Overall Green alert Tropical Cyclone for MONA-19
in Fiji

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 21 of tropical cyclone MONA-19 issued at 7 Jan 2019 18:00:00 (GDACS Event ID 1000541). 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.


The maximum Storm surge height is  0.6m in Korosi, Fiji. This height is estimated for 06 Jan 2019 17:45 UTC .

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: HWRF)


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

Affected locations

Alert Date (UTC) Name Country Storm surge height (m)
06 Jan 2019 17:45 Korosi Fiji  0.6
06 Jan 2019 17:45 Korotasere Fiji  0.6
06 Jan 2019 17:45 Naweni Fiji  0.6
06 Jan 2019 17:45 Nakarambo Fiji  0.6
06 Jan 2019 17:45 Viani Fiji  0.6
06 Jan 2019 17:45 Ndrekeniwai Fiji  0.6
06 Jan 2019 09:45 Mbangasau Fiji  0.5
06 Jan 2019 09:45 Malake Fiji  0.5
06 Jan 2019 09:45 Biagunu Fiji  0.5
06 Jan 2019 10:00 Lao Fiji  0.5
06 Jan 2019 17:30 Nailou Fiji  0.4
06 Jan 2019 17:30 Nawi Fiji  0.4
05 Jan 2019 00:45 Silverdale New Zealand  0.4
05 Jan 2019 00:45 Orewa New Zealand  0.4
Locations affected by Storm surge (15 of 754)
Calculation based on advisory number of 07 Jan 2019 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.