Overall Red alert Tropical Cyclone for CHANTHU-21
in China, Philippines
14 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 Japan, South Korea, China
Exposed population No people in Category 1 or higher
Maximum wind speed 83 km/h
Maximum storm surge 0.9 m (14 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 83 km/h 0.9 m 140 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 6.2 million can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 14 Sep 2021 12:00 UTC
CategoryCountryPopulation 
CAT. 1Japan00
+
Tropical StormJapan, South Korea, China6,182,584
+
Japan5,699,794 
South Korea482,310 
China480 

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 12:00 122 -
- - - - - Philippines
GREEN 8 09 Sep 2021 00:00 137 - - - - - - -
GREEN 9 09 Sep 2021 12:00 176 - - - - - - -
GREEN 10 10 Sep 2021 00:00 169 -
- - - - - Paracel Islands
GREEN 11 10 Sep 2021 12:00 155 1 thousand
- - - - Philippines, Paracel Islands
GREEN 12 11 Sep 2021 00:00 176 10 thousand
- - - Taiwan, Philippines
GREEN 13 11 Sep 2021 12:00 151 -
- - - - - Japan, Taiwan, Philippines
GREEN 14 12 Sep 2021 00:00 119 -
- - - - - China, Japan, Taiwan, Philippines
GREEN 15 12 Sep 2021 12:00 104 -
- - - - - Russia, China, Japan, Taiwan
GREEN 16 13 Sep 2021 00:00 115 -
- - - - - Russia, South Korea, China
GREEN 17 13 Sep 2021 12:00 83 -
- - - - - Russia, South Korea, China
GREEN 18 14 Sep 2021 00:00 90 -
- - - - - South Korea, China
GREEN 19 14 Sep 2021 12:00 144 -
- - - - - Japan, South Korea, China
Download:





Impact estimation for the next 72h
TOP

Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 14 Sep 2021 12:00 UTC
LevelCountryPopulation 
250-500 mmSouth Korea115,361 
100-250 mmSouth Korea, Japan, Taiwan, Philippines1,995,342
+
South Korea837,554 
Japan799,688 
Taiwan215,071 
Philippines143,027 
50-100 mmSouth Korea, China, Japan, Taiwan, Philippines17,261,486
+
South Korea5,552,698 
China499,066 
Japan3,444,687 
Taiwan141,813 
Philippines7,623,220 

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 12:00 331 90 thousand
- - - - Japan, Philippines
Blue 8 09 Sep 2021 00:00 314 -
- - - - - Japan
Blue 9 09 Sep 2021 12:00 282 -
- - - - - China, Paracel Islands, Philippines
Blue 10 10 Sep 2021 00:00 335 30 thousand
- - - - Philippines, Paracel Islands
Blue 11 10 Sep 2021 12:00 335 330 thousand
- - - - Russia, Philippines
Blue 12 11 Sep 2021 00:00 323 40 thousand
- - - Russia, Taiwan, Philippines
Blue 13 11 Sep 2021 12:00 259 100 thousand
- - - - China, Japan, Taiwan, Philippines
Blue 14 12 Sep 2021 00:00 330 1 thousand
- - - - Russia, Japan, China, Taiwan, Philippines
Blue 15 12 Sep 2021 12:00 138 -
- - - - - Japan, China, Taiwan
Blue 16 13 Sep 2021 00:00 146 180 thousand
- - - - South Korea, Japan, China
Blue 17 13 Sep 2021 12:00 178 150 thousand
- - - - Japan, South Korea
Blue 18 14 Sep 2021 00:00 180 50 thousand
- - - - Japan, South Korea, China, Philippines
Blue 19 14 Sep 2021 12:00 424 2.1 million
- - - South Korea, China, Japan, Taiwan, 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

0.9 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 14 Sep 2021 12:00 UTC