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 HWRF
Exposed countries
Exposed population No people in Category 1 or higher
Maximum wind speed 104 km/h
Maximum storm surge 1.5 m (17 Dec 03:45 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 104 km/h 1.5 m 29 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)

Wind

112 km/h

No people by wind speeds of Tropical Storm strength or above



Wind exposed population

No exposed population (in Tropical Storm or higher) based on the bulletin of 16 Dec 2020 06:00 UTC

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 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 00:00 112 -
- - - - - Tonga
GREEN 8 15 Dec 2020 06:00 86 -
- - - - - Tonga
GREEN 9 15 Dec 2020 12:00 90 -
- - - - - Niue
GREEN 10 15 Dec 2020 18:00 94 -
- - - - - Niue
GREEN 11 16 Dec 2020 00:00 112 -
- - - - - Niue
GREEN 12 16 Dec 2020 06:00 137 - - - - - - -




Impact estimation for the next 72h





Rain exposed population

No exposed population (greater than 50mm) based on the bulletin of 16 Dec 2020 06:00 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 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 31 5 thousand - - - - - - Tonga
Blue 8 15 Dec 2020 06:00 24 2 thousand - - - - - - Tonga
Blue 9 15 Dec 2020 12:00 25 1 thousand - - - - - - Niue
Blue 10 15 Dec 2020 18:00 26 1 thousand - - - - - - Niue
Blue 11 16 Dec 2020 00:00 31 1 thousand - - - - - - Niue
Blue 12 16 Dec 2020 06:00 227 - - - - - - -




