Overall Green alert Tropical Cyclone for ISAAC-18
in Montserrat, Guadeloupe, Antigua and Barbuda, Dominica, Martinique, Saint Vincent and the Grenadines, Saint Lucia, Barbados

Current storm status

This tropical cyclone is expected to have a low humanitarian impact based on the storm strength and the affected population in the past and forecasted path.

Population affected by Category 1 (120 km/h) wind speeds or higher is: No people affected
Maximum windspeed: 120 km/h
Vulnerability of affected countries: High

Bulletin Timeline

Advisory Alert color Date (UTC) Category Wind speed Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon)
1
GREEN
07 Sep 2018 21:00 Tropical depression 56 km/h (34 mph) no people no people 13.6, -34.9
2
GREEN
08 Sep 2018 03:00 Tropical depression 56 km/h (34 mph) no people no people 13.9, -34.9
3
GREEN
08 Sep 2018 09:00 Tropical depression 56 km/h (34 mph) no people no people 14.3, -35.4
4
GREEN
08 Sep 2018 15:00 Tropical depression 56 km/h (34 mph) no people no people 14.6, -36
5
GREEN
08 Sep 2018 21:00 Tropical storm 65 km/h (40 mph) no people no people 14.5, -36.6
6
GREEN
09 Sep 2018 03:00 Tropical storm 83 km/h (52 mph) no people no people 14.4, -37.5
7
GREEN
09 Sep 2018 09:00 Tropical storm 83 km/h (52 mph) no people no people 14.5, -38.1
8
GREEN
09 Sep 2018 15:00 Tropical storm 102 km/h (63 mph) no people no people 14.3, -39.1
9
GREEN
09 Sep 2018 21:00 Tropical storm 111 km/h (69 mph) no people no people 14.5, -40.3
10
GREEN
10 Sep 2018 03:00 Category 1 120 km/h (75 mph) no people no people 14.5, -41.6
11
GREEN
10 Sep 2018 09:00 Category 1 120 km/h (75 mph) no people no people 14.7, -42.7
12
GREEN
10 Sep 2018 15:00 Category 1 120 km/h (75 mph) no people no people 14.7, -43.9
13
GREEN
10 Sep 2018 21:00 Category 1 120 km/h (75 mph) no people no people 14.4, -45
14
GREEN
11 Sep 2018 03:00 Tropical storm 111 km/h (69 mph) no people no people 14.5, -46.9
15
GREEN
11 Sep 2018 09:00 Tropical storm 111 km/h (69 mph) no people no people 14.6, -48.1
16
GREEN
11 Sep 2018 15:00 Tropical storm 111 km/h (69 mph) no people no people 14.6, -49.7
17
GREEN
11 Sep 2018 21:00 Tropical storm 111 km/h (69 mph) no people no people 14.6, -51.3
18
GREEN
12 Sep 2018 03:00 Tropical storm 102 km/h (63 mph) no people no people 14.5, -52.3
19
GREEN
12 Sep 2018 09:00 Tropical storm 93 km/h (57 mph) no people no people 14.5, -53.5
20
GREEN
12 Sep 2018 15:00 Tropical storm 93 km/h (57 mph) no people no people 15, -54.7
21
GREEN
12 Sep 2018 21:00 Tropical storm 93 km/h (57 mph) <1000 people no people 15.4, -56.6
22
GREEN
13 Sep 2018 03:00 Tropical storm 83 km/h (52 mph) 1.1 million people no people 15.3, -58
23
GREEN
13 Sep 2018 09:00 Tropical storm 74 km/h (46 mph) 1.4 million people no people 15.4, -59.7
24
GREEN
13 Sep 2018 15:00 Tropical storm 74 km/h (46 mph) 1.2 million people no people 14.9, -61.8
25
GREEN
13 Sep 2018 21:00 Tropical storm 65 km/h (40 mph) no people no people 14.9, -63.2
26
GREEN
14 Sep 2018 03:00 Tropical storm 65 km/h (40 mph) no people no people 14.9, -64.4
27
GREEN
14 Sep 2018 09:00 Tropical depression 56 km/h (34 mph) no people no people 15, -65.5
28
GREEN
14 Sep 2018 15:00 Tropical depression 56 km/h (34 mph) no people no people 14.9, -67.3
29
GREEN
14 Sep 2018 21:00 Tropical storm 65 km/h (40 mph) no people no people 15.3, -68.2
29
GREEN
15 Sep 2018 06:00 Tropical storm 65 km/h (40 mph) no people no people 15.4, -70.1
29
GREEN
15 Sep 2018 18:00 Tropical storm 65 km/h (40 mph) no people no people 15.4, -72.2
29
GREEN
16 Sep 2018 06:00 Tropical storm 65 km/h (40 mph) no people no people 15.7, -74.2
29
GREEN
16 Sep 2018 18:00 Tropical depression 56 km/h (34 mph) no people no people 16.2, -76.3
29
GREEN
17 Sep 2018 18:00 Tropical depression 46 km/h (29 mph) no people no people 17.5, -80
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.

Wind

Up to no people can be affected by wind speeds of cyclone strength or above.

StormSurge

The maximum Storm surge height is  0.2m in Le Bourg, Guadeloupe. This height is estimated for 13 Sep 2018 17:00:00.

Locations affected by Storm surge (18 locations). Calculation based on advisory number 21 of 12 Sep 2018 21:00:00. (Simulation using 0.5 minute resolution)

Date Name Country Alert Storm surge height (m)
13 Sep 2018 17:00:00 Le Bourg Guadeloupe  0.2m
13 Sep 2018 16:00:00 Baie-Mahault Guadeloupe  0.2m
13 Sep 2018 16:00:00 Grand-Bourg Guadeloupe  0.1m
13 Sep 2018 15:00:00 Castle Bruce Dominica  0.1m
13 Sep 2018 17:00:00 Sainte-Anne Guadeloupe  0.1m
13 Sep 2018 17:00:00 Capesterre Guadeloupe  0.1m
13 Sep 2018 15:00:00 Pointe-a-Pitre Guadeloupe  0.1m
13 Sep 2018 18:00:00 Basse-Terre Guadeloupe  0.1m
16 Sep 2018 21:00:00 Brazalitta Jamaica  0.1m
16 Sep 2018 21:00:00 Mahoe Gardens Jamaica  0.1m
13 Sep 2018 16:00:00 Saint-Louis Guadeloupe  0.1m
13 Sep 2018 15:00:00 Capesterre Guadeloupe  0.1m
13 Sep 2018 17:00:00 Portsmouth Dominica  0.1m
13 Sep 2018 16:00:00 Baroui Dominica  0.1m
13 Sep 2018 18:00:00 Saint-Claude Guadeloupe  0.1m
13 Sep 2018 19:00:00 Bouillante Guadeloupe  0.1m
13 Sep 2018 16:00:00 Marigot Dominica  0.1m
13 Sep 2018 15:00:00 La Plaine Dominica  0.1m

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.

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