Overall Green alert Tropical Cyclone for TWENTYONE-20
in Australia
Impact Single TC
HWRF
Impact 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 (14 Mar 03:30 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 72 km/h 0.4 m 252 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)

Wind

86 km/h

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



Wind exposed population

Estimations based on the bulletin of 12 Mar 2020 06:00 UTC (Overall situation)
CategoryCountryPopulation 
Tropical StormAustralia85 

See TC classification SSHS


Wind Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert 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 79 -
- - - - - Australia
GREEN 4 12 Mar 2020 00:00 65 - - - - - - -
GREEN 5 12 Mar 2020 06:00 72 -
- - - - - Australia




Impact estimation for the next 72h





Rain exposed population

Estimations based on the bulletin of 12 Mar 2020 06:00 UTC (Overall situation)
LevelCountryPopulation 
100-250 mmAustralia81 
50-100 mmAustralia211 

Rain Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert 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 18:00 223 - - - - - - -
Blue 4 12 Mar 2020 00:00 154 - - - - - - -
Blue 5 12 Mar 2020 06:00 252 Few people
- - - - Australia




Impact estimation for the next 72h

StormSurge

0.4 m

The maximum Storm surge height is  0.4m in Tamala, Australia. This height is estimated for 14 Mar 2020 03:30 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.

Calculation based on the bulletin of 12 Mar 2020 06:00 UTC (Overall situation)
Alert Date (UTC) Name Country Storm surge height (m)
14 Mar 2020 03:30 Tamala Australia  0.4
14 Mar 2020 03:00 Carrarang Australia  0.4
14 Mar 2020 04:00 Nanga Australia  0.4
12 Mar 2020 21:00 Learmonth Australia  0.3
14 Mar 2020 06:45 Shark Bay Australia  0.3
14 Mar 2020 06:45 Monkey Mia Australia  0.3
12 Mar 2020 07:45 East Lewis I Australia  0.3
12 Mar 2020 07:45 Dampier Australia  0.3
11 Mar 2020 21:45 Kencong Indonesia  0.3
11 Mar 2020 21:45 Lodjedjer Indonesia  0.3
12 Mar 2020 11:30 Mardie Australia  0.3
12 Mar 2020 07:00 Karratha Australia  0.3
12 Mar 2020 20:30 Exmouth Australia  0.3
14 Mar 2020 05:15 Useless Loop Australia  0.3
14 Mar 2020 05:15 Denham Australia  0.3
12 Mar 2020 07:30 Port Hedland Australia  0.3
12 Mar 2020 07:30 Condon Australia  0.3
12 Mar 2020 06:00 Pardoo Australia  0.2
12 Mar 2020 10:00 Ah Chong I Australia  0.2
12 Mar 2020 08:30 Wickham Australia  0.2
12 Mar 2020 08:30 Point Samson Australia  0.2
12 Mar 2020 08:30 Cossack Australia  0.2
12 Mar 2020 16:15 Onslow Australia  0.2
12 Mar 2020 19:30 Glenroy Australia  0.2
11 Mar 2020 08:00 Denison Australia  0.2
11 Mar 2020 08:00 Port Denison Australia  0.2
11 Mar 2020 08:00 Dongara 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 13:15 Drummond Cove Australia  0.1
11 Mar 2020 13:15 Popes Landing Australia  0.1
14 Mar 2020 03:30 Dirk Hartog Australia  0.1
11 Mar 2020 13:30 Greenough Australia  0.1
14 Mar 2020 12:00 Geraldton Australia  0.1
14 Mar 2020 12:00 Waggrakine Australia  0.1
11 Mar 2020 07:30 Lancelin Australia  0.1
11 Mar 2020 07:30 Seabird Australia  0.1
11 Mar 2020 10:30 Mullalloo Beach Australia  0.1
11 Mar 2020 10:30 North Beach Australia  0.1
11 Mar 2020 10:30 Scarborough Australia  0.1
11 Mar 2020 10:30 Cottesloe Australia  0.1
11 Mar 2020 10:30 Peppermint Grove Australia  0.1
11 Mar 2020 10:30 Swanbourne Australia  0.1
11 Mar 2020 10:30 Claremont Australia  0.1
11 Mar 2020 07:30 Guilderton Australia  0.1
11 Mar 2020 07:30 Two Rocks Australia  0.1
11 Mar 2020 08:00 Kalbarri Australia  0.1
11 Mar 2020 07:15 Cervantes Australia  0.1
11 Mar 2020 07:30 Yanchep Australia  0.1
11 Mar 2020 07:30 Quinns Rock Australia  0.1
11 Mar 2020 07:30 Illawong Australia  0.1
14 Mar 2020 02:00 Carnarvon Australia  0.1
11 Mar 2020 07:15 Green Head Australia  0.1
11 Mar 2020 07:15 Leeman Australia  0.1
11 Mar 2020 07:15 Jurien Australia  0.1
12 Mar 2020 21:15 Chilachap Indonesia  0.1
12 Mar 2020 21:15 Adipala Indonesia  0.1
12 Mar 2020 21:15 Binangoen Indonesia  0.1

Calculation folder at this link