Impact estimation for the next 72h

StormSurge

1.5 m

The maximum Storm surge height is  1.5m in Natunuka, Fiji. This height is estimated for 17 Dec 2020 03:45 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 06:00 UTC
Alert Date (UTC) Name Country Storm surge height (m)
17 Dec 2020 03:45 Natunuka Fiji  1.5
17 Dec 2020 03:45 Tavua Fiji  1.5
17 Dec 2020 03:45 Rabulu Fiji  1.5
17 Dec 2020 03:45 Togowere Fiji  1.5
17 Dec 2020 03:30 Matacawalevu Fiji  1.1
17 Dec 2020 03:30 Sisili Fiji  1.1
17 Dec 2020 03:30 Nacula Fiji  1.1
17 Dec 2020 03:30 Navotua Fiji  1.1
17 Dec 2020 03:30 Tamusua Fiji  1.1
17 Dec 2020 03:30 Teci Fiji  1.1
17 Dec 2020 03:30 Mbukama Fiji  1.1
17 Dec 2020 03:30 Yasawairara Fiji  1.1
17 Dec 2020 04:00 Nanukuloa Fiji  1.1
17 Dec 2020 04:00 Nasau Fiji  1.1
17 Dec 2020 04:00 Nayavutoka Fiji  1.1
17 Dec 2020 00:15 Soso Fiji  1.1
17 Dec 2020 00:15 Somosomo Fiji  1.1
17 Dec 2020 00:15 Matayalevu Fiji  1.1
17 Dec 2020 04:00 Rakiraki Fiji  1.1
17 Dec 2020 04:00 Vaileka Fiji  1.1
17 Dec 2020 03:30 Nailanga Fiji  1.0
17 Dec 2020 03:30 Sorokoba Fiji  1.0
17 Dec 2020 03:45 Ba Fiji  1.0
17 Dec 2020 03:45 Nalauwaki Fiji  0.9
17 Dec 2020 06:45 Lawaki Fiji  0.9
17 Dec 2020 04:15 Lautoka Fiji  0.9
17 Dec 2020 06:45 Lodoni Fiji  0.8
17 Dec 2020 06:45 Naingani Fiji  0.8
17 Dec 2020 07:00 Kasavu Fiji  0.8
17 Dec 2020 07:00 Nausori Fiji  0.8
17 Dec 2020 07:00 Korovou Fiji  0.8
17 Dec 2020 07:00 Lokia Fiji  0.8
17 Dec 2020 07:00 Naimasimasi Fiji  0.8
17 Dec 2020 07:00 Ucunivanua Fiji  0.8
17 Dec 2020 07:00 Cautata Fiji  0.8
17 Dec 2020 07:00 Nasilai Fiji  0.8
17 Dec 2020 07:00 Dromuna Fiji  0.8
17 Dec 2020 07:00 Navuti Fiji  0.7
17 Dec 2020 07:00 Nasaga Fiji  0.7
17 Dec 2020 07:00 Rukuruku Fiji  0.7
17 Dec 2020 07:00 Lovoni Fiji  0.7
17 Dec 2020 03:15 Koroinasolo Fiji  0.7
17 Dec 2020 03:15 Savu Sau Fiji  0.7
17 Dec 2020 03:15 Navinggiri Fiji  0.7
17 Dec 2020 03:15 Yangganga Fiji  0.7
17 Dec 2020 03:15 Nawailevu Fiji  0.7
17 Dec 2020 04:00 Tavua Fiji  0.7
17 Dec 2020 12:30 Nauouo Fiji  0.6
17 Dec 2020 12:30 Levuka Fiji  0.6
17 Dec 2020 03:45 Ndenimanu Fiji  0.6
17 Dec 2020 05:00 Nadi Fiji  0.6
17 Dec 2020 05:00 Namaka Fiji  0.6
17 Dec 2020 06:30 Navindamu Fiji  0.5
17 Dec 2020 06:30 Nagumu Fiji  0.5
17 Dec 2020 12:30 Galoa Fiji  0.5
17 Dec 2020 12:30 Yanutha Fiji  0.5
17 Dec 2020 12:30 Matavuralevu Fiji  0.5
17 Dec 2020 12:30 Pacific Harbour Fiji  0.5
17 Dec 2020 12:30 Waisomo Fiji  0.5
17 Dec 2020 12:30 Dakuimbeqa Fiji  0.5
17 Dec 2020 12:30 Lalati Fiji  0.5
17 Dec 2020 12:30 Navua Fiji  0.5
17 Dec 2020 12:30 Naitionitoni Fiji  0.5
17 Dec 2020 12:30 Mau Fiji  0.5
17 Dec 2020 04:00 Ndalomo Fiji  0.5
17 Dec 2020 08:45 Nanduri Fiji  0.5
17 Dec 2020 08:45 Vatutandova Fiji  0.5
17 Dec 2020 08:45 Nasea Fiji  0.5
17 Dec 2020 13:00 Kalokolevu Fiji  0.5
17 Dec 2020 13:00 Suva Fiji  0.5
17 Dec 2020 13:00 Tamavua Fiji  0.5
17 Dec 2020 13:00 Lauthala Bay Fiji  0.5
17 Dec 2020 13:00 Laucala Fiji  0.5
17 Dec 2020 00:30 Solevu Fiji  0.5
17 Dec 2020 04:00 Naruwai Fiji  0.5
17 Dec 2020 04:00 Nabouwalu Fiji  0.5
17 Dec 2020 03:15 Nasarowangga Fiji  0.5
17 Dec 2020 19:15 Vunisea Fiji  0.4
17 Dec 2020 19:15 Mburelevu Fiji  0.4
17 Dec 2020 19:15 Mokoisa Fiji  0.4
17 Dec 2020 19:15 Naikorokoro Fiji  0.4
17 Dec 2020 19:15 Namara Fiji  0.4
17 Dec 2020 19:15 Gasele Fiji  0.4
17 Dec 2020 19:15 Soso Fiji  0.4
17 Dec 2020 19:15 Kavala Fiji  0.4
17 Dec 2020 19:15 Kaduvu Fiji  0.4
17 Dec 2020 18:45 Nabouwalu Fiji  0.4
17 Dec 2020 18:45 Vabea Fiji  0.4
17 Dec 2020 04:00 Thavanga Fiji  0.4
17 Dec 2020 15:15 Sawaieke Fiji  0.4
18 Dec 2020 01:00 Andako Fiji  0.4
17 Dec 2020 04:45 Momi Fiji  0.4
17 Dec 2020 19:30 Nukuvou Fiji  0.4
17 Dec 2020 15:15 Vione Fiji  0.4
17 Dec 2020 15:15 Dalice Fiji  0.4
17 Dec 2020 11:30 Korovisilou Fiji  0.4
