Overall Green Tropical Cyclone alert for OSAI-24 in Cook Islands from 06 Feb 2024 18:00 UTC to 08 Feb 2024 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 OSAI-24

in Cook Islands

08 Feb 2024 12 UTC

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Meteorological source:

GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

Tropical Cyclone OSAI-24 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	GDACS
Exposed countries	Cook Islands
Exposed population	No people in Category 1 or higher
Maximum wind speed	93 km/h
Maximum storm surge	0.2 m (06 Feb 23:00 UTC)
Vulnerability	Medium (Cook Is.)

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
Current	56 km/h	0.2 m	n.a.	0.5
Overall	93 km/h	0.2 m	n.a.	0.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track) based on GDACS impact

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Wind

56 km/h Current Max.

Up to 1200 people in Tropical Storm strength or higher (see SSHS)

Impact Timeline

N°	Date (UTC)	Max Winds (km/h)	Population in Tropical Storm or higher	Population in Cat 1. or higher	Countries
1	06 Feb 2024 18:00	74	No people	No people
2	07 Feb 2024 00:00	74	1 thousand	No people
3	07 Feb 2024 06:00	74	1 thousand	No people	Cook Islands
4	07 Feb 2024 12:00	83	1 thousand	No people	Cook Islands
5	07 Feb 2024 18:00	93	1 thousand	No people	Cook Islands
6	08 Feb 2024 00:00	83	1 thousand	No people	Cook Islands
7	08 Feb 2024 12:00	56	1 thousand	No people	Cook Islands

Bulletin Timeline

N°	Date (UTC)	Category (SSHS)	Max winds (km/h)	Population in Cat.1 or higher	Population in Tropical Storm or higher	Location (lat, lon)
1	06 Feb 2024 18:00	Tropical depression	56	no people	1100 people	-12.7, -170.5
2	07 Feb 2024 00:00	Tropical storm	65	no people	1100 people	-14.2, -168.7
3	07 Feb 2024 06:00	Tropical storm	74	no people	no people	-15.6, -166.8
4	07 Feb 2024 12:00	Tropical storm	83	no people	<1000 people	-16.5, -165.6
5	07 Feb 2024 18:00	Tropical storm	93	no people	no people	-17.8, -164.6
6	08 Feb 2024 00:00	Tropical storm	83	no people	<1000 people	-17.6, -164.7
7	08 Feb 2024 12:00	Tropical depression	56	no people	no people	-18.2, -163.4
7	09 Feb 2024 00:00	Tropical depression	56	no people	no people	-18.7, -163

Actual track of the current bulletin

The alert for forecast greater than 3 days is limited to Orange level.

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Exposed population - AoIs

Exposed population in the potential affected countries, provinces and populated places

Countries

Country	Population in Tropical Storm or higher strength

Provinces

Region Province	Country	Population in Tropical Storm or higher strength

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name	IATA Code	Elevation (m)
Fitiuta	FTI	34
Tau	TAV	56
Ofu	OFU	3

Ports

Name	LOCODE	Country
Manua Island		American Samoa

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Rainfall

Rainfall accumulation of the past 24h, as detected by the Global Precipitation Measurement mission of NASA. For more information, see https://www.nasa.gov/mission_pages/GPM/main/index.html.

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StormSurge

0.2 m

The maximum Storm surge height is 0.2m in Faga, American Samoa. This height is estimated for 06 Feb 2024 23:00 UTC .

The JRC has developed an experimental global storm surge model. 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.

Locations affected by Storm surge (18 locations). Calculation based on advisory number 6 of 08 Feb 2024 00:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	06 Feb 2024 23:00	Faga	American Samoa	0.2
	06 Feb 2024 23:00	Maia	American Samoa	0.2
	06 Feb 2024 23:00	Leusoalii	American Samoa	0.2
	06 Feb 2024 22:00	Alaufau	American Samoa	0.2
	06 Feb 2024 22:00	Lalomoana	American Samoa	0.2
	06 Feb 2024 22:00	Olosega	American Samoa	0.2
	06 Feb 2024 23:00	Tau	American Samoa	0.2
	06 Feb 2024 23:00	Faleasau	American Samoa	0.2
	06 Feb 2024 23:00	Masefau	American Samoa	0.1
	06 Feb 2024 23:00	Auto	American Samoa	0.1
	06 Feb 2024 23:00	Fagaitua	American Samoa	0.1
	06 Feb 2024 23:00	Alofau	American Samoa	0.1
	06 Feb 2024 23:00	Aoa	American Samoa	0.1
	06 Feb 2024 23:00	Amouli	American Samoa	0.1
	06 Feb 2024 23:00	Onenoa	American Samoa	0.1
	06 Feb 2024 23:00	Alao	American Samoa	0.1
	06 Feb 2024 23:00	Tula	American Samoa	0.1
	06 Feb 2024 23:00	Aunuu	American Samoa	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.