Overall Red alert Tropical Cyclone for MANGKHUT-18
in China, Philippines, Guam, Northern Mariana Islands, Viet Nam, Laos, Myanmar
Impact Single TC
Impact all weather systems in the area


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

Meteorological source GDACS
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 0.4 m (11 Sep 06:00 UTC)
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
GDACS Current 204 km/h 0.4 m n.a. 1.5
GDACS Overall 287 km/h 0.4 m n.a. 1.5

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


204 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
Orange 2 07 Sep 2018 06:00 204 210 thousand 160 thousand Guam

Bulletin Timeline

Alert Date (UTC) Category Max winds
Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon) Countries
1 07 Sep 2018 00:00 Tropical depression 37 no people no people 12.3, 168
2 07 Sep 2018 06:00 Tropical depression 46 no people no people 12.4, 166.7
2 07 Sep 2018 18:00 Tropical depression 56 no people no people 12.9, 164.3
2 08 Sep 2018 06:00 Tropical storm 65 no people no people 13.4, 161.3
2 08 Sep 2018 18:00 Tropical storm 74 no people no people 13.7, 158.2
2 09 Sep 2018 06:00 Tropical storm 93 no people no people 13.6, 155
2 10 Sep 2018 06:00 Category 1 148 210000 people 160000 people 13.1, 149.3 Guam
2 11 Sep 2018 06:00 Category 3 204 210000 people 160000 people 13.4, 145 Guam
2 12 Sep 2018 06:00 Category 4 250 no people no people 14.9, 140.7
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 Population
Guam Guam 140000 people

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.



No locations affected by storm surge > 10 cm

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.