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 HWRF
Exposed countries Tonga, Niue
Exposed population No people in Category 1 or higher
Maximum wind speed 101 km/h
Maximum storm surge 0.6 m (15 Dec 20:00 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 101 km/h 0.6 m 28 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 20 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 
Tropical StormTonga, Niue23,282
+
Tonga22,095 
Niue1,187 

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 12:00 137 -
- - - - - 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 
100-250 mmTonga, Niue178
+
Tonga59 
Niue119 
50-100 mmTonga, Niue16,399
+
Tonga15,361 
Niue1,038 

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 12:00 453 Few people
- - - - Tonga, Niue




Impact estimation for the next 72h
TOP

StormSurge

0.6 m

The maximum Storm surge height is  0.6m in Lautoka, Fiji. This height is estimated for 15 Dec 2020 20:00 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)
15 Dec 2020 20:00 Lautoka Fiji  0.6
15 Dec 2020 20:00 Nailanga Fiji  0.6
15 Dec 2020 20:00 Sorokoba Fiji  0.6
15 Dec 2020 20:15 Ba Fiji  0.6
15 Dec 2020 20:00 Namaka Fiji  0.5
15 Dec 2020 20:00 Natunuka Fiji  0.5
15 Dec 2020 20:15 Tavua Fiji  0.5
15 Dec 2020 12:15 Koroinasolo Fiji  0.5
15 Dec 2020 12:15 Savu Sau Fiji  0.5
15 Dec 2020 12:15 Navinggiri Fiji  0.5
15 Dec 2020 12:15 Yangganga Fiji  0.5
15 Dec 2020 12:15 Nawailevu Fiji  0.5
14 Dec 2020 13:00 Korovou Fiji  0.4
14 Dec 2020 13:00 Lodoni Fiji  0.4
14 Dec 2020 13:00 Lawaki Fiji  0.4
14 Dec 2020 13:00 Ucunivanua Fiji  0.4
14 Dec 2020 13:00 Naingani Fiji  0.4
14 Dec 2020 13:00 Navuti Fiji  0.4
14 Dec 2020 13:00 Nasaga Fiji  0.4
14 Dec 2020 13:00 Rukuruku Fiji  0.4
14 Dec 2020 13:00 Lovoni Fiji  0.4
16 Dec 2020 18:30 Natua Fiji  0.4
16 Dec 2020 18:30 Mbangata Fiji  0.4
16 Dec 2020 18:30 Savusavu Fiji  0.4
16 Dec 2020 18:30 Naindi Fiji  0.4
16 Dec 2020 18:30 Korosi Fiji  0.4
15 Dec 2020 20:00 Solevu Fiji  0.4
15 Dec 2020 20:00 Tavua Fiji  0.4
15 Dec 2020 20:00 Soso Fiji  0.3
15 Dec 2020 20:00 Somosomo Fiji  0.3
15 Dec 2020 20:15 Nalauwaki Fiji  0.3
14 Dec 2020 21:15 Rabulu Fiji  0.3
14 Dec 2020 21:15 Togowere Fiji  0.3
15 Dec 2020 20:15 Matayalevu Fiji  0.3
15 Dec 2020 20:00 Matacawalevu Fiji  0.3
15 Dec 2020 20:00 Sisili Fiji  0.3
15 Dec 2020 10:00 Korotasere Fiji  0.3
15 Dec 2020 10:00 Naweni Fiji  0.3
15 Dec 2020 10:00 Viani Fiji  0.3
15 Dec 2020 10:00 Ndrekeniwai Fiji  0.3
15 Dec 2020 10:00 Mbangasau Fiji  0.3
14 Dec 2020 21:00 Lao Fiji  0.3
14 Dec 2020 21:00 Nailou Fiji  0.3
14 Dec 2020 21:00 Nawi Fiji  0.3
