Overall Red alert Tropical Cyclone for CHANTHU-21
in China, Philippines
10 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 180 thousand in Category 1 or higher
Maximum wind speed 274 km/h
Maximum storm surge 1.1 m (11 Sep 00:00 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 274 km/h 1.1 m 310 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 180 thousand in Category 1 strength or higher (see SSHS)



Wind exposed population - AoIs

Estimations based on the bulletin of 10 Sep 2021 18:00 UTC
CategoryCountryPopulation 
CAT. 5Philippines13,142 
CAT. 4Philippines4,688 
CAT. 3Taiwan72 
CAT. 2Japan, Taiwan2,610
+
Taiwan1,878 
Japan731 
CAT. 1China, Japan, Taiwan, Philippines159,360
+
China154,872 
Taiwan2,125 
Japan938 
Philippines1,423 
Tropical StormChina, South Korea, Taiwan, Japan, Philippines50,225,959
+
China48,475,774 
South Korea304 
Taiwan1,520,528 
Japan101,697 
Philippines127,654 

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 18:00 281 180 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 10 Sep 2021 18:00 UTC
LevelCountryPopulation 
750-1000 mmTaiwan64 
500-750 mmChina, Taiwan, Philippines155,271
+
China20,252 
Taiwan133,959 
Philippines1,059 
250-500 mmChina, Taiwan, Philippines2,724,109
+
China2,432,747 
Taiwan273,523 
Philippines17,837 
100-250 mmChina, Taiwan, Japan, Philippines46,778,442
+
China45,210,051 
Taiwan1,202,664 
Japan2,211 
Philippines363,514 
50-100 mmChina, Taiwan, Japan, Philippines33,309,796
+
China22,052,255 
Taiwan10,108,365 
Japan51,510 
Philippines1,097,665 

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 18:00 933 49.7 million
- 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

1.1 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 10 Sep 2021 18:00 UTC