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 122 km/h
Maximum storm surge 0.3 m (27 Jan 04:45 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
HWRF Current 86 km/h 0.3 m 238 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 exposed population

Estimations based on the bulletin of 27 Jan 2020 00:00 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 76 -
- - - - - Mauritius
GREEN 5 25 Jan 2020 18:00 90 - - - - - - -
GREEN 6 26 Jan 2020 00:00 101 - - - - - - -
GREEN 7 26 Jan 2020 06:00 108 - - - - - - -
GREEN 8 26 Jan 2020 12:00 122 - - - - - - -
GREEN 9 26 Jan 2020 18:00 79 - - - - - - -
GREEN 10 27 Jan 2020 00:00 86 - - - - - - -




Impact estimation for the next 72h

Rainfall

457 mm

Up to 1 thousand can be affected by rain higher than 100mm (see SSHS)





Rain exposed population

Estimations based on the bulletin of 27 Jan 2020 00:00 UTC
LevelCountryPopulation 
100-250 mmReunion1239 
50-100 mmReunion34645 

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 12:00 251 - - - - - - -
Blue 5 25 Jan 2020 18:00 290 - - - - - - -
Blue 6 26 Jan 2020 00:00 152 - - - - - - -
Blue 7 26 Jan 2020 06:00 248 - - - - - - -
Blue 8 26 Jan 2020 12:00 211 - - - - - - -
Blue 9 26 Jan 2020 18:00 132 - - - - - - -
Blue 10 27 Jan 2020 00:00 238 - - - - - - -




Impact estimation for the next 72h

StormSurge

0.3 m

The maximum Storm surge height is  0.3m in La Ferme, Mauritius. This height is estimated for 27 Jan 2020 04:45 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 00:00 UTC
Alert Date (UTC) Name Country Storm surge height (m)
27 Jan 2020 04:45 La Ferme Mauritius  0.3
27 Jan 2020 04:45 Port Mathurin Mauritius  0.3
27 Jan 2020 08:15 Trou aux Biches Mauritius  0.2
27 Jan 2020 08:15 Saint-Antoine Mauritius  0.2
27 Jan 2020 17:00 La Possession Reunion  0.2
27 Jan 2020 17:00 Saint-Denis Reunion  0.2
27 Jan 2020 17:00 Saint-Marie Reunion  0.2
27 Jan 2020 17:00 Sainte-Suzanne Reunion  0.2
27 Jan 2020 17:00 Saint-Andre Reunion  0.2
26 Jan 2020 20:45 Riviere du Rempart Mauritius  0.2
26 Jan 2020 20:45 Maheboug Mauritius  0.2
26 Jan 2020 20:45 Grande Reviere Sud Est Mauritius  0.2
27 Jan 2020 16:45 Point Marianne British Indian Ocean Territory  0.1
27 Jan 2020 16:45 East Point Plantation British Indian Ocean Territory  0.1
25 Jan 2020 02:30 Riche-en-Eau Mauritius  0.1
25 Jan 2020 02:15 Souillac Mauritius  0.1
25 Jan 2020 02:15 Chemin Grenier Mauritius  0.1
29 Jan 2020 14:45 Bras-Panon Reunion  0.1
29 Jan 2020 14:45 Saint-Benoit Reunion  0.1
25 Jan 2020 02:15 Choisy Mauritius  0.1
25 Jan 2020 02:45 Port Louis Mauritius  0.1
28 Jan 2020 13:45 Saint-Paul Reunion  0.1
28 Jan 2020 13:45 Saint-Leu Reunion  0.1
28 Jan 2020 13:45 Trois Bassins Reunion  0.1
28 Jan 2020 13:45 Le Port Reunion  0.1
27 Jan 2020 17:00 Sainte-Rose Reunion  0.1
27 Jan 2020 17:00 Cascades Reunion  0.1
25 Jan 2020 02:30 Black River Mauritius  0.1

Calculation folder at this link