14 Dec 2020 21:00 Vunikura Fiji  0.3
14 Dec 2020 21:00 Napuka 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
15 Dec 2020 10:00 Gasele Fiji  0.3
15 Dec 2020 10:00 Soso Fiji  0.3
15 Dec 2020 10:00 Kavala Fiji  0.3
15 Dec 2020 10:00 Kaduvu Fiji  0.3
15 Dec 2020 10:00 Nukuvou Fiji  0.3
15 Dec 2020 10:00 Nabouwalu Fiji  0.3
15 Dec 2020 10:00 Vabea Fiji  0.3
14 Dec 2020 17:45 Navindamu Fiji  0.3
14 Dec 2020 17:45 Nagumu Fiji  0.3
14 Dec 2020 17:45 Rakiraki Fiji  0.3
14 Dec 2020 17:45 Vaileka Fiji  0.3
14 Dec 2020 17:45 Nanukuloa Fiji  0.3
14 Dec 2020 18:30 Nakarambo Fiji  0.3
14 Dec 2020 13:00 Nauouo Fiji  0.3
14 Dec 2020 13:00 Levuka Fiji  0.3
17 Dec 2020 04:15 Nasau Fiji  0.3
17 Dec 2020 04:15 Nayavutoka Fiji  0.3
14 Dec 2020 13:00 Kasavu Fiji  0.3
14 Dec 2020 13:00 Naimasimasi Fiji  0.3
15 Dec 2020 10:15 Nabouwalu Fiji  0.3
15 Dec 2020 10:15 Thavanga Fiji  0.3
15 Dec 2020 10:15 Ndaria Fiji  0.3
15 Dec 2020 10:15 Rave-rave Fiji  0.3
16 Dec 2020 10:00 Ndawara Fiji  0.3
16 Dec 2020 10:00 Waisa Fiji  0.3
15 Dec 2020 12:00 Nasarowangga Fiji  0.3
14 Dec 2020 23:15 Malake Fiji  0.3
14 Dec 2020 23:15 Biagunu Fiji  0.3
16 Dec 2020 18:45 Nausori Fiji  0.3
16 Dec 2020 18:45 Lokia Fiji  0.3
16 Dec 2020 18:45 Cautata Fiji  0.3
16 Dec 2020 18:45 Nasilai Fiji  0.3
16 Dec 2020 18:45 Dromuna Fiji  0.3
15 Dec 2020 09:45 Nadi Fiji  0.3
15 Dec 2020 03:45 Maketu New Zealand  0.2
15 Dec 2020 03:45 Maniatutu New Zealand  0.2
15 Dec 2020 10:45 Namboutini Fiji  0.2
16 Dec 2020 08:30 Nanduri Fiji  0.2
16 Dec 2020 08:30 Vatutandova Fiji  0.2
16 Dec 2020 08:30 Nasea Fiji  0.2
14 Dec 2020 17:15 Ndenimanu Fiji  0.2
15 Dec 2020 06:00 Pukehina New Zealand  0.2
15 Dec 2020 06:00 Ohinepanea New Zealand  0.2
15 Dec 2020 06:00 Otamarakau New Zealand  0.2
15 Dec 2020 06:00 Pikowai New Zealand  0.2
15 Dec 2020 20:00 Nacula Fiji  0.2
15 Dec 2020 20:00 Navotua Fiji  0.2
15 Dec 2020 20:00 Tamusua Fiji  0.2
15 Dec 2020 10:30 Opoutere New Zealand  0.2
15 Dec 2020 10:30 Whangamata New Zealand  0.2
14 Dec 2020 17:30 Ndalomo Fiji  0.2
15 Dec 2020 09:30 Teci Fiji  0.2
15 Dec 2020 09:30 Mbukama Fiji  0.2
15 Dec 2020 09:30 Yasawairara Fiji  0.2
15 Dec 2020 09:45 Momi 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
15 Dec 2020 09:45 Vunisea Fiji  0.2
15 Dec 2020 09:45 Mburelevu Fiji  0.2
15 Dec 2020 09:45 Mokoisa Fiji  0.2
15 Dec 2020 09:45 Naikorokoro Fiji  0.2
15 Dec 2020 09:45 Namara Fiji  0.2
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
16 Dec 2020 05:00 Matata New Zealand  0.2
16 Dec 2020 05:00 Awakaponga New Zealand  0.2
16 Dec 2020 11:45 Tawake Fiji  0.2
15 Dec 2020 08:00 Tairua New Zealand  0.2
