Overall Green Tropical Cyclone alert for LEE-23 in Canada, United States from 05 Sep 2023 15:00 UTC to 13 Sep 2023 15:00 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

13 Sep 2023 15 UTC

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to select bulletin time

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	0.1 m (06 Sep 13:00 UTC)
Vulnerability	Low (Canada)
Landfall	between 16 Sep 2023 12:00 - 17 Sep 2023 12:00 in 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	185 km/h	1.2 m	n.a.	0.5
Overall	269 km/h	0.1 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

185 km/h Current Max.

Up to 370000 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
4	06 Sep 2023 09:00	241	No people	No people
5	06 Sep 2023 15:00	241	No people	No people
6	06 Sep 2023 21:00	241	No people	No people
7	07 Sep 2023 03:00	250	No people	No people
8	07 Sep 2023 09:00	250	No people	No people
9	07 Sep 2023 15:00	259	No people	No people
10	07 Sep 2023 21:00	269	No people	No people
11	08 Sep 2023 03:00	287	No people	No people
12	08 Sep 2023 09:00	287	No people	No people
13	08 Sep 2023 15:00	250	No people	No people
14	08 Sep 2023 21:00	241	No people	No people
15	09 Sep 2023 03:00	222	No people	No people
16	09 Sep 2023 09:00	222	No people	No people
17	09 Sep 2023 15:00	222	No people	No people
18	09 Sep 2023 21:00	222	No people	No people
19	10 Sep 2023 03:00	222	No people	No people
20	10 Sep 2023 09:00	213	No people	No people
21	10 Sep 2023 15:00	213	No people	No people
22	10 Sep 2023 21:00	222	60 thousand	No people	Bermuda
23	11 Sep 2023 03:00	222	60 thousand	No people	Bermuda
24	11 Sep 2023 09:00	213	60 thousand	No people	Bermuda
25	11 Sep 2023 15:00	213	60 thousand	No people	Bermuda
26	11 Sep 2023 21:00	194	220 thousand	No people	Bermuda, United States
27	12 Sep 2023 03:00	194	1.3 million	20 thousand	Canada
28	12 Sep 2023 09:00	185	1.9 million	70 thousand	Canada
29	12 Sep 2023 15:00	185	2.3 million	210 thousand	Canada
30	12 Sep 2023 21:00	185	11 million	610 thousand	Canada
31	13 Sep 2023 03:00	185	10.5 million	60 thousand	United States, Canada
32	13 Sep 2023 09:00	185	14.6 million	70 thousand	United States, Canada
33	13 Sep 2023 15:00	185	13.2 million	370 thousand	United States, Canada

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)	Countries
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
4	06 Sep 2023 09:00	Tropical storm	102	no people	no people	13.7, -44.6
5	06 Sep 2023 15:00	Tropical storm	111	no people	no people	14.1, -45.5
6	06 Sep 2023 21:00	Category 1	120	no people	no people	14.9, -46.4
7	07 Sep 2023 03:00	Category 1	130	no people	no people	15.4, -47.7
8	07 Sep 2023 09:00	Category 1	130	no people	no people	16.1, -48.6
9	07 Sep 2023 15:00	Category 2	167	no people	no people	16.4, -50
10	07 Sep 2023 21:00	Category 4	213	no people	no people	16.9, -51.3
11	08 Sep 2023 03:00	Category 5	259	no people	no people	17.3, -52.4
12	08 Sep 2023 09:00	Category 5	269	no people	no people	17.8, -53.5
13	08 Sep 2023 15:00	Category 4	250	no people	no people	18.2, -54.5
14	08 Sep 2023 21:00	Category 4	241	no people	no people	18.9, -55.5
15	09 Sep 2023 03:00	Category 3	185	no people	no people	19.3, -56.5
16	09 Sep 2023 09:00	Category 3	185	no people	no people	19.7, -57.4
17	09 Sep 2023 15:00	Category 3	185	no people	no people	20.3, -58.2
18	09 Sep 2023 21:00	Category 3	185	no people	no people	20.7, -59.1
19	10 Sep 2023 03:00	Category 2	167	no people	no people	21, -59.9
20	10 Sep 2023 09:00	Category 2	167	no people	no people	21.4, -60.5
21	10 Sep 2023 15:00	Category 2	176	no people	no people	21.6, -61
22	10 Sep 2023 21:00	Category 3	194	no people	no people	22.1, -61.7
23	11 Sep 2023 03:00	Category 3	194	no people	no people	22.6, -62.2
24	11 Sep 2023 09:00	Category 3	194	no people	no people	23.1, -62.6
25	11 Sep 2023 15:00	Category 3	194	no people	no people	23.5, -63.5
26	11 Sep 2023 21:00	Category 3	185	no people	no people	23.6, -64.2
27	12 Sep 2023 03:00	Category 3	185	no people	no people	23.9, -64.8
28	12 Sep 2023 09:00	Category 3	185	no people	no people	24, -65.4
29	12 Sep 2023 15:00	Category 3	185	no people	no people	24.3, -65.9
30	12 Sep 2023 21:00	Category 3	185	no people	no people	24.7, -66.4
31	13 Sep 2023 03:00	Category 3	185	no people	no people	25.3, -66.7
32	13 Sep 2023 09:00	Category 3	185	no people	no people	25.7, -67.1
33	13 Sep 2023 15:00	Category 3	185	no people	no people	26.4, -67.2
33	14 Sep 2023 00:00	Category 2	176	no people	26000 people	27.6, -67.7
33	14 Sep 2023 12:00	Category 2	167	no people	62000 people	29.6, -68.2
33	15 Sep 2023 00:00	Category 2	157	no people	62000 people	31.8, -68.2
33	15 Sep 2023 12:00	Category 1	148	no people	130000 people	34.6, -67.6
33	16 Sep 2023 00:00	Category 1	139	no people	10.6 million people	37.9, -67.1
33	16 Sep 2023 12:00	Category 1	130	370000 people	12.9 million people	41.1, -67.2
33	17 Sep 2023 12:00	Tropical storm	93	no people	3 million people	46.1, -66.6	Canada
33	18 Sep 2023 12:00	Tropical storm	65	no people	no people	52.1, -56.4	Canada

