Overall Green alert Tropical Cyclone for FOUR-21
in India
11 Nov 2021 06 UTC
click on to select bulletin time
Impact Single TC
Impact based on all weather systems in the area

Impact

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

Meteorological source GFS
Exposed countries
Exposed population No people in Category 1 or higher
Maximum wind speed 68 km/h
Maximum storm surge 0.3 m (11 Nov 11:15 UTC)
Vulnerability High (India)

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 68 km/h 0.3 m 36 mm 0.5
GFS Overall 68 km/h 0.3 m 376 mm 0.5

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

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Wind

68 km/h

No people by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

No exposed population (in Tropical Storm or higher) based on the bulletin of 11 Nov 2021 06:00 UTC

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 11 Nov 2021 06:00 68 - - - - - - -
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 11 Nov 2021 06:00 UTC
LevelCountryPopulation 
250-500 mmIndia714,541 
100-250 mmIndia7,288,143 
50-100 mmIndia, Sri Lanka, Maldives12,030,104
+
India6,978,779 
Sri Lanka5,049,469 
Maldives1,855 

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 11 Nov 2021 06:00 357 8 million
- - - India, Sri Lanka, Maldives




Impact estimation for the next 72h
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StormSurge

0.3 m

The maximum Storm surge height is  0.3m in Durgarajupatnam, India. This height is estimated for 11 Nov 2021 11:15 UTC .

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 Nov 2021 06:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
11 Nov 2021 11:15 Durgarajupatnam India  0.3
11 Nov 2021 10:15 Therunattam India  0.2
11 Nov 2021 11:00 Kodur India  0.2
11 Nov 2021 12:00 Vedaranyam India  0.2
11 Nov 2021 12:00 Vedaranniyam India  0.2
11 Nov 2021 11:15 Chakicherla India  0.2
11 Nov 2021 10:45 Hukitala India  0.2
11 Nov 2021 10:45 Satabhaya India  0.2
11 Nov 2021 07:30 Ennore India  0.2
11 Nov 2021 07:30 Vatturupallepalem India  0.2
11 Nov 2021 07:30 Govundlapalem India  0.2
11 Nov 2021 11:15 Ullapalem India  0.2
11 Nov 2021 11:15 Pakala India  0.2
11 Nov 2021 11:15 Kottapatnam India  0.2
11 Nov 2021 11:30 Tirumullaivasal India  0.2
11 Nov 2021 11:30 Kaveripattanam India  0.2
11 Nov 2021 11:15 Kakinada India  0.2
11 Nov 2021 11:00 Lankavanidibba India  0.1
11 Nov 2021 10:15 Tiruvottiyur India  0.1
11 Nov 2021 11:30 Velangann India  0.1
11 Nov 2021 11:15 Saint Thomas Mount India  0.1
11 Nov 2021 11:15 Madhavaram India  0.1
11 Nov 2021 11:15 Chennai India  0.1
11 Nov 2021 10:45 Karaikal India  0.1
11 Nov 2021 10:45 Accarapatam India  0.1
11 Nov 2021 10:45 Nagappattinam India  0.1
11 Nov 2021 11:15 Peddapatnam India  0.1
11 Nov 2021 10:15 Jaffna Sri Lanka  0.1
11 Nov 2021 10:15 Idaikkadu Sri Lanka  0.1
11 Nov 2021 10:15 Kavutarimunai Sri Lanka  0.1
11 Nov 2021 10:15 Pooneryn Sri Lanka  0.1
11 Nov 2021 07:45 Porto Novo India  0.1
11 Nov 2021 08:00 Tranquebar India  0.1
11 Nov 2021 08:00 Tarangambadi India  0.1
11 Nov 2021 10:30 Chittivalasa India  0.1
11 Nov 2021 10:30 Bhimunipatnam India  0.1
11 Nov 2021 10:30 Konada India  0.1
11 Nov 2021 07:45 Mahabalipuram India  0.1
11 Nov 2021 07:45 Kelambakkam India  0.1
11 Nov 2021 08:45 Ampan Sri Lanka  0.1
11 Nov 2021 08:45 Aliavalai Sri Lanka  0.1
11 Nov 2021 10:15 Purnankuppam India  0.1
11 Nov 2021 10:15 Pondicherry India  0.1
11 Nov 2021 10:15 Kalapettai India  0.1
11 Nov 2021 10:15 Nawaladi Sri Lanka  0.1
11 Nov 2021 11:00 Gollapalem India  0.1
11 Nov 2021 11:00 Antarvedi India  0.1
11 Nov 2021 10:00 Kurichchikadu Sri Lanka  0.1
11 Nov 2021 10:00 Kayts Sri Lanka  0.1
11 Nov 2021 10:00 Kankesanturai Sri Lanka  0.1
11 Nov 2021 10:45 Brynthuraichenai Sri Lanka  0.1
11 Nov 2021 10:45 Sittandy Sri Lanka  0.1
11 Nov 2021 10:45 Vedakudiyiruppu Sri Lanka  0.1
11 Nov 2021 10:45 Batticaloa Sri Lanka  0.1
11 Nov 2021 10:45 Kattankudi Sri Lanka  0.1