Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga
13 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 97 km/h
Maximum storm surge 0.6 m (15 Dec 20:15 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
HWRF Current 97 km/h 0.6 m 27 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 1 thousand can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 13 Dec 2020 12:00 UTC
CategoryCountryPopulation 
Tropical StormTonga, Niue1,368
+
Tonga424 
Niue944 

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 12:00 148 -
- - - - - Tonga, Niue
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 13 Dec 2020 12:00 UTC
LevelCountryPopulation 
250-500 mmTonga4,774 
100-250 mmTonga10,640 
50-100 mmTonga, Niue254
+
Tonga31 
Niue223 

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 12:00 552 20 thousand
- - - 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 20:15 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 13 Dec 2020 12:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
15 Dec 2020 20:15 Lautoka Fiji  0.6
15 Dec 2020 20:15 Nailanga Fiji  0.6
15 Dec 2020 20:15 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 20:15 Natunuka Fiji  0.5
15 Dec 2020 20:15 Tavua Fiji  0.5
15 Dec 2020 12:15 Koroinasolo Fiji  0.4
15 Dec 2020 12:15 Savu Sau Fiji  0.4
15 Dec 2020 12:15 Navinggiri Fiji  0.4
15 Dec 2020 12:15 Yangganga Fiji  0.4
15 Dec 2020 12:15 Nawailevu Fiji  0.4
14 Dec 2020 03:30 Korovou Fiji  0.4
14 Dec 2020 03:30 Lodoni Fiji  0.4
14 Dec 2020 03:30 Lawaki Fiji  0.4
14 Dec 2020 03:30 Naingani Fiji  0.4
14 Dec 2020 03:30 Navuti Fiji  0.4
14 Dec 2020 03:30 Nasaga Fiji  0.4
14 Dec 2020 03:30 Rukuruku Fiji  0.4
14 Dec 2020 03:30 Lovoni Fiji  0.4
14 Dec 2020 03:30 Ucunivanua Fiji  0.4
15 Dec 2020 20:00 Solevu Fiji  0.4
15 Dec 2020 20:00 Soso Fiji  0.4
15 Dec 2020 20:00 Somosomo Fiji  0.4
14 Dec 2020 02:00 Rabulu Fiji  0.4
14 Dec 2020 02:00 Togowere Fiji  0.4
15 Dec 2020 20:00 Nalauwaki Fiji  0.3
15 Dec 2020 20:00 Tavua Fiji  0.3
15 Dec 2020 20:15 Matayalevu Fiji  0.3
16 Dec 2020 01:15 Korosi Fiji  0.3
16 Dec 2020 01:15 Korotasere Fiji  0.3
16 Dec 2020 01:15 Naweni Fiji  0.3
16 Dec 2020 01:15 Viani Fiji  0.3
16 Dec 2020 01:15 Ndrekeniwai Fiji  0.3
16 Dec 2020 01:15 Mbangasau Fiji  0.3
16 Dec 2020 01:30 Naindi Fiji  0.3
16 Dec 2020 01:30 Nakarambo Fiji  0.3
15 Dec 2020 20:00 Matacawalevu Fiji  0.3
15 Dec 2020 20:00 Sisili Fiji  0.3
14 Dec 2020 01:00 Nauouo Fiji  0.3
14 Dec 2020 01:00 Levuka Fiji  0.3
