Overall Red alert Tropical Cyclone for MANGKHUT-18
in China, Philippines, Guam, Northern Mariana Islands, Viet Nam, Laos, Myanmar


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

Meteorological source GDACS
Glide number: TC-2018-000152-CHN
Exposed countries China, Philippines, Guam, Northern Mariana Islands, Viet Nam, Laos, Myanmar
Exposed population 60.9 million in Category 1 or higher
Maximum wind speed 287 km/h
Maximum storm surge
Vulnerability Medium (China)


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 194 km/h 0.0 m n.a. 1.5
Overall 287 km/h 0.0 m n.a. 1.5

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


194 km/h Current Max.

Up to 160000 people in Category 1 strength or higher (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm or higher
Population in
Cat 1. or higher
Orange 1 07 Sep 2018 00:00 194 210 thousand 160 thousand Guam

Bulletin Timeline

Alert Date (UTC) Category
Max winds
Population in
Cat.1 or higher
Population in
Tropical Storm
or higher
Location (lat, lon) Countries
1 07 Sep 2018 00:00 Tropical depression 37 no people no people 12.3, 168
1 07 Sep 2018 12:00 Tropical depression 56 no people no people 12.8, 165.8
1 08 Sep 2018 00:00 Tropical storm 74 no people no people 13.3, 163.2
1 08 Sep 2018 12:00 Tropical storm 83 no people no people 13.7, 160.3
1 09 Sep 2018 00:00 Tropical storm 102 no people no people 13.7, 157.1
1 10 Sep 2018 00:00 Category 1 139 no people 160000 people 13, 151.2 Guam
1 11 Sep 2018 00:00 Category 3 194 160000 people 210000 people 12.8, 147.1 Guam
1 12 Sep 2018 00:00 Category 4 250 no people no people 14.3, 143.3
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.

Exposed population - AoIs

Exposed population in the potential affected countries, provinces and populated places




Region Province Country
Guam Guam

Populated places

Name Region Province Country City class Population
Hagåtña Guam Capital 1000 people

Critical infrastructure

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


Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft)
Rota I International ROP 185 Civ. Paved Yes 6000
Andersen AFB UAM 191 0
A.B. Won Pat International GUM 91 0


Name LOCODE Country
Rota Northern Mariana Islands
Apra (Agana) GUAPR Guam
Apra Harbor Guam


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. 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 07 Sep 2018 00:00:00 UTC. (Simulation using 2 minute resolution)

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