0.3
17 Dec 2020 19:15 Lovoni Fiji  0.3
17 Dec 2020 19:45 Momi Fiji  0.3
17 Dec 2020 19:00 Naruwai Fiji  0.3
15 Dec 2020 21:00 Gasele Fiji  0.3
15 Dec 2020 21:00 Soso Fiji  0.3
15 Dec 2020 21:00 Kavala Fiji  0.3
15 Dec 2020 21:00 Kaduvu Fiji  0.3
15 Dec 2020 21:00 Nukuvou Fiji  0.3
15 Dec 2020 21:00 Nabouwalu Fiji  0.3
15 Dec 2020 21:00 Vabea Fiji  0.3
17 Dec 2020 19:45 Lomawal Fiji  0.3
17 Dec 2020 19:00 Nabouwalu Fiji  0.3
17 Dec 2020 19:15 Thavanga Fiji  0.3
17 Dec 2020 19:45 Mbatiri Fiji  0.3
16 Dec 2020 19:15 Lao Fiji  0.3
16 Dec 2020 19:15 Nailou Fiji  0.3
16 Dec 2020 19:15 Nawi Fiji  0.3
16 Dec 2020 19:15 Vunikura Fiji  0.3
16 Dec 2020 19:15 Napuka Fiji  0.3
17 Dec 2020 19:45 Nakarambo Fiji  0.3
15 Dec 2020 06:15 Otumoetai New Zealand  0.3
15 Dec 2020 06:15 Mount Maunganui New Zealand  0.3
15 Dec 2020 06:15 Matapihi New Zealand  0.3
15 Dec 2020 06:15 Kairua New Zealand  0.3
15 Dec 2020 06:15 Papamoa New Zealand  0.3
17 Dec 2020 18:45 Nauouo Fiji  0.3
17 Dec 2020 18:45 Levuka Fiji  0.3
15 Dec 2020 08:00 Opoutere New Zealand  0.3
15 Dec 2020 08:00 Whangamata New Zealand  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 Ndawara Fiji  0.3
16 Dec 2020 18:15 Waisa Fiji  0.3
18 Dec 2020 00:00 Cuvu Fiji  0.3
18 Dec 2020 00:00 Sigatoka Fiji  0.3
18 Dec 2020 00:00 Laselase Fiji  0.3
18 Dec 2020 00:00 Vatukarasa Fiji  0.3
18 Dec 2020 00:00 Korolevu Fiji  0.3
16 Dec 2020 11:30 Vunivatu Fiji  0.2
16 Dec 2020 11:30 Navukembuli Fiji  0.2
16 Dec 2020 11:30 Naua Fiji  0.2
15 Dec 2020 09:30 Vunisea Fiji  0.2
15 Dec 2020 09:30 Mburelevu Fiji  0.2
15 Dec 2020 09:30 Mokoisa Fiji  0.2
15 Dec 2020 09:30 Naikorokoro Fiji  0.2
15 Dec 2020 09:30 Namara Fiji  0.2
15 Dec 2020 10:45 Malake Fiji  0.2
15 Dec 2020 10:45 Biagunu Fiji  0.2
15 Dec 2020 11:45 Namboutini Fiji  0.2
15 Dec 2020 11:45 Tawake Fiji  0.2
17 Dec 2020 20:00 Korovisilou Fiji  0.2
17 Dec 2020 20:00 Galoa Fiji  0.2
17 Dec 2020 20:00 Yanutha Fiji  0.2
17 Dec 2020 18:30 Namukalau Fiji  0.2
15 Dec 2020 08:30 Waihi Beach New Zealand  0.2
15 Dec 2020 08:30 Athenree New Zealand  0.2
17 Dec 2020 19:00 Makongai Fiji  0.2
17 Dec 2020 20:00 Taunovo Fiji  0.2
17 Dec 2020 20:00 Matavuralevu Fiji  0.2
15 Dec 2020 09:45 Nasau Fiji  0.2
15 Dec 2020 09:45 Talaulia Fiji  0.2
15 Dec 2020 09:45 Nalotu Fiji  0.2
16 Dec 2020 05:15 Maketu New Zealand  0.2
16 Dec 2020 05:15 Maniatutu New Zealand  0.2
