Overall Red alert Tropical Cyclone for CHANTHU-21
in China, Philippines
11 Sep 2021 18 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 HWRF
Exposed countries China, South Korea, Taiwan, Japan, Philippines
Exposed population 520 thousand in Category 1 or higher
Maximum wind speed 198 km/h
Maximum storm surge 0.6 m (11 Sep 20:00 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
HWRF Current 198 km/h 0.6 m 328 mm 0.5
HWRF Overall 274 km/h 1.9 m 2082 mm 1.5

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

TOP

Wind

274 km/h

Up to 520 thousand in Category 1 strength or higher (see SSHS)



Wind exposed population - AoIs

Estimations based on the bulletin of 11 Sep 2021 18:00 UTC
CategoryCountryPopulation 
CAT. 2China291 
CAT. 1China, Japan517,776
+
China516,106 
Japan1,670 
Tropical StormChina, South Korea, Taiwan, Japan, Philippines61,712,356
+
China54,529,351 
South Korea400 
Taiwan7,059,882 
Japan104,889 
Philippines17,831 

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 06 Sep 2021 06:00 58 - - - - - - -
GREEN 2 06 Sep 2021 12:00 0 - - - - - - -
GREEN 3 06 Sep 2021 18:00 72 - - - - - - -
GREEN 4 07 Sep 2021 00:00 104 - - - - - - -
GREEN 5 07 Sep 2021 06:00 194 - - - - - - -
GREEN 6 07 Sep 2021 12:00 162 - - - - - - -
GREEN 7 07 Sep 2021 18:00 259 - - - - - - -
GREEN 8 08 Sep 2021 00:00 266 - - - - - - -
GREEN 9 08 Sep 2021 06:00 270 - - - - - - -
GREEN 10 08 Sep 2021 12:00 252 - - - - - - -
GREEN 11 08 Sep 2021 18:00 256 - - - - - - -
GREEN 12 09 Sep 2021 00:00 266 - - - - - - -
GREEN 13 09 Sep 2021 06:00 234 - - - - - - -
GREEN 14 09 Sep 2021 12:00 230 - - - - - - -
GREEN 15 09 Sep 2021 18:00 216 - - - - - - -
GREEN 16 10 Sep 2021 00:00 266 - - - - - - -
GREEN 17 10 Sep 2021 06:00 266 -
- - - - - Philippines
GREEN 18 10 Sep 2021 12:00 252 1 thousand
- - - - Philippines
GREEN 19 10 Sep 2021 18:00 274 20 thousand
Philippines
GREEN 20 11 Sep 2021 00:00 266 20 thousand
- -
Taiwan, Philippines
GREEN 21 11 Sep 2021 06:00 259 5 thousand
- Taiwan, Philippines
GREEN 22 11 Sep 2021 12:00 230 2 thousand
- - - Taiwan, China, Japan, Philippines
GREEN 23 11 Sep 2021 18:00 212 520 thousand
- - - China, South Korea, Taiwan, Japan, Philippines
Download:





Impact estimation for the next 72h
TOP

Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 11 Sep 2021 18:00 UTC
LevelCountryPopulation 
750-1000 mmChina2,353 
500-750 mmChina39,488 
250-500 mmChina, Taiwan22,844,245
+
China22,800,398 
Taiwan43,846 
100-250 mmChina, Taiwan, Japan, Philippines70,655,625
+
China66,896,498 
Taiwan3,758,903 
Japan194 
Philippines28 
50-100 mmSouth Korea, China, Taiwan, Japan41,702,756
+
South Korea400 
China32,827,096 
Taiwan8,871,846 
Japan3,413 

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 06 Sep 2021 06:00 152 - - - - - - -
Blue 2 06 Sep 2021 12:00 0 - - - - - - -
Blue 3 06 Sep 2021 18:00 276 - - - - - - -
Blue 4 07 Sep 2021 00:00 128 - - - - - - -
Blue 5 07 Sep 2021 06:00 210 - - - - - - -
Blue 6 07 Sep 2021 12:00 148 - - - - - - -
Blue 7 07 Sep 2021 18:00 268 - - - - - - -
Blue 8 08 Sep 2021 00:00 386 - - - - - - -
Blue 9 08 Sep 2021 06:00 405 - - - - - - -
Blue 10 08 Sep 2021 12:00 319 - - - - - - -
Blue 11 08 Sep 2021 18:00 250 - - - - - - -
Blue 12 09 Sep 2021 00:00 353 - - - - - - -
Blue 13 09 Sep 2021 06:00 306 - - - - - - -
Blue 14 09 Sep 2021 12:00 233 - - - - - - -
Blue 15 09 Sep 2021 18:00 224 - - - - - - -
Blue 16 10 Sep 2021 00:00 279 -
- - - - - Philippines
Blue 17 10 Sep 2021 06:00 330 30 thousand
- - - - Philippines
Blue 18 10 Sep 2021 12:00 265 30 thousand
- - - - Philippines
Blue 19 10 Sep 2021 18:00 310 20 thousand
- - - - Taiwan, Philippines
Blue 20 11 Sep 2021 00:00 301 50 thousand
- - - - Taiwan, Philippines
Blue 21 11 Sep 2021 06:00 385 100 thousand
- - - Taiwan, Philippines
Blue 22 11 Sep 2021 12:00 275 190 thousand
- - - - Taiwan, Philippines
Blue 23 11 Sep 2021 18:00 1002 93.5 million
- South Korea, China, Taiwan, Japan, Philippines




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 11 Sep 2021 18:00 UTC