Overall Orange alert Tropical Cyclone for ISAIAS-20
in United States, Bahamas, Dominican Republic, Puerto Rico, Haiti, Virgin Islands U.S., Turks and Caicos Islands, Virgin Islands British, Cuba, Anguilla, Aruba, Netherlands Antilles, Saint Kitts and Nevis, Venezuela, Colombia, Montserrat, Antigua and Barbuda, Guadeloupe, Martinique, Saint Lucia, Saint Vincent and the Grenadines, Grenada, Barbados, Trinidad and Tobago, Dominica, Jamaica

Event summary

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

GDACS ID TC 1000686
Name ISAIAS-20
From - To 28 Jul - 04 Aug
Exposed countries United States, Bahamas, Dominican Republic, Puerto Rico, Haiti, Virgin Islands U.S., Turks and Caicos Islands, Virgin Islands British, Cuba, Anguilla, Aruba, Netherlands Antilles, Saint Kitts and Nevis, Venezuela, Colombia, Montserrat, Antigua and Barbuda, Guadeloupe, Martinique, Saint Lucia, Saint Vincent and the Grenadines, Grenada, Barbados, Trinidad and Tobago, Dominica, Jamaica
Exposed population 920 thousand in Category 1 or higher
Maximum wind speed 139 km/h, Category 1
Maximum storm surge 1.9 m (04 Aug 05:00 UTC)
Vulnerability Low (The Bahamas)

GDACS Score

For more info on GDACS alert score click here.
+ Wind Storm surge Rainfall GDACS score
GDACS 139 km/h 1.9 m n.a. 1.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 158 km/h 1.5 m 477 mm 0.5
GFS 144 km/h 1.4 m 428 mm 0.5
ECMWF 104 km/h 1.3 m 443 mm 0.5
Beta Version - All weather systems in the area: maximum expected impact (wind, storm surge, rainfall)
Maximum expected impact (wind, storm surge and rainfall) using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
The Caribbean, USA - Tropical Cyclone ISAIAS update (ECHO 03 Aug 2020)Mon, 03 Aug 2020 13:06

  • Tropical Cyclone ISAIAS passed over the Bahamas on 31 July - 2 August as a Category 1 Hurricane. On 3 August at 6.00 UTC, its centre was located just off the coast of Florida, approximately 230 km south-east of Jacksonville, with maximum sustained winds of 110 km/h (tropical storm).
  • 27 people were evacuated in the Bahamas, more than 5,500 people in the Dominican Republic, with 1,300 houses damaged there, and 100 houses damaged in eastern Cuba.
  • ISAIAS will continue north-east along the Georgia and South Carolina coast with maximum sustained winds of 110 km/h, before making landfall over southern North Carolina, on 4 August, as a tropical storm.
  • Heavy rain, strong winds, and storm surge are forecast over Florida, Georgia and the Carolinas on 3-4 August.
  • A storm surge warning is in effect for coastal areas of South Carolina and southern North Carolina, and a tropical storm warning over coastal Florida, Georgia, the Carolinas, Virginia, Maryland, and Delaware.
The Caribbean, USA - Tropical Cyclone ISAIAS update (ECHO 31 Jul 2020)Fri, 31 Jul 2020 13:09

  • On 30 July, Tropical Cyclone ISAIAS passed over central and northern Dominican Republic and north-eastern Haiti. On 31 July, its centre was located over the sea, very close to the southern Turks and Caicos and the far south of the Bahamas with maximum sustained wind of 130 km/h (Category 1 Hurricane).
  • In western and south-western Puerto Rico, media report as of 31 July, around 450,000 people without electricity due to widespread flooding and some localized landslides. Local authorities prepared more than 300 shelters for emergency use. In Haiti, UN OCHA reports as of 30 July, 37 damaged houses mainly across northern and central Departments.
  • ISAIAS is forecast to continue  north-westward over the Bahamas on 31 July - 1 August, with maximum sustained wind of 130-140 km/h (Category 1 Hurricane). 
  • Heavy rain, strong wind and storm surge are forecast over the Dominican Republic, Haiti, Turks and Caicos, the Bahamas and southern Florida 31 July - 1 August, as well as over central-northern Florida, coastal areas of Georgia and the Carolinas on 2-3 August.
  • NOAA has issued a hurricane warning over most of the Bahamas, and a tropical storm warning over the coastal areas of the Dominican Republic, northern Haiti, and Turks and Caicos.
Detailed event map. European Union, 2015. 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

Articles: 3079 | About casualties: 29 | Last hour: 0

Multiple fires break out as Hurricane Isaias brings down power and wre ... Tue, 04 Aug 2020 11:56:00 +0200.

Maryland. Meteorologists expect Isaias to dump at least 6 inches of rain, with some parts of Maryland possibly getting more. Tropical storm warnings are in effect for Anne Arundel County as well as the Baltimore area, Southern Maryland and
...(more)
Etats-Unis : redevenu un ouragan, Isaias s’abat sur la Caroline du Nor ... Tue, 04 Aug 2020 11:51:00 +0200.

© AFP/Sean Rayford Les vagues poussées par les vents ont submergé dans la nuit de lundi à mardi les boulevards de Myrtle beach, en Caroline du Sud. Des vents, des pluies diluviennes, alors que la nuit tombait. L'ouragan Isaias s'est abattu
...(more)
Isaias moving away, spotty showers continueTue, 04 Aug 2020 11:49:00 +0200.

Isaias made landfall Monday night near Ocean Isle Beach, NC as a category 1 hurricane with winds near 85 mph. It will continue northeast up to the east coast, producing widespread rain and tropical storm force winds as well as a tornado thr
...(more)
Tropical Storm Isaias makes landfall with strong windsTue, 04 Aug 2020 11:49:00 +0200.

Tropical Storm Isaias hit the US east coast late on Monday with maximum sustained winds of 140 kilometers per hour (km/h), according to the US national hurricane service NHC. Washington, 4 August 2020 (dpa/MIA) — Tropical Storm Isaias hit
...(more)

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: JRC (35), (1), WMO (1), INFORM (2),