Overall Green alert Tropical Cyclone for TWENTYONE-20
in Australia
11 Mar 2020 18 UTC
click on to select bulletin time
Impact Single TC
Impact based on all weather systems in the area

Impact

Tropical Cyclone TWENTYONE-20 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source HWRF
Exposed countries Australia
Exposed population No people in Category 1 or higher
Maximum wind speed 79 km/h
Maximum storm surge 0.4 m (14 Mar 07:15 UTC)
Vulnerability Low (Australia)

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 79 km/h 0.4 m 223 mm 0.5
HWRF Overall 83 km/h 0.4 m 430 mm 0.5

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

TOP

Wind

83 km/h

Up to Few people can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 11 Mar 2020 18:00 UTC
CategoryCountryPopulation 
Tropical StormAustralia149 

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 Mar 2020 06:00 86 - - - - - - -
GREEN 2 11 Mar 2020 12:00 83 -
- - - - - Australia
GREEN 3 11 Mar 2020 18:00 83 -
- - - - - Australia
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 11 Mar 2020 18:00 UTC
LevelCountryPopulation 
100-250 mmAustralia36 
50-100 mmAustralia8,282 

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 Mar 2020 06:00 140 - - - - - - -
Blue 2 11 Mar 2020 12:00 374 - - - - - - -
Blue 3 11 Mar 2020 18:00 257 Few people
- - - - Australia




Impact estimation for the next 72h
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StormSurge

0.4 m

The maximum Storm surge height is  0.4m in Tamala, Australia. This height is estimated for 14 Mar 2020 07:15 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 Mar 2020 18:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
14 Mar 2020 07:15 Tamala Australia  0.4
14 Mar 2020 06:30 Carrarang Australia  0.4
14 Mar 2020 07:30 Nanga Australia  0.4
14 Mar 2020 10:45 Shark Bay Australia  0.3
14 Mar 2020 10:45 Monkey Mia Australia  0.3
12 Mar 2020 06:45 Dampier Australia  0.3
12 Mar 2020 06:45 Karratha Australia  0.3
11 Mar 2020 21:45 Kencong Indonesia  0.3
11 Mar 2020 21:45 Lodjedjer Indonesia  0.3
14 Mar 2020 03:15 Useless Loop Australia  0.3
14 Mar 2020 03:15 Denham Australia  0.3
12 Mar 2020 20:00 Learmonth Australia  0.3
11 Mar 2020 20:30 East Lewis I Australia  0.3
14 Mar 2020 03:30 Dirk Hartog Australia  0.2
12 Mar 2020 07:30 Condon Australia  0.2
12 Mar 2020 11:45 Mardie Australia  0.2
12 Mar 2020 19:45 Exmouth Australia  0.2
12 Mar 2020 07:30 Port Hedland Australia  0.2
12 Mar 2020 06:00 Pardoo Australia  0.2
12 Mar 2020 07:00 Wickham Australia  0.2
12 Mar 2020 07:00 Point Samson Australia  0.2
12 Mar 2020 07:00 Cossack Australia  0.2
12 Mar 2020 05:15 Ah Chong I Australia  0.2
12 Mar 2020 18:45 Onslow Australia  0.2
14 Mar 2020 11:15 Gregory Australia  0.1
14 Mar 2020 11:15 Lynton Australia  0.1
14 Mar 2020 11:15 Horrocks Australia  0.1
12 Mar 2020 18:30 Glenroy Australia  0.1
14 Mar 2020 11:45 Drummond Cove Australia  0.1
14 Mar 2020 11:45 Popes Landing Australia  0.1
14 Mar 2020 11:45 Waggrakine Australia  0.1
14 Mar 2020 11:45 Geraldton Australia  0.1
14 Mar 2020 10:00 Kalbarri Australia  0.1
14 Mar 2020 03:00 Carnarvon Australia  0.1
14 Mar 2020 12:00 Greenough Australia  0.1
14 Mar 2020 11:30 Denison Australia  0.1
14 Mar 2020 11:30 Port Denison Australia  0.1
14 Mar 2020 11:30 Dongara Australia  0.1