Overall Green alert Tropical Cyclone for GAMMA-20
in Mexico, Cuba

Event summary

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

GDACS ID TC 1000725
Name GAMMA-20
From - To 02 Oct - 06 Oct
Exposed countries Mexico, Cuba
Exposed population No people in Category 1 or higher
Maximum wind speed 111 km/h Tropical storm
Maximum storm surge 1.2 m (05 Oct 07:00 UTC)
Vulnerability Medium (Mexico)

GDACS Score

For more info on GDACS alert score click here.
Wind Storm surge Rainfall GDACS score
GDACS NOAA 56 km/h 1.2 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 223 km/h 0.7 m 524 mm 0.5
GFS 162 km/h 0.9 m 522 mm 0.5
ECMWF 155 km/h 0.8 m 602 mm 0.5
Maximum expected impact (wind, storm surge and rainfall) using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Mexico - Tropical Storm GAMMA (ECHO 05 Oct 2020)Mon, 05 Oct 2020 13:14

  • A new Tropical Storm named GAMMA formed over the northern Caribbean Sea on 2 October, passing over northern Yucatan Peninsula. On 5 October at 6.00 UTC its centre was located approximately 300 km north-east of Merida city (Yucatan State, Mexico), with maximum sustained winds of 95 km/h. On 4 October, red Alert was issued in Honduras for 48 hours in 4 departments.
  • GAMMA is forecast to move south-west along the coast of northern Yucatan on 5-6 October before making landfall north of Campeche City (Campeche State) on 7 October.
  • Heavy rain, strong winds and storm surge are forecast over the Yucatan Peninsula, Belize, Honduras, Guatemala, El salvador, and far western Cuba on 5-7 October.
  • A tropical storm warning has been issued for northern Yucatan Peninsula.
Mexico - Tropical Storm GAMMA (ECHO 06 Oct 2020)Tue, 06 Oct 2020 13:01

  • Post-Tropical Cyclone GAMMA was located approximately 24 km east-northeast of Río Lagartos City (Yucatan State, Mexico) on 6 October, with maximum sustained winds of 56 km/h.
  • 6 people died in Mexico following its passage (2 in Tabasco State and 4 in Chiapas State) and 3,500  have been evacuated, according to media reports.
  • GAMMA is forecast to move south-west and to make landfall over the northern coast of Yucatan State before dissipating on 7 October.
  • Heavy rain is expected across portions of Yucatan, Campeche, and Tabasco States.
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

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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 (38), (2), DesInventar (1), WMO (1), INFORM (2),