Overall Green alert Tropical Cyclone for ZAZU-20
in Niue, Tonga

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
Exposed population 30 thousand in Category 1 or higher
Maximum wind speed 198 km/h
Maximum storm surge 1.6 m (17 Dec 05:15 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 198 km/h 1.6 m 0 mm 1.5
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)

Wind

198 km/h

Up to 30 thousand in Category 1 strength or higher (see SSHS)



Wind exposed population

Estimations based on the bulletin of 16 Dec 2020 12:00 UTC
CategoryCountryPopulation 
CAT. 3Fiji1206 
CAT. 2Fiji8074 
CAT. 1Fiji24742 
Tropical StormFiji, Tonga293681
+
Fiji210659 
Tonga83022 

See TC classification SSHS


Wind Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert 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 12:00 101 -
- - - - - Niue
GREEN 7 16 Dec 2020 00:00 137 -
- - - - - Niue
ORANGE 8 16 Dec 2020 12:00 198 30 thousand
- - Fiji, Tonga




Impact estimation for the next 72h





Rain exposed population

No exposed population (greater than 50mm) based on the bulletin of 16 Dec 2020 12:00 UTC

Rain Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert 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 28 1 thousand - - - - - - Niue
Blue 7 16 Dec 2020 00:00 38 Few people - - - - - - Niue
Blue 8 16 Dec 2020 12:00 0 - - - - - - -




Impact estimation for the next 72h

StormSurge

1.6 m

The maximum Storm surge height is  1.6m in Navindamu, Fiji. This height is estimated for 17 Dec 2020 05:15 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.

