Overall Green alert Tropical Cyclone for LESLIE-18
in Portugal

Green alert for storm surge impact based on ECMWF source

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.

This report is for advisory number 70 of tropical cyclone LESLIE-18 issued at 13 Oct 2018 21:00:00 (GDACS Event ID 1000510). However, the calculation for advisory number is not completed. Therefore, the latest available calculation is shown. All links, data, statistics and maps refer to the latest available calculation.


Population affected by cyclone-strength winds (>120km/h):No People
Saffir-Simpson Category: Tropical storm
Maximum sustained wind speed: 113 Km/h
Maximum Storm surge height is:  0.9m in Dominion, Canada.

Storm surge

View animation and affected locations in an interactive map: open

Storm surge maximum height
Storm surge maximum height (Source: JRC)
Max windspeed
Max windspeed (Source: ECMWF)


people affected <=10000
people affected >10000 and <100000
people affected >100000

Calculation Alert color Date (UTC) Wind speed Population affected
TS CAT. 1 CAT. 2 CAT. 3 CAT. 4 CAT. 5 Countries
20180923.00 89 km/h (55 mph) No people
20180923.12 104 km/h (65 mph) No people
20180924.00 103 km/h (64 mph) No people
20180924.12 117 km/h (72 mph) No people
20180925.00 113 km/h (70 mph) No people

Affected locations

Date Name Country Alert Storm surge height (m)
24 Sep 2018 18:15:00 Dominion Canada  0.9m
24 Sep 2018 18:15:00 Glace Bay Canada  0.9m
24 Sep 2018 18:15:00 Homeville Canada  0.9m
24 Sep 2018 18:15:00 Port Morien Canada  0.9m
24 Sep 2018 18:15:00 Donkin Canada  0.9m
24 Sep 2018 18:15:00 New Waterford Canada  0.7m
24 Sep 2018 18:30:00 Louisbourg Canada  0.7m
24 Sep 2018 18:30:00 Main-a-Dieu Canada  0.7m
23 Sep 2018 19:30:00 Arichat Canada  0.5m
23 Sep 2018 19:30:00 D'Escousse Canada  0.5m
23 Sep 2018 19:30:00 Petit-de-Grat Canada  0.5m
23 Sep 2018 19:30:00 Saint Peters Canada  0.5m
24 Sep 2018 04:15:00 Canso Canada  0.3m
23 Sep 2018 19:45:00 L'Ardoise Canada  0.3m
Locations affected by Storm surge (15 of 20)
Calculation based on advisory number of 25 Sep 2018 00:00.
(Simulation using minute resolution)

See full locations list (RSS)

More information

The atmospheric forcing included in the storm surge model are the pressure drop and the wind-water friction. The effects of the short waves induced by the wind (wave setup) and the precipitations are not yet implemented in the model.

  • Interactive map: open

For a full list of available products related to this event, please refer to the GDACS Resources page.