Overall Green alert Tropical Cyclone for DIANE-20
in Mauritius
GDACS
Impact Single TC
Impact all weather systems in the area
.

Impact

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

Meteorological source GDACS (JTWC)
Exposed countries Mauritius
Exposed population No people in Category 1 or higher
Maximum wind speed 83 km/h
Maximum storm surge 0.2 m (24 Jan 21:00 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
GDACS Current 83 km/h 0.1 m n.a. 0.5
GDACS Overall 83 km/h 0.2 m n.a. 0.5

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

Wind

83 km/h Current

Up to 1.3 million people in Tropical storm (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm
Population in
Cat. 1 or higher
Countries
Green 1 24 Jan 2020 18:00 83 1.3 million No people Mauritius
Green 2 25 Jan 2020 06:00 93 1.3 million No people Mauritius
Green 3 25 Jan 2020 18:00 93 1.3 million No people Mauritius
Green 4 26 Jan 2020 06:00 83 1.3 million No people Mauritius

Bulletin Timeline

Alert Date (UTC) Category Max winds
(km/h)
Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon) Countries
GREEN
1 24 Jan 2020 18:00 Tropical storm 74 490000 people no people -19.6, 56.9 Mauritius
GREEN
2 25 Jan 2020 06:00 Tropical storm 83 no people no people -20.6, 60.3
GREEN
3 25 Jan 2020 18:00 Tropical storm 83 44000 people no people -22, 64 Mauritius
GREEN
4 26 Jan 2020 06:00 Tropical storm 83 no people no people -25, 68.3
GREEN
4 26 Jan 2020 18:00 Tropical storm 83 no people no people -25.8, 70.2
GREEN
4 27 Jan 2020 06:00 Tropical storm 74 no people no people -26.4, 70.8
GREEN
4 27 Jan 2020 18:00 Tropical storm 65 no people no people -27.2, 70.6
GREEN
4 28 Jan 2020 06:00 Tropical depression 56 no people no people -28.5, 69.8
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.



Exposed population

Countries

Country
Mauritius

Provinces

Region Province Country Population
Mauritius Mauritius 1 million people

Populated places

Name Region Province Country City class Population
Port Louis Mauritius Capital 150000 people

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft)
Rodrigues Plaine Corail RRG 40 Civ. Paved Yes 3300
Plaisance International MRU 57 Civ. Paved Yes 9900

Ports

Name LOCODE Country
Port Mathurin Mauritius
Mahebourg Mauritius
Port Louis MUPLU Mauritius

Rainfall

Rainfall accumulation of the past 24h, as detected by the Global Precipitation Measurement mission of NASA. For more information, see https://www.nasa.gov/mission_pages/GPM/main/index.html.

...

StormSurge

0.2 m

The maximum Storm surge height is  0.1m in Saint-Antoine, Mauritius. This height is estimated for 24 Jan 2020 21:00 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.

Locations affected by Storm surge (7 locations). Calculation based on advisory number 5 of 26 Jan 2020 18:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)
24 Jan 2020 21:00 Saint-Antoine Mauritius  0.1
24 Jan 2020 21:00 Riviere du Rempart Mauritius  0.1
24 Jan 2020 20:00 Port Louis Mauritius  0.1
24 Jan 2020 21:00 Trou aux Biches Mauritius  0.1
24 Jan 2020 22:00 Grande Reviere Sud Est Mauritius  0.1
24 Jan 2020 22:00 Riche-en-Eau Mauritius  0.1
24 Jan 2020 22:00 Maheboug Mauritius  0.1