Typhoon Damrey 2017

Start Date

November 9, 2017


Satelite Image of Typhoon Damrey

acquired November 3, 2017


Typhoon Damrey (known in the Philippines as Severe Tropical Storm Ramil) affected Vietnam during early November.  Damrey rapidly intensified into a typhoon on November 3rd, and reached its peak strength as a Category 2 storm on the same day.  Damrey made landfall over Khánh Hoà Vietnam on November 4th, and rapidly weakened, dissipating on November 5th.  Damrey was the strongest typhoon to strike South-Central Vietnam since Typhoon Lingling in 2001.
Strong winds, heavy rainfall, and severe flooding in Central Vietnam killed 69 people, and caused damages of at least $332 million.  Several reservoirs are at dangerous levels, and there are fears of dam failure in the impacted area.

External Links:

International Charter - https://disasterscharter.org/web/guest/activations/-/article/cyclone-in-...
Hazards Data Distribution System (HDDS):  https://hddsexplorer.usgs.gov/ 
Dartmouth Flood Observatory:  http://floodobservatory.colorado.edu/Events/2017Vietnam4533/2017Vietnam4...
Global Precipitation Measurement:  http://floodobservatory.colorado.edu/ 
NRL Tropical Cyclone Page:  https://www.nrlmry.navy.mil/TC.html
NASA Project Mekong: http://projectmekongnasa.appspot.com/

Latest Updates

November 13, 2017
ESA Sentinel-1 Imagery
Acquired Nov. 11. 2017 Acquired Nov, 11 2017 NASA color coded SAR based flood detection maps reveal extensive flooding in areas of Vietnam. The SAR data used in analysis are Copernicus Sentinel data (2017), processed by ESA. In the figures, the blue tones represent flooding due to Typhoon Damrey while the black color represents water covered areas before the typhoon. Other colors indicate mostly land...
November 13, 2017
Topo relief map with flood modelling layer overlay.
Topographic relief map showing estimated flood extent. Darthmouth Flood Observatory of University of Colorado estimated maximum flood extent on November 7th, 2017 using NASA MODIS and Copernicus Sentinel 1 satelite data, operated by the European Space Agency (ESA). In the figure, the light gray denotes all previously-mapped flooding, and red is the active flooding. Blue shows the reference water extent.                    ...
November 13, 2017
Google map image with Inundation layer.
Inundation Layer from Project Mekong App as of 11/10/2017. Current inundation layer from the Project Mekong App as of 11/10/2017. Red indicates areas with detected flooding. The application uses LANCE MODIS imagery (collected today, 11/10/2017) and applies a dynamic surface water classifier based on statistical training and thresholding of NDVI values. The method is outlined in more detail in Ahamed and Bolten, 2017 (https://doi.org/10...
November 13, 2017
Total rainfall map using IMERG model
NASA IMERG model generated from October 31 to November 6, 2017 data.  NASA's Integrated Multi-satellitE Retrievals data (IMERG) estimates precipitation from a combination of space-borne passive microwave sensors. This image shows IMERG rainfall estimates over Southeast Asia during the period from October 31 to November 6, 2017. IMERG estimated that more than 500 mm (19.7 inches) of rain was common in this part of south central Vietnam.