Overall Red alert Tropical Cyclone for CHANTHU-21
in China, Philippines
08 Sep 2021 12 UTC
click on to select bulletin time
Impact Single TC
Impact based on all weather systems in the area

Impact

Tropical Cyclone CHANTHU-21 can have a high humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source ECMWF
Exposed countries Taiwan, Philippines
Exposed population Few people in Category 1 or higher
Maximum wind speed 122 km/h
Maximum storm surge 0.6 m (08 Sep 12:00 UTC)
Vulnerability Medium (China)

GDACS Score

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
ECMWF Current 122 km/h 0.6 m 331 mm 0.5
ECMWF Overall 169 km/h 1.5 m 713 mm 0.5

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

TOP

Wind

169 km/h

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



Wind exposed population - AoIs

Estimations based on the bulletin of 08 Sep 2021 12:00 UTC
CategoryCountryPopulation 
CAT. 1Taiwan, Philippines376
+
Taiwan287 
Philippines89 
Tropical StormTaiwan, Philippines42,698
+
Taiwan3,789 
Philippines38,909 

See TC classification SSHS


Wind Impact Timeline

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


Alert N° Date (UTC) Max Winds (km/h) Pop in Cat. 1 or higher TS Cat. 1 Cat. 2 Cat. 3 Cat. 4 Cat. 5 Countries
GREEN 1 05 Sep 2021 12:00 65 - - - - - - -
GREEN 2 06 Sep 2021 00:00 79 -
- - - - - North Korea
GREEN 3 06 Sep 2021 12:00 94 -
- - - - - North Korea, Philippines
GREEN 4 07 Sep 2021 00:00 112 -
- - - - - Philippines
GREEN 5 07 Sep 2021 12:00 119 -
- - - - - Philippines
GREEN 6 08 Sep 2021 00:00 133 -
- - - - - Philippines
GREEN 7 08 Sep 2021 12:00 166 Few people
- - - - Taiwan, Philippines
Download:





Impact estimation for the next 72h
TOP

Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 08 Sep 2021 12:00 UTC
LevelCountryPopulation 
250-500 mmPhilippines78 
100-250 mmRussia, Japan, Taiwan, Philippines, Paracel Islands3,249,653
+
Russia72,136 
Japan148,459 
Taiwan2,362 
Philippines3,026,341 
Paracel Islands353 
50-100 mmRussia, China, Japan, South Korea, Taiwan, Philippines, Paracel Islands31,047,081
+
Russia246,406 
China3,204,796 
Japan3,094,335 
South Korea251,232 
Taiwan14,013 
Philippines24,236,194 
Paracel Islands102 

Rain Impact Timeline

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


Alert N° Date (UTC) Max Rainfall (mm) Pop >100mm or higher 50-100 100-250 250-500 500-750 750-1000 >1000 Countries
Blue 1 05 Sep 2021 12:00 194 8 thousand
- - - - China, Japan
Blue 2 06 Sep 2021 00:00 306 20 thousand
- - - China, South Korea, Japan, Philippines
Blue 3 06 Sep 2021 12:00 306 500 thousand
- - - North Korea, South Korea, Japan, Paracel Islands, Philippines
Blue 4 07 Sep 2021 00:00 284 820 thousand
- - - North Korea, South Korea, China, Philippines
Blue 5 07 Sep 2021 12:00 345 550 thousand
- - - Japan, China, Philippines
Blue 6 08 Sep 2021 00:00 272 14.4 million
- - - Japan, China, Philippines, Micronesia
Blue 7 08 Sep 2021 12:00 906 3.2 million
- - - Russia, China, Japan, South Korea, Taiwan, Philippines, Paracel Islands




Impact estimation for the next 72h
TOP

StormSurge

The calculations have been performed using NAMIDANCE computer code, from Middle East Technical University.
reference: Zaytsev, Andrey; Kurkin, Andrey; Pelinovsky, Efim; Yalciner, Ahmet C. - NUMERICAL TSUNAMI MODEL NAMI-DANCE. - Science of Tsunami Hazards . Nov2019, Vol. 38 Issue 4, p151-168. 18p.
Doaj

0.6 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.

Storm Surge Exposed population - AoIs


Storm Surge Exposed locations

Calculation based on the bulletin of 08 Sep 2021 12:00 UTC