Overall Green Tropical Cyclone alert for LEE-23 in Canada, United States from 05 Sep 2023 15:00 UTC to 06 Sep 2023 03:00 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 LEE-23

in Canada, United States

06 Sep 2023 03 UTC

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Meteorological source:

GDACS NOAA

Impact Single TC

Impact based on all weather systems in the area

Impact

Tropical Cyclone LEE-23 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	GDACS
Exposed countries	Canada, United States
Exposed population	1.1 million in Category 1 or higher
Maximum wind speed	269 km/h
Maximum storm surge	0.2 m (10 Sep 03:00 UTC)
Vulnerability	Low (Canada)

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	241 km/h	0.2 m	n.a.	0.5
Overall	269 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

241 km/h Current Max.

Up to no people in Category 1 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	05 Sep 2023 15:00	222	Few people	No people	Antigua and Barbuda, Anguilla
2	05 Sep 2023 21:00	231	No people	No people
3	06 Sep 2023 03:00	241	No people	No people

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	05 Sep 2023 15:00	Tropical depression	56	no people	no people	12.5, -40.2
2	05 Sep 2023 21:00	Tropical storm	74	no people	no people	13.2, -41.8
3	06 Sep 2023 03:00	Tropical storm	83	no people	no people	13.5, -43
3	06 Sep 2023 12:00	Tropical storm	102	no people	no people	14.1, -44.9
3	07 Sep 2023 00:00	Category 1	120	no people	no people	14.9, -47.2
3	07 Sep 2023 12:00	Category 1	139	no people	no people	15.7, -49.7
3	08 Sep 2023 00:00	Category 2	167	no people	no people	16.6, -52.2
3	08 Sep 2023 12:00	Category 3	194	no people	no people	17.8, -54.8
3	09 Sep 2023 00:00	Category 4	213	no people	no people	18.9, -57.1
3	10 Sep 2023 00:00	Category 4	231	no people	no people	20.8, -61.5
3	11 Sep 2023 00:00	Category 4	241	no people	no people	22.5, -65

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

Critical infrastructure

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

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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 The Settlement, British Virgin Islands. This height is estimated for 10 Sep 2023 03:00 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 (25 locations). Calculation based on advisory number 3 of 06 Sep 2023 03:00:00 UTC. (Simulation using 2 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	10 Sep 2023 03:00	The Settlement	British Virgin Islands	0.2
	10 Sep 2023 03:00	Spanish Town	British Virgin Islands	0.1
	10 Sep 2023 02:00	Codrington	Antigua and Barbuda	0.1
	10 Sep 2023 03:00	Adelphi	Virgin Islands	0.1
	10 Sep 2023 03:00	Neltjeberg	Virgin Islands	0.1
	10 Sep 2023 03:00	Cabritaberg	Virgin Islands	0.1
	10 Sep 2023 03:00	Barrett	Virgin Islands	0.1
	10 Sep 2023 03:00	Charlotte Amalie	Virgin Islands	0.1
	10 Sep 2023 03:00	Enighed	Virgin Islands	0.1
	10 Sep 2023 03:00	Bellevue	Virgin Islands	0.1
	10 Sep 2023 03:00	Mandal	Virgin Islands	0.1
	10 Sep 2023 03:00	Bolongo	Virgin Islands	0.1
	10 Sep 2023 03:00	Donoe	Virgin Islands	0.1
	10 Sep 2023 03:00	Benner	Virgin Islands	0.1
	10 Sep 2023 03:00	Contant	Virgin Islands	0.1
	10 Sep 2023 03:00	Adrian	Virgin Islands	0.1
	10 Sep 2023 03:00	Fish Bay	Virgin Islands	0.1
	10 Sep 2023 03:00	Belle Vue	British Virgin Islands	0.1
	10 Sep 2023 03:00	Annaberg	Virgin Islands	0.1
	10 Sep 2023 03:00	Bordeaux	Virgin Islands	0.1
	10 Sep 2023 03:00	Calabash Boom	Virgin Islands	0.1
	10 Sep 2023 03:00	Hermitage	Virgin Islands	0.1
	10 Sep 2023 03:00	East End	Virgin Islands	0.1
	10 Sep 2023 03:00	Road Town	British Virgin Islands	0.1
	10 Sep 2023 03:00	Pacham Town	British Virgin Islands	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.