Calculation based on the bulletin of 16 Dec 2020 12:00 UTC
Alert Date (UTC) Name Country Storm surge height (m)
17 Dec 2020 05:15 Navindamu Fiji  1.6
17 Dec 2020 05:15 Nagumu Fiji  1.6
17 Dec 2020 04:15 Koroinasolo Fiji  1.3
17 Dec 2020 04:15 Savu Sau Fiji  1.3
17 Dec 2020 04:15 Navinggiri Fiji  1.3
17 Dec 2020 04:15 Yangganga Fiji  1.3
17 Dec 2020 04:15 Nawailevu Fiji  1.3
17 Dec 2020 08:30 Korosi Fiji  1.2
17 Dec 2020 08:30 Korotasere Fiji  1.2
17 Dec 2020 08:30 Naweni Fiji  1.2
17 Dec 2020 08:30 Viani Fiji  1.2
17 Dec 2020 08:30 Ndrekeniwai Fiji  1.2
17 Dec 2020 08:30 Mbangasau Fiji  1.2
17 Dec 2020 05:45 Nanduri Fiji  1.1
17 Dec 2020 07:45 Vatutandova Fiji  1.0
17 Dec 2020 07:45 Nasea Fiji  1.0
17 Dec 2020 04:45 Nasarowangga Fiji  1.0
17 Dec 2020 07:30 Naindi Fiji  0.8
17 Dec 2020 07:30 Nakarambo Fiji  0.8
17 Dec 2020 07:15 Ndaria Fiji  0.8
17 Dec 2020 07:15 Rave-rave Fiji  0.8
17 Dec 2020 07:15 Ndawara Fiji  0.8
17 Dec 2020 07:15 Waisa Fiji  0.8
17 Dec 2020 07:15 Natua Fiji  0.8
17 Dec 2020 07:15 Mbangata Fiji  0.8
17 Dec 2020 07:15 Savusavu Fiji  0.8
17 Dec 2020 09:15 Nakondu Fiji  0.7
17 Dec 2020 09:15 Nathamaki Fiji  0.7
17 Dec 2020 09:15 Nasau Fiji  0.7
17 Dec 2020 07:30 Thavanga Fiji  0.7
17 Dec 2020 06:15 Nabouwalu Fiji  0.7
17 Dec 2020 08:00 Malake Fiji  0.7
17 Dec 2020 08:00 Biagunu Fiji  0.7
17 Dec 2020 11:00 Navakawau Fiji  0.6
17 Dec 2020 07:00 Vunivatu Fiji  0.6
17 Dec 2020 07:00 Navukembuli Fiji  0.6
17 Dec 2020 07:00 Naua Fiji  0.6
17 Dec 2020 07:00 Namukalau Fiji  0.6
17 Dec 2020 03:15 Ndenimanu Fiji  0.6
17 Dec 2020 10:45 Korovou Fiji  0.6
17 Dec 2020 06:00 Ndalomo Fiji  0.6
17 Dec 2020 09:30 Vangai Fiji  0.5
17 Dec 2020 06:30 Naruwai Fiji  0.5
17 Dec 2020 08:15 Lao Fiji  0.5
17 Dec 2020 08:15 Nailou Fiji  0.5
17 Dec 2020 08:15 Nawi Fiji  0.5
17 Dec 2020 08:00 Vunikura Fiji  0.5
17 Dec 2020 08:00 Napuka Fiji  0.5
17 Dec 2020 09:15 Makongai Fiji  0.5
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 12:15 Dalice Fiji  0.4
17 Dec 2020 08:30 Namboutini Fiji  0.4
17 Dec 2020 05:45 Tawake Fiji  0.4
16 Dec 2020 16:30 Naingani Fiji  0.4
16 Dec 2020 16:30 Navuti Fiji  0.4
16 Dec 2020 16:30 Nasaga Fiji  0.4
16 Dec 2020 16:30 Rukuruku Fiji  0.4
16 Dec 2020 16:30 Lovoni Fiji  0.4
16 Dec 2020 16:30 Nauouo Fiji  0.4
16 Dec 2020 16:30 Levuka Fiji  0.4
17 Dec 2020 02:00 Mbukama Fiji  0.4
17 Dec 2020 02:00 Yasawairara 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 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 01:00 Nacula Fiji  0.4
17 Dec 2020 01:00 Navotua Fiji  0.4
17 Dec 2020 01:00 Tamusua Fiji  0.4
17 Dec 2020 01:00 Teci Fiji  0.4
17 Dec 2020 10:15 Lawaki Fiji  0.4
16 Dec 2020 16:30 Nailanga Fiji  0.4
16 Dec 2020 16:30 Sorokoba Fiji  0.4
16 Dec 2020 16:30 Ba Fiji  0.4
17 Dec 2020 02:00 Namaka Fiji  0.4
17 Dec 2020 02:00 Lautoka Fiji  0.4
17 Dec 2020 16:30 Gasele Fiji  0.4
17 Dec 2020 16:30 Soso Fiji  0.4
17 Dec 2020 16:30 Kavala Fiji  0.4
17 Dec 2020 16:30 Kaduvu Fiji  0.4
17 Dec 2020 16:30 Nukuvou Fiji  0.4
17 Dec 2020 16:30 Nabouwalu Fiji  0.4
17 Dec 2020 16:30 Vabea Fiji  0.4
16 Dec 2020 16:30 Solevu Fiji  0.4
17 Dec 2020 17:45 Keteira Fiji  0.4
19 Dec 2020 10:15 Korovou Fiji  0.3
19 Dec 2020 10:15 Lodoni Fiji  0.3
17 Dec 2020 03:15 Vunisea Fiji  0.3
17 Dec 2020 03:15 Mburelevu Fiji  0.3
17 Dec 2020 03:15 Mokoisa Fiji  0.3
17 Dec 2020 03:15 Naikorokoro Fiji  0.3
17 Dec 2020 03:15 Namara Fiji  0.3
17 Dec 2020 06:15 Rakiraki Fiji  0.3
17 Dec 2020 06:15 Vaileka Fiji  0.3
17 Dec 2020 02:15 Nalauwaki Fiji  0.3
17 Dec 2020 02:15 Tavua Fiji  0.3
17 Dec 2020 10:00 Kasavu Fiji  0.3
17 Dec 2020 10:00 Nausori Fiji  0.3
17 Dec 2020 10:00 Naimasimasi Fiji  0.3