15 Dec 2020 19:00 Natua Fiji  0.3
15 Dec 2020 19:00 Mbangata Fiji  0.3
15 Dec 2020 19:00 Savusavu Fiji  0.3
16 Dec 2020 01:30 Malake Fiji  0.3
16 Dec 2020 01:30 Biagunu Fiji  0.3
15 Dec 2020 10:00 Lao Fiji  0.3
15 Dec 2020 10:00 Nailou Fiji  0.3
15 Dec 2020 10:00 Nawi 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
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 01:00 Kasavu Fiji  0.3
14 Dec 2020 01:00 Naimasimasi Fiji  0.3
15 Dec 2020 09:45 Nasau Fiji  0.3
15 Dec 2020 09:45 Nayavutoka Fiji  0.3
14 Dec 2020 17:30 Navindamu Fiji  0.2
14 Dec 2020 17:30 Nagumu Fiji  0.2
14 Dec 2020 17:15 Nacula Fiji  0.2
14 Dec 2020 17:15 Navotua Fiji  0.2
14 Dec 2020 17:15 Tamusua Fiji  0.2
14 Dec 2020 17:15 Teci Fiji  0.2
14 Dec 2020 17:15 Mbukama Fiji  0.2
14 Dec 2020 17:15 Yasawairara Fiji  0.2
15 Dec 2020 12:00 Nasarowangga Fiji  0.2
14 Dec 2020 17:45 Nanduri Fiji  0.2
14 Dec 2020 17:45 Vatutandova Fiji  0.2
14 Dec 2020 17:45 Nasea Fiji  0.2
14 Dec 2020 18:15 Maketu New Zealand  0.2
14 Dec 2020 18:15 Maniatutu New Zealand  0.2
14 Dec 2020 18:15 Pukehina New Zealand  0.2
14 Dec 2020 18:15 Ohinepanea New Zealand  0.2
14 Dec 2020 18:15 Otamarakau New Zealand  0.2
14 Dec 2020 18:15 Pikowai New Zealand  0.2
15 Dec 2020 08:15 Vunikura Fiji  0.2
15 Dec 2020 08:15 Napuka Fiji  0.2
15 Dec 2020 09:30 Nadi Fiji  0.2
15 Dec 2020 09:15 Ndenimanu Fiji  0.2
15 Dec 2020 09:15 Ndalomo Fiji  0.2
15 Dec 2020 19:00 Nabouwalu Fiji  0.2
15 Dec 2020 19:00 Thavanga Fiji  0.2
15 Dec 2020 19:00 Ndaria Fiji  0.2
15 Dec 2020 19:00 Rave-rave Fiji  0.2
15 Dec 2020 03:45 Namboutini Fiji  0.2
15 Dec 2020 09:00 Ndawara Fiji  0.2
15 Dec 2020 09:00 Waisa Fiji  0.2
15 Dec 2020 09:30 Momi Fiji  0.2
15 Dec 2020 09:00 Gasele Fiji  0.2
15 Dec 2020 09:00 Soso Fiji  0.2
15 Dec 2020 09:00 Kavala Fiji  0.2
15 Dec 2020 09:00 Kaduvu Fiji  0.2
15 Dec 2020 09:00 Nukuvou Fiji  0.2
15 Dec 2020 09:00 Nabouwalu Fiji  0.2
15 Dec 2020 09:00 Vabea Fiji  0.2
15 Dec 2020 09:30 Naruwai Fiji  0.2
15 Dec 2020 10:00 Vunisea Fiji  0.2
15 Dec 2020 10:00 Mburelevu Fiji  0.2
15 Dec 2020 10:00 Mokoisa Fiji  0.2
15 Dec 2020 10:00 Naikorokoro Fiji  0.2
15 Dec 2020 10:00 Namara Fiji  0.2
16 Dec 2020 11:45 Naua Fiji  0.2
16 Dec 2020 11:45 Tawake Fiji  0.2
15 Dec 2020 09:45 Vangai Fiji  0.2
15 Dec 2020 09:30 Lokia Fiji  0.2
15 Dec 2020 09:30 Cautata Fiji  0.2
15 Dec 2020 09:30 Nasilai Fiji  0.2
15 Dec 2020 09:30 Dromuna Fiji  0.2