Actual track of the current bulletin

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

Download:

Exposed population - AoIs

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

Countries

Country	Population in Category 1 or higher strength
United States	22000 people
Canada	320000 people

Provinces

Region Province	Country	Population in Category 1 or higher strength
Maine	United States	22000 people
Nova Scotia	Canada	32000 people
New Brunswick	Canada	280000 people

Populated places

Name	Region Province	Country	City class	Population
Yarmouth	Nova Scotia	Canada	City	7500 people
Saint John	New Brunswick	Canada	Major city	86000 people
Fredericton	New Brunswick	Canada	Major city	52000 people

Critical infrastructure

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

Airports

Name	IATA Code	Elevation (m)	Usage	Runway type	IFR	Runway Length (ft)
Yarmouth	YQI	43	Civ.	Paved	Yes	6000
Drisko		21				0
Ramsdell Field		17				0
Machias Valley		29				0
Grand Manan		73				0
Lubec Municipal		26				0
Eastport Municipal		14	Civ.	Paved	Yes	4000
Morrison's		61				0
Flying Ed		134				0
Georgia-Pacific Corporation		47				0
Princeton Municipal	PNN	81	Civ.	Paved	Yes	4000
St Stephen		29				0
Saint John	YSJ	109	Civ.	Paved	Yes	7000
Brockway		91				0
Vanceboro		117				0
Blissville		23				0
Gagetown	YCX	unknown				0
Fredericton	YFC	20	Civ.	Paved	Yes	6000
Weyman		43				0
Chipman		15				0
Juniper		259				0
Doaktown		99				0

Ports

Name	LOCODE	Country
Wedgeport		Canada
Yarmouth	CAYQI	Canada
Meteghan	CAMET	Canada
Weymouth	CAWEY	Canada
Jonesport	USJON	Wake Island
Seal Cove		Canada
Machiasport		Wake Island
Machias		Wake Island
North Head		Canada
Eastport	USEPM	Wake Island
Letang Harbour		Canada
Saint Andrews	CASAD	Canada
Dipper Harbour West		Canada
Saint Andrews	CASAD	Canada
Calais		Canada
Canaport	CACPT	Canada
Saint John	CASJB	Canada

Dams

Dam Name	River	Year
Chase S. Mill Dam	Chase Mill Stream	n/a
Cathance Lake Dam	Cathance Stream	1980
Meddybemps Dam	Dennys River	1973
Woodland Dam	St. Croix	1906
Grand Falls Main Dam	Saint Croix River	1915
Vanceboro	St. Croix River	1967
Mactaquac	Saint John	1968

Nuclear plants

Name	Country	Reactors
POINT LEPREAU	CANADA	1

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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

0.1 m

The maximum Storm surge height is 0.1m in Colonia do Pescadores, Brazil. This height is estimated for 06 Sep 2023 13:00 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 (2 locations). Calculation based on advisory number 20 of 10 Sep 2023 09:00:00 UTC. (Simulation using 2 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	06 Sep 2023 13:00	Colonia do Pescadores	Brazil	0.1
	10 Sep 2023 23:00	The Settlement	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.