Overall Green Tropical Cyclone alert for ZAZU-20 in Niue, Tonga from 13 Dec 2020 12:00 UTC to 16 Dec 2020 06:00 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

Overall Green alert Tropical Cyclone for ZAZU-20

in Niue, Tonga

16 Dec 2020 12 UTC

click on

to select bulletin time

Meteorological source:

GDACS JTWC

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	GFS
Exposed countries	Fiji
Exposed population	80 thousand in Category 1 or higher
Maximum wind speed	191 km/h
Maximum storm surge	1.0 m (17 Dec 07:15 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
GFS Current	191 km/h	1.0 m	53 mm	0.5
GFS Overall	281 km/h	1.1 m	672 mm	1.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

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Wind

281 km/h

Up to 80 thousand in Category 1 strength or higher (see SSHS)

Wind exposed population - AoIs

Estimations based on the bulletin of 16 Dec 2020 12:00 UTC

Category	Country	Population
CAT. 3	Fiji	19
CAT. 2	Fiji	18,315
CAT. 1	Fiji	66,458
Tropical Storm	Fiji	762,758

See TC classification SSHS

Wind Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

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
1	13 Dec 2020 12:00	68	-		-	-	-	-	-	Tonga
2	13 Dec 2020 18:00	68	-		-	-	-	-	-	Tonga
3	14 Dec 2020 00:00	79	-	-	-	-	-	-	-
4	14 Dec 2020 06:00	94	-		-	-	-	-	-	Tonga
5	14 Dec 2020 12:00	97	-		-	-	-	-	-	Tonga
6	14 Dec 2020 18:00	90	-		-	-	-	-	-	Tonga
7	15 Dec 2020 00:00	112	-		-	-	-	-	-	Tonga
8	15 Dec 2020 06:00	112	-		-	-	-	-	-	Niue
9	15 Dec 2020 12:00	97	-		-	-	-	-	-	Niue
10	15 Dec 2020 18:00	104	-		-	-	-	-	-	Niue
11	16 Dec 2020 00:00	122	-		-	-	-	-	-	Niue
12	16 Dec 2020 06:00	173	-		-	-	-	-	-	Fiji
13	16 Dec 2020 12:00	198	80 thousand					-	-	Fiji

Download:

Impact estimation for the next 72h

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Rainfall

Rain exposed population - AoIs

Estimations based on the bulletin of 16 Dec 2020 12:00 UTC

Level	Country	Population
500-750 mm	Fiji	45
250-500 mm	Fiji	503,282
100-250 mm	Fiji, Tonga	212,987	+
	Fiji	212,984
	Tonga	03
50-100 mm	Tuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga	442,356	+
	Tuvalu	39
	Fiji	186,324
	Wallis and Futuna	15,561
	Samoa	176,268
	American Samoa	41,548
	Tonga	22,616

Rain Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

N°	Date (UTC)	Max Rainfall (mm)	Pop >100mm or higher	50-100	100-250	250-500	500-750	750-1000	>1000	Countries
1	13 Dec 2020 12:00	19	Few people	-	-	-	-	-	-	Tonga
2	13 Dec 2020 18:00	19	Few people	-	-	-	-	-	-	Tonga
3	14 Dec 2020 00:00	22	-	-	-	-	-	-	-
4	14 Dec 2020 06:00	26	20 thousand	-	-	-	-	-	-	Tonga
5	14 Dec 2020 12:00	27	20 thousand	-	-	-	-	-	-	Tonga
6	14 Dec 2020 18:00	25	20 thousand	-	-	-	-	-	-	Tonga
7	15 Dec 2020 00:00	31	20 thousand	-	-	-	-	-	-	Tonga
8	15 Dec 2020 06:00	31	1 thousand	-	-	-	-	-	-	Niue
9	15 Dec 2020 12:00	27	1 thousand	-	-	-	-	-	-	Niue
10	15 Dec 2020 18:00	29	1 thousand	-	-	-	-	-	-	Niue
11	16 Dec 2020 00:00	34	1 thousand	-	-	-	-	-	-	Niue
12	16 Dec 2020 06:00	48	10 thousand	-	-	-	-	-	-	Fiji
13	16 Dec 2020 12:00	501	720 thousand					-	-	Tuvalu, Fiji, Wallis and Futuna, Samoa, American Samoa, Tonga

Impact estimation for the next 72h

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StormSurge

1 m

The maximum Storm surge height is 1.0m in Nanukuloa, Fiji. This height is estimated for 17 Dec 2020 07:15 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 16 Dec 2020 12:00 UTC

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

Disclaimer
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.
The designations employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.