Overall Green alert Tropical Cyclone for TAMMY-23
in Virgin Islands British, Antigua and Barbuda, Montserrat, Guadeloupe, Bermuda, Barbados, Dominica

Event summary

Tropical Cyclone TAMMY-23 can have a low humanitarian impact based on the maximum sustained wind speed, exposed population and vulnerability.

GDACS ID TC 1001025
Name TAMMY-23
From - To 18 Oct - 29 Oct
Exposed countries Virgin Islands British, Antigua and Barbuda, Montserrat, Guadeloupe, Bermuda, Barbados, Dominica
Exposed population 30 thousand in Category 1 or higher
Maximum wind speed 167 km/h Category 2
Maximum storm surge 0.4 m (21 Oct 18:00 UTC)
Vulnerability Low (Antigua & Barbuda)

GDACS Score

For more info on GDACS alert score click here.
Wind Storm surge Rainfall GDACS score
GDACS NOAA 65 km/h 0.4 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 209 km/h 0.7 m 1139 mm 0.5
GFS 151 km/h 0.8 m 783 mm 0.5
ECMWF 79 km/h 0.8 m 622 mm 0.5
Maximum expected impact (wind, storm surge and rainfall) using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Lesser Antilles, Virgin Islands, Puerto Rico - Tropical cyclone TAMMY (ECHO 20 Oct 2023)Fri, 20 Oct 2023 10:08

  • A new tropical cyclone named TAMMY formed over the Atlantic Ocean on 18 October and started moving north-west toward the Leeward Islands, the northern part of the Lesser Antilles, streghtening. On 20 October at 6.00 UTC, its centre was located over the Ocean approximately 420 km south-east of the Guadeloupe Island, with maximum sustained winds of 95 km/h (tropical storm).
  • TAMMY is forecast to continue northwestward over the Ocean, strenghtening, and to pass very close to Guadeloupe and Antigua and Barbuda on 21 October in the afternoon and 22 October very early in the morning (UTC), with maximum sustained winds up to 130 km/h (Cat. 1 Hurricane).
  • Over the next 48 hours, heavy rainfall, strong winds and storm surge are forecast over the Leeward Islands, the northern Windward Islands, the Virgin Islands and Puerto Rico. NOAA has issued a hurricane watch over the northern Leeward Islands.
TAMMY-23 - UNITAR-UNOSAT ActivationTue, 24 Oct 2023 10:08

UNITAR-UNOSAT Potentially Damaged Buildings has been activated
Detailed event map. European Union, 2024. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Updates on volcanic activity (Smithsonian)

Latest media headlines

Tempête, coup de vent, ouragan… quelles sont les différences? 10/31/2023 4:42:00 PM.

« Le vent souffle sur les plaines de la Bretagne armoricaine », rappait le groupe Manau dans les années 2000. Cela sera d’autant plus vrai avec le passage de la tempête Ciaran ce jeudi 2 novembre. Des rafales de vent de 170km/h sont annoncé
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JCI St. Maarten hosts Dutch Caribbean National Convention 10/31/2023 4:00:00 PM.

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JCI St. Maarten hosts Dutch Caribbean National Convention 10/31/2023 3:40:00 PM.

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Fermeture partielle de la RD6 : un calvaire pour les Vieux-Fortains gu.. 10/30/2023 4:27:00 PM.

Depuis plusieurs jours, la route départementale 6 n’est ouverte qu’en journée, entre Vieux-Fort et Gourbeyre. La faute aux intempéries et, surtout, aux dizaines de milliers de tonnes alluvions descendues de la carrière qui surplombe le site
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Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (40), (2), WMO (1), INFORM (2),