Overall Green alert Tropical Cyclone for NORMAN-18


Tropical Cyclone NORMAN-18 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source GDACS (NOAA)
Exposed countries
Exposed population No people in Category 1 or higher
Maximum wind speed 259 km/h
Maximum storm surge
Vulnerability --


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
GDACS Current 157 km/h 0.0 m n.a. 0.5
GDACS Overall 259 km/h 0.0 m n.a. 0.5

Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)


157 km/h Current

Up to no people in Category 1 strength or higher (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm
Population in
Cat. 1 or higher
Green 1 28 Aug 2018 15:00 157 Few people No people

Bulletin Timeline

Alert Date (UTC) Category Max winds
Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon) Countries
1 28 Aug 2018 15:00 Tropical depression 56 no people no people 17.1, -111.8
1 29 Aug 2018 00:00 Tropical storm 65 <1000 people no people 17.7, -112.9
1 29 Aug 2018 12:00 Tropical storm 83 <1000 people no people 18.4, -114.6
1 30 Aug 2018 00:00 Tropical storm 102 no people no people 18.8, -116.4
1 30 Aug 2018 12:00 Category 1 120 no people no people 18.9, -118.1
1 31 Aug 2018 12:00 Category 1 148 no people no people 18.5, -121.8
1 01 Sep 2018 12:00 Category 2 157 no people no people 17.5, -126
1 02 Sep 2018 12:00 Category 2 157 no people no people 17, -130
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.

Exposed population

Critical infrastructure

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


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.



0 m

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. 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 (0 locations). Calculation based on advisory number 1 of 28 Aug 2018 15:00:00 UTC. (Simulation using 6 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)