15 Dec 2020 10:00 Nausori 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 04:15 Opoutere New Zealand  0.2
16 Dec 2020 04:15 Whangamata New Zealand  0.2
14 Dec 2020 00:45 Galoa Fiji  0.2
14 Dec 2020 00:45 Yanutha Fiji  0.2
14 Dec 2020 00:45 Matavuralevu Fiji  0.2
14 Dec 2020 00:45 Pacific Harbour Fiji  0.2
14 Dec 2020 00:45 Waisomo Fiji  0.2
14 Dec 2020 00:45 Dakuimbeqa Fiji  0.2
14 Dec 2020 00:45 Lalati Fiji  0.2
14 Dec 2020 00:45 Navua Fiji  0.2
14 Dec 2020 00:45 Naitionitoni Fiji  0.2
14 Dec 2020 00:45 Mau Fiji  0.2
14 Dec 2020 16:45 Vunivatu Fiji  0.2
14 Dec 2020 16:45 Navukembuli Fiji  0.2
14 Dec 2020 16:45 Namukalau Fiji  0.2
15 Dec 2020 10:00 Korovou Fiji  0.2
15 Dec 2020 09:45 Nakondu Fiji  0.2
15 Dec 2020 09:45 Nathamaki Fiji  0.2
15 Dec 2020 09:45 Nasau Fiji  0.2
15 Dec 2020 09:30 Makongai Fiji  0.2
16 Dec 2020 11:30 Nukusa Fiji  0.2
16 Dec 2020 11:30 Nambouono Fiji  0.2
15 Dec 2020 09:45 Vione Fiji  0.2
15 Dec 2020 09:45 Dalice Fiji  0.2
15 Dec 2020 09:45 Korovisilou Fiji  0.1
15 Dec 2020 10:00 Navakawau Fiji  0.1
15 Dec 2020 09:45 Sawaieke Fiji  0.1
15 Dec 2020 11:30 Elsee Fiji  0.1
15 Dec 2020 11:30 Sumi Fiji  0.1
15 Dec 2020 09:30 Kalokolevu Fiji  0.1
15 Dec 2020 01:30 Lakina Tuvalu  0.1
15 Dec 2020 01:30 Tonga Tuvalu  0.1
15 Dec 2020 09:30 Laucala Fiji  0.1
15 Dec 2020 09:30 Bouwanga Fiji  0.1
15 Dec 2020 09:30 Taunovo Fiji  0.1
15 Dec 2020 10:00 Vandravandra Fiji  0.1
15 Dec 2020 10:00 Keteira Fiji  0.1
16 Dec 2020 09:45 Vaitupu Tuvalu  0.1
15 Dec 2020 09:30 Suva Fiji  0.1
15 Dec 2020 09:30 Tamavua Fiji  0.1
15 Dec 2020 09:30 Lauthala Bay Fiji  0.1
15 Dec 2020 09:30 Cuvu Fiji  0.1
15 Dec 2020 09:30 Sigatoka Fiji  0.1
15 Dec 2020 09:30 Laselase Fiji  0.1
15 Dec 2020 09:30 Vatukarasa Fiji  0.1
15 Dec 2020 09:30 Korolevu Fiji  0.1
15 Dec 2020 09:45 Lomawal Fiji  0.1
15 Dec 2020 09:45 Mbatiri Fiji  0.1
15 Dec 2020 09:45 Andako Fiji  0.1
15 Dec 2020 07:00 Te Puia New Zealand  0.1
15 Dec 2020 07:00 Te Puia Springs New Zealand  0.1
15 Dec 2020 07:00 Tokomaru Bay New Zealand  0.1
15 Dec 2020 07:00 Waipiro New Zealand  0.1
15 Dec 2020 07:00 Waipiro Bay New Zealand  0.1
15 Dec 2020 07:00 Whareponga New Zealand  0.1
15 Dec 2020 07:00 Tuparoa New Zealand  0.1
16 Dec 2020 04:00 Matata New Zealand  0.1
16 Dec 2020 04:00 Awakaponga New Zealand  0.1
14 Dec 2020 09:15 Thornton New Zealand  0.1
14 Dec 2020 09:15 Poroporo New Zealand  0.1
14 Dec 2020 09:15 Whakatane New Zealand  0.1
14 Dec 2020 09:00 Tairua New Zealand  0.1
14 Dec 2020 09:00 Pauanui New Zealand  0.1