17 Dec 2020 10:00 Ucunivanua Fiji  0.3
17 Dec 2020 10:00 Cautata Fiji  0.3
17 Dec 2020 10:00 Dromuna Fiji  0.3
17 Dec 2020 13:00 Sawaieke Fiji  0.3
17 Dec 2020 13:00 Vione Fiji  0.3
17 Dec 2020 06:15 Nukusa Fiji  0.3
17 Dec 2020 06:15 Nambouono Fiji  0.3
17 Dec 2020 13:00 Vandravandra Fiji  0.3
16 Dec 2020 19:00 Te Puia New Zealand  0.3
16 Dec 2020 19:00 Te Puia Springs New Zealand  0.3
16 Dec 2020 19:00 Tokomaru Bay New Zealand  0.3
16 Dec 2020 19:00 Waipiro New Zealand  0.3
16 Dec 2020 19:00 Waipiro Bay New Zealand  0.3
16 Dec 2020 19:00 Whareponga New Zealand  0.3
16 Dec 2020 19:00 Tuparoa New Zealand  0.3
17 Dec 2020 03:30 Lokia Fiji  0.3
17 Dec 2020 03:30 Nasilai Fiji  0.3
17 Dec 2020 02:30 Momi Fiji  0.3
17 Dec 2020 02:30 Nadi Fiji  0.3
17 Dec 2020 13:45 Galoa Fiji  0.3
17 Dec 2020 13:45 Yanutha Fiji  0.3
17 Dec 2020 13:45 Matavuralevu Fiji  0.3
17 Dec 2020 13:45 Pacific Harbour Fiji  0.3
17 Dec 2020 13:45 Waisomo Fiji  0.3
17 Dec 2020 13:45 Dakuimbeqa Fiji  0.3
17 Dec 2020 13:45 Lalati Fiji  0.3
17 Dec 2020 13:45 Navua Fiji  0.3
17 Dec 2020 13:45 Naitionitoni Fiji  0.3
17 Dec 2020 13:45 Mau Fiji  0.3
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
16 Dec 2020 12:15 Maketu New Zealand  0.2
16 Dec 2020 12:15 Maniatutu New Zealand  0.2
16 Dec 2020 12:15 Pukehina New Zealand  0.2
16 Dec 2020 12:15 Ohinepanea New Zealand  0.2
16 Dec 2020 12:15 Otamarakau New Zealand  0.2
16 Dec 2020 12:15 Pikowai New Zealand  0.2
17 Dec 2020 20:45 Matata New Zealand  0.2
17 Dec 2020 20:45 Awakaponga New Zealand  0.2
17 Dec 2020 00:45 Tairua New Zealand  0.2
17 Dec 2020 00:45 Pauanui New Zealand  0.2
17 Dec 2020 00:45 Opoutere New Zealand  0.2
17 Dec 2020 00:45 Whangamata New Zealand  0.2
17 Dec 2020 18:45 Andako Fiji  0.2
17 Dec 2020 01:45 Lomawal Fiji  0.2
17 Dec 2020 01:45 Mbatiri Fiji  0.2
18 Dec 2020 09:15 Otumoetai New Zealand  0.2
18 Dec 2020 09:15 Mount Maunganui New Zealand  0.2
18 Dec 2020 09:15 Matapihi New Zealand  0.2
18 Dec 2020 09:15 Kairua New Zealand  0.2
18 Dec 2020 09:15 Papamoa New Zealand  0.2
17 Dec 2020 02:45 Kalokolevu Fiji  0.2
17 Dec 2020 02:45 Suva Fiji  0.2
17 Dec 2020 02:45 Tamavua Fiji  0.2
17 Dec 2020 02:45 Lauthala Bay Fiji  0.2
17 Dec 2020 02:45 Korovisilou Fiji  0.2
17 Dec 2020 02:45 Laucala Fiji  0.2
16 Dec 2020 12:00 Waihi Beach New Zealand  0.2
16 Dec 2020 12:00 Athenree New Zealand  0.2
17 Dec 2020 02:15 Cuvu Fiji  0.2
17 Dec 2020 02:15 Sigatoka Fiji  0.2
17 Dec 2020 02:15 Laselase Fiji  0.2
16 Dec 2020 23:45 Port Awanui New Zealand  0.2
16 Dec 2020 23:45 Rangitukia New Zealand  0.2
17 Dec 2020 02:30 Vatukarasa Fiji  0.2
17 Dec 2020 02:30 Korolevu Fiji  0.2
19 Dec 2020 01:30 Lakina Tuvalu  0.2
17 Dec 2020 02:30 Bouwanga Fiji  0.2
17 Dec 2020 02:30 Taunovo Fiji  0.2
16 Dec 2020 18:00 Elsee Fiji  0.2
16 Dec 2020 18:00 Sumi Fiji  0.2
19 Dec 2020 01:30 Tonga Tuvalu  0.2
19 Dec 2020 01:30 Vaitupu Tuvalu  0.2
17 Dec 2020 10:30 Thornton New Zealand  0.2
16 Dec 2020 17:15 Hicks Bay New Zealand  0.1
16 Dec 2020 17:15 Te Araroa New Zealand  0.1
16 Dec 2020 17:15 Horoera New Zealand  0.1
19 Dec 2020 10:00 Opotiki New Zealand  0.1
19 Dec 2020 10:00 Lower Waiawa New Zealand  0.1
19 Dec 2020 10:00 Torere New Zealand  0.1
19 Dec 2020 10:00 Houpoto New Zealand  0.1
18 Dec 2020 09:00 East Cape New Zealand  0.1
18 Dec 2020 19:00 Raukokore New Zealand  0.1
18 Dec 2020 19:00 Waihau Bay New Zealand  0.1
18 Dec 2020 19:00 Cape Runaway New Zealand  0.1
18 Dec 2020 19:00 Whangaparaoa New Zealand  0.1
17 Dec 2020 00:00 Poroporo New Zealand  0.1
17 Dec 2020 00:00 Whakatane New Zealand  0.1
17 Dec 2020 00:00 Ohope Beach New Zealand  0.1
17 Dec 2020 00:00 Waiotahi New Zealand  0.1

Calculation folder at this link