Overall Green alert Tropical Cyclone for TWENTYONE-20
in Australia
11 Mar 2020 12 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 83 km/h
Maximum storm surge 0.4 m (12 Mar 21:15 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 83 km/h 0.4 m 374 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)

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Wind

83 km/h

Up to 3 thousand 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 12:00 UTC
CategoryCountryPopulation 
Tropical StormAustralia3,164 

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
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 12:00 UTC
LevelCountryPopulation 
100-250 mmAustralia772 
50-100 mmAustralia17,304 

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 12:00 395 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 Exmouth, Australia. This height is estimated for 12 Mar 2020 21:15 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 12:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
12 Mar 2020 21:15 Exmouth Australia  0.4
12 Mar 2020 22:00 Learmonth Australia  0.4
14 Mar 2020 07:30 Nanga Australia  0.3
14 Mar 2020 08:00 Shark Bay Australia  0.3
14 Mar 2020 08:00 Monkey Mia Australia  0.3
11 Mar 2020 21:45 Kencong Indonesia  0.3
11 Mar 2020 21:45 Lodjedjer Indonesia  0.3
14 Mar 2020 05:30 Carrarang Australia  0.3
14 Mar 2020 05:30 Tamala Australia  0.3
12 Mar 2020 11:45 Mardie Australia  0.3
12 Mar 2020 01:45 East Lewis I Australia  0.3
12 Mar 2020 01:45 Dampier Australia  0.3
12 Mar 2020 03:30 Ah Chong I Australia  0.2
12 Mar 2020 03:30 Karratha Australia  0.2
12 Mar 2020 20:15 Onslow Australia  0.2
12 Mar 2020 23:00 Glenroy Australia  0.2
12 Mar 2020 07:45 Port Hedland Australia  0.2
12 Mar 2020 15:30 Pardoo Australia  0.2
12 Mar 2020 05:30 Condon Australia  0.2
14 Mar 2020 06:00 Useless Loop Australia  0.2
14 Mar 2020 06:00 Denham 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
11 Mar 2020 13:00 Gregory Australia  0.2
11 Mar 2020 13:00 Lynton Australia  0.2
11 Mar 2020 13:00 Horrocks Australia  0.2
11 Mar 2020 13:30 Denison Australia  0.1
11 Mar 2020 13:30 Port Denison Australia  0.1
11 Mar 2020 13:30 Dongara Australia  0.1
11 Mar 2020 13:15 Drummond Cove Australia  0.1
11 Mar 2020 13:15 Popes Landing Australia  0.1
14 Mar 2020 02:15 Dirk Hartog Australia  0.1
11 Mar 2020 13:30 Greenough Australia  0.1
11 Mar 2020 13:15 Waggrakine Australia  0.1
14 Mar 2020 02:45 Carnarvon Australia  0.1
11 Mar 2020 13:00 Geraldton Australia  0.1
12 Mar 2020 23:45 Bundera Bundera Australia  0.1
11 Mar 2020 13:30 Quinns Rock Australia  0.1
11 Mar 2020 13:30 Mullalloo Beach Australia  0.1
11 Mar 2020 13:30 North Beach Australia  0.1
11 Mar 2020 13:30 Scarborough Australia  0.1
11 Mar 2020 13:15 Cottesloe Australia  0.1
11 Mar 2020 13:15 Peppermint Grove Australia  0.1
11 Mar 2020 13:15 Swanbourne Australia  0.1
11 Mar 2020 13:15 Claremont Australia  0.1
11 Mar 2020 13:30 Two Rocks Australia  0.1
11 Mar 2020 13:30 Yanchep Australia  0.1