17 Dec 2020 16:00 Vandravandra 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
17 Dec 2020 09:15 Makongai Fiji  0.4
16 Dec 2020 18:00 Lao Fiji  0.4
16 Dec 2020 18:00 Nailou Fiji  0.4
16 Dec 2020 18:00 Nawi Fiji  0.4
16 Dec 2020 18:00 Vunikura Fiji  0.4
16 Dec 2020 18:00 Napuka Fiji  0.4
17 Dec 2020 04:45 Lomawal Fiji  0.4
17 Dec 2020 05:45 Vunivatu Fiji  0.4
17 Dec 2020 05:45 Navukembuli Fiji  0.4
17 Dec 2020 04:45 Mbatiri Fiji  0.3
17 Dec 2020 06:00 Naua Fiji  0.3
17 Dec 2020 06:00 Namukalau Fiji  0.3
17 Dec 2020 07:30 Korolevu Fiji  0.3
17 Dec 2020 07:30 Vatukarasa Fiji  0.3
17 Dec 2020 19:45 Keteira Fiji  0.3
17 Dec 2020 04:15 Ndaria Fiji  0.3
17 Dec 2020 04:15 Rave-rave Fiji  0.3
17 Dec 2020 16:00 Korotasere Fiji  0.3
17 Dec 2020 16:00 Naweni Fiji  0.3
17 Dec 2020 16:00 Viani Fiji  0.3
17 Dec 2020 16:00 Ndrekeniwai Fiji  0.3
17 Dec 2020 16:00 Mbangasau Fiji  0.3
17 Dec 2020 07:00 Cuvu Fiji  0.3
17 Dec 2020 07:00 Sigatoka Fiji  0.3
17 Dec 2020 07:00 Laselase Fiji  0.3
16 Dec 2020 10:00 Ndawara Fiji  0.3
16 Dec 2020 10:00 Waisa Fiji  0.3
17 Dec 2020 05:00 Malake Fiji  0.3
17 Dec 2020 05:00 Biagunu Fiji  0.3
17 Dec 2020 05:00 Namboutini Fiji  0.3
17 Dec 2020 05:00 Nakarambo Fiji  0.3
17 Dec 2020 07:30 Taunovo Fiji  0.3
17 Dec 2020 18:45 Nalotu Fiji  0.3
16 Dec 2020 07:15 Tawake Fiji  0.3
17 Dec 2020 07:30 Bouwanga Fiji  0.3
17 Dec 2020 15:45 Nasau Fiji  0.3
17 Dec 2020 15:45 Talaulia Fiji  0.3
17 Dec 2020 07:15 Nakondu Fiji  0.3
17 Dec 2020 07:15 Nathamaki Fiji  0.3
17 Dec 2020 07:15 Nasau Fiji  0.3
18 Dec 2020 20:15 Te Puia New Zealand  0.3
18 Dec 2020 20:15 Te Puia Springs New Zealand  0.3
18 Dec 2020 20:15 Tokomaru Bay New Zealand  0.3
18 Dec 2020 20:15 Waipiro New Zealand  0.3
18 Dec 2020 20:15 Waipiro Bay New Zealand  0.3
18 Dec 2020 20:15 Whareponga New Zealand  0.3
18 Dec 2020 20:15 Tuparoa New Zealand  0.3
16 Dec 2020 19:30 Vangai Fiji  0.2
17 Dec 2020 04:00 Korovou Fiji  0.2
16 Dec 2020 12:45 Tairua New Zealand  0.2
16 Dec 2020 12:45 Pauanui New Zealand  0.2
16 Dec 2020 12:45 Opoutere New Zealand  0.2
16 Dec 2020 12:45 Whangamata New Zealand  0.2
16 Dec 2020 21:00 Maketu New Zealand  0.2
16 Dec 2020 21:00 Maniatutu New Zealand  0.2
16 Dec 2020 21:00 Pukehina New Zealand  0.2
16 Dec 2020 21:00 Ohinepanea New Zealand  0.2
16 Dec 2020 21:00 Otamarakau New Zealand  0.2
16 Dec 2020 21:00 Pikowai New Zealand  0.2
17 Dec 2020 03:45 Nukusa Fiji  0.2
17 Dec 2020 04:00 Navakawau Fiji  0.2
16 Dec 2020 20:45 Nambouono Fiji  0.2
16 Dec 2020 19:45 Sumi Fiji  0.2
16 Dec 2020 20:00 Elsee Fiji  0.2
17 Dec 2020 13:00 Waihi Beach New Zealand  0.2
17 Dec 2020 13:00 Athenree New Zealand  0.2
16 Dec 2020 07:00 Matata New Zealand  0.2
16 Dec 2020 07:00 Awakaponga New Zealand  0.2
16 Dec 2020 15:30 Thornton New Zealand  0.2
16 Dec 2020 15:30 Poroporo New Zealand  0.2
16 Dec 2020 15:30 Whakatane New Zealand  0.2
17 Dec 2020 13:45 Otumoetai New Zealand  0.2
17 Dec 2020 13:45 Mount Maunganui New Zealand  0.2
17 Dec 2020 13:45 Matapihi New Zealand  0.2
17 Dec 2020 13:45 Kairua New Zealand  0.2
17 Dec 2020 13:45 Papamoa New Zealand  0.2
17 Dec 2020 01:30 Port Awanui New Zealand  0.2
17 Dec 2020 01:30 Rangitukia New Zealand  0.2
17 Dec 2020 01:45 Horoera New Zealand  0.2
17 Dec 2020 01:45 East Cape New Zealand  0.2
16 Dec 2020 12:00 Opotiki New Zealand  0.1
16 Dec 2020 12:00 Lower Waiawa New Zealand  0.1
16 Dec 2020 12:00 Torere New Zealand  0.1
16 Dec 2020 12:00 Houpoto New Zealand  0.1
18 Dec 2020 10:00 Ohope Beach New Zealand  0.1
16 Dec 2020 07:00 Hicks Bay New Zealand  0.1
16 Dec 2020 07:00 Te Araroa New Zealand  0.1
16 Dec 2020 09:45 Lakina Tuvalu  0.1
16 Dec 2020 09:45 Tonga Tuvalu  0.1
18 Dec 2020 04:15 Vaitupu Tuvalu  0.1
16 Dec 2020 18:30 Omaio New Zealand  0.1

Calculation folder at this link