Overall Red alert Tropical Cyclone for CHANTHU-21
in China, Philippines
11 Sep 2021 00 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 GFS
Exposed countries Russia, Japan, China, Taiwan, Philippines
Exposed population 80 thousand in Category 1 or higher
Maximum wind speed 198 km/h
Maximum storm surge 0.7 m (11 Sep 00:45 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
GFS Current 198 km/h 0.7 m 178 mm 0.5
GFS Overall 252 km/h 1.9 m 709 mm 1.5

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

TOP

Wind

252 km/h

Up to 80 thousand in Category 1 strength or higher (see SSHS)



Wind exposed population - AoIs

Estimations based on the bulletin of 11 Sep 2021 00:00 UTC
CategoryCountryPopulation 
CAT. 2Philippines17,831 
CAT. 1China, Taiwan64,039
+
China61,677 
Taiwan2,362 
Tropical StormRussia, Japan, China, Taiwan, Philippines17,841,628
+
Russia12,267 
Japan118,402 
China17,616,123 
Taiwan76,729 
Philippines18,106 

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 68 -
- - - - - China
GREEN 2 06 Sep 2021 12:00 83 -
- - - - - China, North Korea
GREEN 3 06 Sep 2021 18:00 83 -
- - - - - China, Philippines
GREEN 4 07 Sep 2021 00:00 97 -
- - - - - Philippines
GREEN 5 07 Sep 2021 06:00 133 -
- - - - - Philippines
GREEN 6 07 Sep 2021 12:00 140 -
- - - - - Philippines
GREEN 7 07 Sep 2021 18:00 166 -
- - - - - Philippines
GREEN 8 08 Sep 2021 00:00 173 -
- - - - - Philippines
GREEN 9 08 Sep 2021 06:00 187 -
- - - - - Philippines
GREEN 10 08 Sep 2021 12:00 202 -
- - - - - Philippines
GREEN 11 08 Sep 2021 18:00 252 -
- - - - - Philippines
GREEN 12 09 Sep 2021 00:00 227 - - - - - - -
GREEN 13 09 Sep 2021 06:00 216 - - - - - - -
GREEN 14 09 Sep 2021 12:00 205 - - - - - - -
GREEN 15 09 Sep 2021 18:00 194 -
- - - - - Paracel Islands
GREEN 16 10 Sep 2021 00:00 212 -
- - - - - Paracel Islands
GREEN 17 10 Sep 2021 06:00 205 - - - - - - -
GREEN 18 10 Sep 2021 12:00 194 1 thousand
- - - - Philippines
GREEN 19 10 Sep 2021 18:00 216 3 thousand
- - - Philippines, Paracel Islands
GREEN 20 11 Sep 2021 00:00 198 80 thousand
- - - Russia, Japan, China, Taiwan, Philippines
Download:





Impact estimation for the next 72h
TOP

Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 11 Sep 2021 00:00 UTC
LevelCountryPopulation 
500-750 mmPhilippines3,007 
250-500 mmTaiwan, Philippines15,278
+
Taiwan454 
Philippines14,824 
100-250 mmRussia, South Korea, Japan, China, Taiwan, Philippines66,900,236
+
Russia27 
South Korea1,050 
Japan4,077,375 
China60,609,078 
Taiwan775,488 
Philippines1,437,215 
50-100 mmRussia, South Korea, Japan, China, Taiwan, Philippines35,409,179
+
Russia43,504 
South Korea320,471 
Japan4,023,970 
China19,952,443 
Taiwan5,317,876 
Philippines5,750,913 

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 06:00 164 -
- - - - - China
Blue 2 06 Sep 2021 12:00 126 -
- - - - - Philippines
Blue 3 06 Sep 2021 18:00 118 90 thousand
- - - - North Korea, Philippines
Blue 4 07 Sep 2021 00:00 107 10 thousand
- - - - North Korea, South Korea, Philippines
Blue 5 07 Sep 2021 06:00 132 60 thousand
- - - - Philippines
Blue 6 07 Sep 2021 12:00 186 130 thousand
- - - - Philippines
Blue 7 07 Sep 2021 18:00 230 430 thousand
- - - - Japan, Philippines
Blue 8 08 Sep 2021 00:00 216 2.2 million
- - - - Japan, Philippines
Blue 9 08 Sep 2021 06:00 227 8.8 million
- - - - Philippines
Blue 10 08 Sep 2021 12:00 215 -
- - - - - Philippines
Blue 11 08 Sep 2021 18:00 241 -
- - - - - Japan
Blue 12 09 Sep 2021 00:00 218 -
- - - - - Japan
Blue 13 09 Sep 2021 06:00 202 -
- - - - - China
Blue 14 09 Sep 2021 12:00 167 -
- - - - - Philippines
Blue 15 09 Sep 2021 18:00 179 -
- - - - - Philippines
Blue 16 10 Sep 2021 00:00 206 -
- - - - - Paracel Islands, Philippines
Blue 17 10 Sep 2021 06:00 240 - - - - - - -
Blue 18 10 Sep 2021 12:00 197 8 thousand
- - - - Philippines
Blue 19 10 Sep 2021 18:00 297 1 thousand
- - - - Philippines
Blue 20 11 Sep 2021 00:00 786 66.9 million
- - Russia, South Korea, Japan, China, 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

0.7 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 00:00 UTC