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 ECMWF
Exposed countries
Exposed population No people in Category 1 or higher
Maximum wind speed 104 km/h
Maximum storm surge 0.3 m (24 Jan 21:45 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
ECMWF Current 83 km/h 0.2 m 456 mm 0.5
ECMWF Overall 104 km/h 0.3 m 632 mm 0.5

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

Wind

104 km/h

No people by wind speeds of Tropical Storm strength or above



Wind exposed population

No exposed population (in Tropical Storm or higher) based on the bulletin of 27 Jan 2020 12:00 UTC (Overall situation)

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 00:00 76 - - - - - - -
GREEN 2 24 Jan 2020 12:00 83 - - - - - - -
GREEN 3 25 Jan 2020 00:00 101 - - - - - - -
GREEN 4 25 Jan 2020 12:00 97 - - - - - - -
GREEN 5 26 Jan 2020 00:00 104 - - - - - - -
GREEN 6 26 Jan 2020 12:00 97 - - - - - - -
GREEN 7 27 Jan 2020 00:00 79 - - - - - - -
GREEN 8 27 Jan 2020 12:00 83 - - - - - - -




Impact estimation for the next 72h





Rain exposed population

Estimations based on the bulletin of 27 Jan 2020 12:00 UTC (Overall situation)
LevelCountryPopulation 
100-250 mmReunion389476 
50-100 mmMauritius, Reunion1379586
+
Mauritius946302 
Reunion433284 

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 00:00 265 - - - - - - -
Blue 2 24 Jan 2020 12:00 128 - - - - - - -
Blue 3 25 Jan 2020 00:00 274 Few people
- - - - Reunion
Blue 4 25 Jan 2020 12:00 359 - - - - - - -
Blue 5 26 Jan 2020 00:00 296 - - - - - - -
Blue 6 26 Jan 2020 12:00 178 - - - - - - -
Blue 7 27 Jan 2020 00:00 194 - - - - - - -
Blue 8 27 Jan 2020 12:00 456 - - - - - - -




Impact estimation for the next 72h

StormSurge

0.3 m

The maximum Storm surge height is  0.3m in Trou aux Biches, Mauritius. This height is estimated for 24 Jan 2020 21:45 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 27 Jan 2020 12:00 UTC (Overall situation)
Alert Date (UTC) Name Country Storm surge height (m)
24 Jan 2020 21:45 Trou aux Biches Mauritius  0.3
24 Jan 2020 21:45 Saint-Antoine Mauritius  0.3
28 Jan 2020 13:00 Riviere du Rempart Mauritius  0.2
28 Jan 2020 13:00 Maheboug Mauritius  0.2
28 Jan 2020 13:00 Grande Reviere Sud Est Mauritius  0.2
25 Jan 2020 14:00 La Ferme Mauritius  0.2
25 Jan 2020 14:00 Port Mathurin Mauritius  0.2
24 Jan 2020 21:45 Port Louis Mauritius  0.2
24 Jan 2020 21:45 Black River Mauritius  0.2
24 Jan 2020 21:30 Riche-en-Eau Mauritius  0.2
24 Jan 2020 21:45 Choisy Mauritius  0.1
24 Jan 2020 21:45 Chemin Grenier Mauritius  0.1
24 Jan 2020 14:45 Saint-Marie Reunion  0.1
24 Jan 2020 14:45 Sainte-Suzanne Reunion  0.1
24 Jan 2020 14:45 Saint-Andre Reunion  0.1
24 Jan 2020 14:45 Bras-Panon Reunion  0.1
24 Jan 2020 14:45 Saint-Benoit Reunion  0.1
25 Jan 2020 00:45 Souillac Mauritius  0.1
24 Jan 2020 14:45 Saint-Paul Reunion  0.1
24 Jan 2020 14:45 Trois Bassins Reunion  0.1
24 Jan 2020 14:45 Le Port Reunion  0.1
24 Jan 2020 14:45 La Possession Reunion  0.1
25 Jan 2020 01:15 Saint-Denis Reunion  0.1
24 Jan 2020 15:00 Sainte-Rose Reunion  0.1
24 Jan 2020 15:00 Cascades Reunion  0.1
28 Jan 2020 09:00 Point Marianne British Indian Ocean Territory  0.1
28 Jan 2020 09:00 East Point Plantation British Indian Ocean Territory  0.1
24 Jan 2020 14:45 Saint-Leu Reunion  0.1
24 Jan 2020 14:45 Les Avirons Reunion  0.1
24 Jan 2020 14:45 Etang Sale Reunion  0.1
28 Jan 2020 12:45 Saint-Louis Reunion  0.1
28 Jan 2020 12:45 Saint-Pierre Reunion  0.1
28 Jan 2020 12:45 Petite Ile Reunion  0.1
28 Jan 2020 12:45 Saint-Joseph Reunion  0.1
28 Jan 2020 12:45 Saint-Philippe Reunion  0.1

Calculation folder at this link