Overall Green Tropical Cyclone alert for ALPHA-20 in Portugal, Spain on 18 Sep 2020 16:30 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 ALPHA-20

in Portugal, Spain

18 Sep 2020 16 UTC

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Meteorological source:

GDACS NOAA

Impact Single TC

GFS
HWRF
ECMWF

Impact based on all weather systems in the area

Impact

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

Meteorological source	GDACS
Exposed countries	Portugal, Spain
Exposed population	No people in Category 1 or higher
Maximum wind speed	83 km/h
Maximum storm surge	0.3 m (18 Sep 17:30 UTC)
Vulnerability	Low (Portugal)
Landfall	between 18 Sep 2020 16:30 - 19 Sep 2020 00:00 in Portugal

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	83 km/h	0.3 m	n.a.	0.5
Overall	83 km/h	0.3 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

83 km/h Current Max.

Up to 3 million people in Tropical Storm strength or higher (see SSHS)

Impact Timeline

Alert	N°	Date (UTC)	Max Winds (km/h)	Population in Tropical Storm or higher	Population in Cat 1. or higher	Countries
	1	18 Sep 2020 16:30	83	3 million	No people	Portugal, Spain

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	18 Sep 2020 16:30	Tropical storm	83	no people	no people	39.9, -9.3
1	19 Sep 2020 00:00	Tropical depression	56	no people	no people	41.5, -7.5	Portugal
1	19 Sep 2020 12:00	Tropical depression	56	no people	no people	44.2, -4.2

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
Portugal
Spain

Provinces

Region Province	Country
Leiria	Portugal
Coimbra	Portugal
Santarem	Portugal
Aveiro	Portugal
Viseu	Portugal
Guarda	Portugal
Porto	Portugal
Braga	Portugal
Vila Real	Portugal
Braganca	Portugal
Galicia	Spain

Populated places

Name	Region Province	Country	City class	Population
Marinha Grande	Leiria	Portugal	City	29000 people
Leiria	Leiria	Portugal	City	45000 people
Figueira da Foz	Coimbra	Portugal	City	12000 people
Pombal	Leiria	Portugal	City	17000 people
Coimbra	Coimbra	Portugal	Major city	110000 people
Ílhavo	Aveiro	Portugal	City	17000 people
Aveiro	Aveiro	Portugal	City	54000 people
Ovar	Aveiro	Portugal	City	18000 people
São João da Madeira	Aveiro	Portugal	City	21000 people
Espinho	Aveiro	Portugal	City	9400 people
Pedroso	Porto (Oporto)	Portugal	City	-
Viseu	Viseu	Portugal	City	26000 people
Avintes	Porto (Oporto)	Portugal	City	12000 people
Valongo	Porto (Oporto)	Portugal	City	21000 people
Fafe	Braga	Portugal	City	17000 people
Vila Real	Vila Real	Portugal	City	17000 people
Chaves	Vila Real	Portugal	City	13000 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)
Monte Real		57	Mil.	Paved	Yes	8000
Coimbra	CBP	179	Civ.	Paved	No	3000
Aveiro		8	Civ.	Paved	No	4500
Ovar		17	Mil.	Paved	Yes	8000
Espinho		3	Civ.	Paved	No	4900
Viseu	VSE	628	Civ.	Paved	No	3200
Vila Real	VRL	550	Civ.	Paved	No	3100
Chaves	CHV	unknown				0

Ports

Name	LOCODE	Country
Nazare		Portugal
Figueira Da Foz	PTFDF	Portugal
Aveiro	PTAVE	Portugal

Dams

Dam Name	River	Year
Raiva	Mondego	1981
Fronhas	Alva	1984
Aguieira	Mondego	1981
Torrao	Tamega	1988
Carrapatelo	Douro	1972
Varosa	Varosa	1976
Regua	Douro	1973
Vilar	Tavora	1965
Valeira	Douro	1975

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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

0.3 m

The maximum Storm surge height is 0.3m in Figueira da Foz, Portugal. This height is estimated for 18 Sep 2020 17:30 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 (19 locations). Calculation based on advisory number 1 of 18 Sep 2020 16:30:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	18 Sep 2020 17:30	Figueira da Foz	Portugal	0.3
	18 Sep 2020 17:30	Pedrogao	Portugal	0.2
	18 Sep 2020 17:30	Leirosa	Portugal	0.2
	18 Sep 2020 17:30	Costa de Lavos	Portugal	0.2
	18 Sep 2020 18:30	Bom Sucesso	Portugal	0.2
	18 Sep 2020 18:30	Quiaios	Portugal	0.2
	18 Sep 2020 19:30	Praia da Tocha	Portugal	0.2
	18 Sep 2020 19:30	Praia de Mira	Portugal	0.2
	18 Sep 2020 19:30	Gafanha da Boa Hora	Portugal	0.2
	18 Sep 2020 17:30	S. Pedro de Muel	Portugal	0.1
	18 Sep 2020 19:30	Gafanha do Carmo	Portugal	0.1
	18 Sep 2020 19:30	Sao Jacinto	Portugal	0.1
	18 Sep 2020 17:30	S. Martinho do Porto	Portugal	0.1
	18 Sep 2020 17:30	Nazare	Portugal	0.1
	18 Sep 2020 17:30	Nazare	Portugal	0.1
	18 Sep 2020 19:30	Quinta do Cochel	Portugal	0.1
	18 Sep 2020 20:30	Torrao do Lameiro	Portugal	0.1
	18 Sep 2020 17:30	Vale de Paredes	Portugal	0.1
	18 Sep 2020 20:30	Torreira	Portugal	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.