Overall Green alert Tropical Cyclone for DIANE-20
in Mauritius

Impact

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

Meteorological source HWRF
Exposed countries Mauritius
Exposed population No people in Category 1 or higher
Maximum wind speed 76 km/h
Maximum storm surge 0.2 m (25 Jan 14:30 UTC)
Vulnerability Medium (Mauritius)

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 76 km/h 0.2 m 251 mm 0.5
HWRF Overall 122 km/h 0.3 m 457 mm 0.5

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

Wind

122 km/h

Up to 30 thousand can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population

Estimations based on the bulletin of 25 Jan 2020 12:00 UTC
CategoryCountryPopulation 
Tropical StormMauritius27648 

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 24 Jan 2020 18:00 0 - - - - - - -
GREEN 2 25 Jan 2020 00:00 79 - - - - - - -
GREEN 3 25 Jan 2020 06:00 79 - - - - - - -
GREEN 4 25 Jan 2020 12:00 130 -
- - - - - Mauritius




Impact estimation for the next 72h





Rain exposed population

No exposed population (greater than 50mm) based on the bulletin of 25 Jan 2020 12:00 UTC

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 24 Jan 2020 18:00 0 - - - - - - -
Blue 2 25 Jan 2020 00:00 265 -
- - - - - Reunion
Blue 3 25 Jan 2020 06:00 286 - - - - - - -
Blue 4 25 Jan 2020 12:00 618 - - - - - - -




Impact estimation for the next 72h

StormSurge

0.2 m

The maximum Storm surge height is  0.2m in Trou aux Biches, Mauritius. This height is estimated for 25 Jan 2020 14:30 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 25 Jan 2020 12:00 UTC
Alert Date (UTC) Name Country Storm surge height (m)
25 Jan 2020 14:30 Trou aux Biches Mauritius  0.2
25 Jan 2020 14:30 Saint-Antoine Mauritius  0.2
25 Jan 2020 14:30 Riviere du Rempart Mauritius  0.2
25 Jan 2020 17:45 La Ferme Mauritius  0.1
25 Jan 2020 17:45 Port Mathurin Mauritius  0.1

Calculation folder at this link