16 Dec 2020 05:15 Pukehina New Zealand  0.2
16 Dec 2020 05:15 Ohinepanea New Zealand  0.2
16 Dec 2020 05:15 Otamarakau New Zealand  0.2
16 Dec 2020 05:15 Pikowai New Zealand  0.2
16 Dec 2020 11:45 Vangai Fiji  0.2
18 Dec 2020 00:00 Pacific Harbour Fiji  0.2
18 Dec 2020 00:00 Waisomo Fiji  0.2
18 Dec 2020 00:00 Dakuimbeqa Fiji  0.2
15 Dec 2020 06:15 Tairua New Zealand  0.2
15 Dec 2020 06:15 Pauanui New Zealand  0.2
17 Dec 2020 20:00 Bouwanga Fiji  0.2
17 Dec 2020 19:45 Lalati Fiji  0.2
17 Dec 2020 19:30 Navua Fiji  0.2
17 Dec 2020 19:30 Naitionitoni Fiji  0.2
17 Dec 2020 19:30 Mau Fiji  0.2
17 Dec 2020 19:30 Kalokolevu Fiji  0.2
15 Dec 2020 20:15 Te Puia New Zealand  0.2
15 Dec 2020 20:15 Te Puia Springs New Zealand  0.2
15 Dec 2020 20:15 Tokomaru Bay New Zealand  0.2
15 Dec 2020 20:15 Waipiro New Zealand  0.2
15 Dec 2020 20:15 Waipiro Bay New Zealand  0.2
15 Dec 2020 20:15 Whareponga New Zealand  0.2
15 Dec 2020 20:15 Tuparoa New Zealand  0.2
17 Dec 2020 20:00 Suva Fiji  0.2
17 Dec 2020 20:00 Tamavua Fiji  0.2
17 Dec 2020 20:00 Lauthala Bay Fiji  0.2
17 Dec 2020 20:00 Laucala Fiji  0.2
17 Dec 2020 12:15 Nakondu Fiji  0.2
17 Dec 2020 12:15 Nathamaki Fiji  0.2
17 Dec 2020 12:15 Nasau Fiji  0.2
16 Dec 2020 20:00 Elsee Fiji  0.2
16 Dec 2020 20:00 Sumi Fiji  0.2
17 Dec 2020 18:30 Nukusa Fiji  0.2
16 Dec 2020 07:15 Matata New Zealand  0.2
16 Dec 2020 07:15 Awakaponga New Zealand  0.2
16 Dec 2020 20:15 Nambouono Fiji  0.2
16 Dec 2020 19:00 Keteira Fiji  0.2
15 Dec 2020 10:15 Sawaieke Fiji  0.2
15 Dec 2020 10:15 Vione Fiji  0.2
15 Dec 2020 10:15 Dalice Fiji  0.2
16 Dec 2020 19:45 Korovou Fiji  0.2
16 Dec 2020 04:45 Thornton New Zealand  0.2
17 Dec 2020 19:45 Vandravandra Fiji  0.2
15 Dec 2020 18:45 Port Awanui New Zealand  0.1
15 Dec 2020 18:45 Rangitukia New Zealand  0.1
16 Dec 2020 18:30 Navakawau Fiji  0.1
15 Dec 2020 10:30 Lakina Tuvalu  0.1
15 Dec 2020 10:45 Tonga Tuvalu  0.1
16 Dec 2020 19:00 Andako Fiji  0.1
16 Dec 2020 04:45 Poroporo New Zealand  0.1
16 Dec 2020 04:45 Whakatane New Zealand  0.1
16 Dec 2020 20:30 Vaitupu Tuvalu  0.1
16 Dec 2020 04:30 Ohope Beach New Zealand  0.1
16 Dec 2020 04:30 Waiotahi New Zealand  0.1
16 Dec 2020 04:15 Horoera New Zealand  0.1
16 Dec 2020 04:15 East Cape New Zealand  0.1
16 Dec 2020 04:45 Opotiki New Zealand  0.1
15 Dec 2020 19:15 Te Araroa New Zealand  0.1