Overall Green Tropical Cyclone alert for FOUR-20 in , Fiji, Vanuatu from 11 Dec 2020 00:00 UTC to 12 Dec 2020 12:00 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 FOUR-20

in , Fiji, Vanuatu

10 Dec 2020 12 UTC

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to select bulletin time

Meteorological source:

GDACS JTWC

Impact Single TC

GFS
HWRF
ECMWF

Impact based on all weather systems in the area

Impact

Tropical Cyclone FOUR-20 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	ECMWF
Exposed countries
Exposed population	No people in Category 1 or higher
Maximum wind speed	83 km/h
Maximum storm surge	0.3 m (10 Dec 22:00 UTC)
Vulnerability	--

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	83 km/h	0.3 m	23 mm	0.5
ECMWF Overall	112 km/h	0.4 m	735 mm	0.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

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Wind

112 km/h

No people by wind speeds of Tropical Storm strength or above

Wind exposed population - AoIs

No exposed population (in Tropical Storm or higher) based on the bulletin of 10 Dec 2020 12:00 UTC

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
	1	10 Dec 2020 12:00	90	-	-	-	-	-	-	-

Download:

Impact estimation for the next 72h

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Rainfall

Rain exposed population - AoIs

Estimations based on the bulletin of 10 Dec 2020 12:00 UTC

Level	Country	Population
250-500 mm	Tokelau	431
100-250 mm	Fiji, New Caledonia	2,931	+
	Fiji	2,566
	New Caledonia	365
50-100 mm	Tuvalu, Samoa, Vanuatu, Fiji, New Caledonia	109,085	+
	Tuvalu	39
	Fiji	22,492
	Samoa	10,652
	Vanuatu	62,447
	New Caledonia	13,455

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
	1	10 Dec 2020 12:00	543	3 thousand				-	-	-	Tokelau, Tuvalu, Fiji, Samoa, Vanuatu, New Caledonia

Impact estimation for the next 72h

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StormSurge

0.3 m

The maximum Storm surge height is 0.3m in Lautoka, Fiji. This height is estimated for 10 Dec 2020 22:00 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 10 Dec 2020 12:00 UTC