15 Dec 2020 08:00 Pauanui New Zealand  0.2
15 Dec 2020 08:45 Vangai Fiji  0.2
16 Dec 2020 20:45 Namukalau Fiji  0.2
16 Dec 2020 18:45 Nakondu Fiji  0.2
16 Dec 2020 18:45 Nathamaki Fiji  0.2
16 Dec 2020 18:45 Nasau Fiji  0.2
15 Dec 2020 09:30 Naruwai Fiji  0.2
16 Dec 2020 19:15 Galoa Fiji  0.2
16 Dec 2020 19:15 Yanutha Fiji  0.2
16 Dec 2020 19:15 Matavuralevu Fiji  0.2
16 Dec 2020 19:15 Pacific Harbour Fiji  0.2
16 Dec 2020 19:15 Waisomo Fiji  0.2
16 Dec 2020 19:15 Dakuimbeqa Fiji  0.2
16 Dec 2020 19:15 Lalati Fiji  0.2
16 Dec 2020 19:15 Navua Fiji  0.2
16 Dec 2020 19:15 Naitionitoni Fiji  0.2
16 Dec 2020 19:15 Mau Fiji  0.2
15 Dec 2020 08:30 Waihi Beach New Zealand  0.2
15 Dec 2020 08:30 Athenree New Zealand  0.2
16 Dec 2020 18:30 Sawaieke Fiji  0.2
16 Dec 2020 18:30 Vione Fiji  0.2
16 Dec 2020 18:30 Dalice Fiji  0.2
16 Dec 2020 18:45 Makongai Fiji  0.2
16 Dec 2020 20:00 Sumi Fiji  0.2
16 Dec 2020 20:00 Elsee Fiji  0.2
16 Dec 2020 04:45 Thornton New Zealand  0.2
16 Dec 2020 04:45 Poroporo New Zealand  0.2
16 Dec 2020 04:45 Whakatane New Zealand  0.2
15 Dec 2020 07:00 Te Puia New Zealand  0.2
15 Dec 2020 07:00 Te Puia Springs New Zealand  0.2
15 Dec 2020 07:00 Tokomaru Bay New Zealand  0.2
15 Dec 2020 07:00 Waipiro New Zealand  0.2
15 Dec 2020 07:00 Waipiro Bay New Zealand  0.2
15 Dec 2020 07:00 Whareponga New Zealand  0.2
15 Dec 2020 07:00 Tuparoa New Zealand  0.2
16 Dec 2020 18:45 Korovou Fiji  0.2
16 Dec 2020 18:45 Navakawau Fiji  0.2
16 Dec 2020 18:45 Korovisilou Fiji  0.2
16 Dec 2020 19:00 Laucala Fiji  0.2
16 Dec 2020 19:30 Nukusa Fiji  0.2
16 Dec 2020 19:30 Nambouono Fiji  0.2
16 Dec 2020 19:15 Kalokolevu Fiji  0.2
16 Dec 2020 19:00 Keteira Fiji  0.2
16 Dec 2020 18:45 Lomawal Fiji  0.2
16 Dec 2020 18:30 Vandravandra Fiji  0.2
16 Dec 2020 18:45 Mbatiri Fiji  0.2
16 Dec 2020 18:30 Suva Fiji  0.2
16 Dec 2020 18:30 Tamavua Fiji  0.2
16 Dec 2020 18:30 Lauthala Bay Fiji  0.2
16 Dec 2020 18:45 Taunovo Fiji  0.2
16 Dec 2020 18:45 Bouwanga Fiji  0.2
16 Dec 2020 18:45 Korolevu Fiji  0.1
16 Dec 2020 18:45 Cuvu Fiji  0.1
16 Dec 2020 18:45 Sigatoka Fiji  0.1
16 Dec 2020 18:45 Laselase Fiji  0.1
16 Dec 2020 18:45 Vatukarasa Fiji  0.1
16 Dec 2020 18:45 Andako Fiji  0.1
15 Dec 2020 01:45 Lakina Tuvalu  0.1
15 Dec 2020 01:30 Tonga Tuvalu  0.1
16 Dec 2020 10:00 Vaitupu Tuvalu  0.1
14 Dec 2020 21:15 Port Awanui New Zealand  0.1
14 Dec 2020 21:15 Rangitukia New Zealand  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 04:45 Lower Waiawa New Zealand  0.1
16 Dec 2020 04:45 Torere New Zealand  0.1
16 Dec 2020 04:45 Houpoto New Zealand  0.1
16 Dec 2020 04:45 Omaio New Zealand  0.1