Overall Green alert Tropical Cyclone for ONE-18
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alert for storm surge impact based on HWRF 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 6 of tropical cyclone ONE-18 issued at 12 May 2018 0:00:00 (GDACS Event ID 1000450). 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: 71 Km/h
he maximum Storm surge height is:The tropical cyclone did not reach sufficient strength to cause significant storm surge or is not predicted to affect populated places.

Storm surge

View animation and affected locations in an interactive map: open

Storm surge maximum height HWRF
Storm surge maximum height HWRF (Source: JRC)
Max windspeed HWRF
Max windspeed HWRF (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
20180510.18 81 km/h (50 mph) No people
20180511.00 69 km/h (43 mph) No people
20180511.06 85 km/h (53 mph) No people
20180511.12 61 km/h (38 mph) No people
20180511.18 71 km/h (44 mph) No people

Affected locations

Alert Date (UTC) Name Country Storm surge height (m)
Locations affected by Storm surge (15 of 0)
Calculation based on advisory number of 11 May 2018 18:00.
(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.