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	10 Dec 2020 22:00	Lautoka	Fiji	0.3
	10 Dec 2020 22:00	Nailanga	Fiji	0.3
	10 Dec 2020 22:00	Sorokoba	Fiji	0.3
	10 Dec 2020 22:00	Ba	Fiji	0.3
	10 Dec 2020 22:15	Natunuka	Fiji	0.3
	10 Dec 2020 22:00	Tavua	Fiji	0.3
	10 Dec 2020 22:30	Namaka	Fiji	0.3
	10 Dec 2020 19:30	Naindi	Fiji	0.3
	10 Dec 2020 19:30	Korosi	Fiji	0.3
	10 Dec 2020 19:30	Korotasere	Fiji	0.3
	10 Dec 2020 19:30	Naweni	Fiji	0.3
	10 Dec 2020 19:30	Nakarambo	Fiji	0.3
	10 Dec 2020 19:30	Viani	Fiji	0.3
	10 Dec 2020 22:00	Rabulu	Fiji	0.3
	10 Dec 2020 22:00	Togowere	Fiji	0.3
	10 Dec 2020 23:00	Malake	Fiji	0.3
	10 Dec 2020 23:00	Ndrekeniwai	Fiji	0.3
	10 Dec 2020 23:00	Mbangasau	Fiji	0.3
	10 Dec 2020 23:00	Biagunu	Fiji	0.3
	10 Dec 2020 21:30	Koroinasolo	Fiji	0.2
	10 Dec 2020 21:30	Savu Sau	Fiji	0.2
	10 Dec 2020 21:30	Navinggiri	Fiji	0.2
	10 Dec 2020 21:30	Yangganga	Fiji	0.2
	10 Dec 2020 21:30	Nawailevu	Fiji	0.2
	10 Dec 2020 21:15	Moneo	New Caledonia	0.2
	10 Dec 2020 21:15	Ho	New Caledonia	0.2
	10 Dec 2020 21:15	Meomo	New Caledonia	0.2
	10 Dec 2020 21:15	Houailou	New Caledonia	0.2
	10 Dec 2020 21:15	Ouakaya	New Caledonia	0.2
	10 Dec 2020 21:15	Poro	New Caledonia	0.2
	10 Dec 2020 22:00	Lao	Fiji	0.2
	10 Dec 2020 22:00	Nailou	Fiji	0.2
	10 Dec 2020 22:00	Nawi	Fiji	0.2
	10 Dec 2020 22:00	Vunikura	Fiji	0.2
	10 Dec 2020 22:00	Napuka	Fiji	0.2
	10 Dec 2020 22:00	Soso	Fiji	0.2
	10 Dec 2020 22:00	Somosomo	Fiji	0.2
	10 Dec 2020 22:00	Matayalevu	Fiji	0.2
	10 Dec 2020 22:00	Matacawalevu	Fiji	0.2
	10 Dec 2020 22:00	Sisili	Fiji	0.2
	10 Dec 2020 22:15	Ouanache	New Caledonia	0.2
	10 Dec 2020 22:15	Paola	New Caledonia	0.2
	10 Dec 2020 22:15	Vieux Tuho	New Caledonia	0.2
	10 Dec 2020 22:15	Touho	New Caledonia	0.2
	10 Dec 2020 22:15	Kokengone	New Caledonia	0.2
	10 Dec 2020 23:00	Vangai	Fiji	0.2
	10 Dec 2020 21:00	Vunivatu	Fiji	0.2
	10 Dec 2020 21:00	Navukembuli	Fiji	0.2
	10 Dec 2020 21:00	Naua	Fiji	0.2
	10 Dec 2020 21:00	Namukalau	Fiji	0.2
	10 Dec 2020 20:45	Kasavu	Fiji	0.2
	10 Dec 2020 20:45	Korovou	Fiji	0.2
	10 Dec 2020 20:45	Lodoni	Fiji	0.2
	10 Dec 2020 20:45	Naimasimasi	Fiji	0.2
	10 Dec 2020 20:45	Lawaki	Fiji	0.2
	10 Dec 2020 20:45	Ucunivanua	Fiji	0.2
	10 Dec 2020 20:45	Navuti	Fiji	0.2
	10 Dec 2020 20:45	Nasaga	Fiji	0.2
	10 Dec 2020 20:45	Rukuruku	Fiji	0.2
	10 Dec 2020 20:45	Lovoni	Fiji	0.2
	10 Dec 2020 19:15	Kouaoua	New Caledonia	0.2
	10 Dec 2020 23:45	Takataka	Solomon Islands	0.2
	10 Dec 2020 23:45	Ahia	Solomon Islands	0.2
	10 Dec 2020 22:00	Nalauwaki	Fiji	0.2
	10 Dec 2020 22:30	Solevu	Fiji	0.2
	10 Dec 2020 20:45	Naingani	Fiji	0.2
	10 Dec 2020 21:30	Rakiraki	Fiji	0.1
	10 Dec 2020 21:30	Vaileka	Fiji	0.1
	10 Dec 2020 21:30	Nanukuloa	Fiji	0.1
	10 Dec 2020 18:45	Poum-Plage	New Caledonia	0.1
	10 Dec 2020 18:45	Arama	New Caledonia	0.1
	10 Dec 2020 18:45	Pam	New Caledonia	0.1
	10 Dec 2020 22:15	Tavua	Fiji	0.1
	10 Dec 2020 21:15	Nausori	Fiji	0.1
	10 Dec 2020 21:15	Lokia	Fiji	0.1
	10 Dec 2020 21:15	Cautata	Fiji	0.1
	10 Dec 2020 21:15	Nasilai	Fiji	0.1
	10 Dec 2020 21:15	Dromuna	Fiji	0.1
	10 Dec 2020 21:30	Nasarowangga	Fiji	0.1
	10 Dec 2020 20:45	Nauouo	Fiji	0.1
	10 Dec 2020 20:45	Levuka	Fiji	0.1
	10 Dec 2020 21:30	Gasele	Fiji	0.1
	10 Dec 2020 21:30	Soso	Fiji	0.1
	10 Dec 2020 21:30	Kavala	Fiji	0.1
	10 Dec 2020 21:30	Kaduvu	Fiji	0.1
	10 Dec 2020 21:30	Nukuvou	Fiji	0.1
	10 Dec 2020 21:30	Nabouwalu	Fiji	0.1
	10 Dec 2020 21:30	Vabea	Fiji	0.1
	10 Dec 2020 22:00	Nacula	Fiji	0.1
	10 Dec 2020 22:00	Navotua	Fiji	0.1
	10 Dec 2020 22:00	Tamusua	Fiji	0.1
	10 Dec 2020 21:45	Nasau	Fiji	0.1
	10 Dec 2020 21:45	Ndalomo	Fiji	0.1
	10 Dec 2020 21:45	Teci	Fiji	0.1
	10 Dec 2020 19:00	Lekia	New Caledonia	0.1
	10 Dec 2020 19:00	Fayaoue	New Caledonia	0.1
	10 Dec 2020 19:00	Wadrilla	New Caledonia	0.1
	10 Dec 2020 19:00	Ognahu	New Caledonia	0.1
	10 Dec 2020 19:00	Wegnec St-Joseph	New Caledonia	0.1
	10 Dec 2020 19:00	Teouta	New Caledonia	0.1
	10 Dec 2020 19:00	Ognat	New Caledonia	0.1
	10 Dec 2020 16:45	Malapu	Solomon Islands	0.1
	10 Dec 2020 16:45	Tuo	Solomon Islands	0.1
	10 Dec 2020 16:45	Lomlom	Solomon Islands	0.1
	10 Dec 2020 16:45	Namania	Solomon Islands	0.1
	10 Dec 2020 16:45	Nuali	Solomon Islands	0.1
	10 Dec 2020 16:45	Lipe	Solomon Islands	0.1
	10 Dec 2020 17:15	Pek	Vanuatu	0.1
	10 Dec 2020 17:15	Crepeta	Vanuatu	0.1
	10 Dec 2020 17:15	Ngusui	Vanuatu	0.1
	10 Dec 2020 21:30	Navindamu	Fiji	0.1
	10 Dec 2020 22:15	Namboutini	Fiji	0.1
	10 Dec 2020 22:00	Mbukama	Fiji	0.1
	10 Dec 2020 22:00	Yasawairara	Fiji	0.1
	10 Dec 2020 21:15	Tawake	Fiji	0.1
	10 Dec 2020 17:00	Souleisere	Vanuatu	0.1
	10 Dec 2020 17:00	Piapouria	Vanuatu	0.1
	10 Dec 2020 17:00	Mae	Vanuatu	0.1
	10 Dec 2020 17:00	Tourebiou	Vanuatu	0.1
	10 Dec 2020 17:00	Atsaritibi	Vanuatu	0.1
	10 Dec 2020 17:00	Robertsons	Vanuatu	0.1
	10 Dec 2020 17:00	Terou	Vanuatu	0.1
	10 Dec 2020 17:00	Worovok	Vanuatu	0.1
	10 Dec 2020 17:00	Ladhu	Vanuatu	0.1
	10 Dec 2020 21:45	Ndenimanu	Fiji	0.1
	10 Dec 2020 17:45	Houone	New Caledonia	0.1
	10 Dec 2020 17:45	Tiabet	New Caledonia	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.