This report provides an update on Tropical Cyclone Isaac and its impact on CCRIF territories in the Central Caribbean. After impacting the Eastern Caribbean on 22 August and affecting Dominica (as reported in the earlier CCRIF briefing), Tropical Storm Isaac entered the Caribbean Sea. At 1500 UTC on 24 August, Isaac was located 185 miles (300 km) south-southeast of Port-au-Prince, Haiti with maximum sustained winds of 60 mph (95 km/h).

On 17 August 2012 the National Hurricane Centre released its first weather outlook on a tropical wave system which had formed off the coast of Africa. By the following day the system appeared to be better organised as it moved towards favourable environmental conditions for development. At 0900 UTC on 21 August 2012 this system was classified as a Tropical Depression (#9) and by 2100 UTC it was upgraded to Tropical Storm Isaac.

On 17 August 2012 the National Hurricane Centre released its first weather outlook on a tropical wave system which had formed off the coast of Africa. By the following day the system appeared to be better organised as it moved towards favourable environmental conditions for development. At 0900 UTC on 21 August 2012 this system was classified as a Tropical Depression (#9) and by 2100 UTC it was upgraded to Tropical Storm Isaac.

On 30 July 2012 the National Hurricane Centre released its first weather outlook on a tropical wave system which had formed off of the coast of Africa 3 days earlier and now appeared to be well defined. Convection in this system became better organised and at approximately 2100 UTC on 1 August it intensified to form the fifth Tropical Depression of the year situated approximately 810 miles (1,305 km) east of the Lesser Antilles, moving in a WNW direction.

An earthquake of magnitude 5.1 struck of the south western coast of Cuba at 08:43:06 UTC on 15 September 2011. Located at 19.563°N, 78.008°W at a depth of 5 km according to the USGS estimate, the event occurred offshore to the northwest of Jamaica, the closest CCRIF member country. This made the event epicentre 122km north of Montego Bay. There were no reports of damage or loss in Jamaica as a result of this event.

A magnitude 5.0 earthquake occurred in the offshore Martinique region of the Windward Islands on 9 September 2011 at 10:11:24 UTC. According to the United States Geological Survey (USGS), the estimated coordinates for this event were 14.956°N, 61.310°W with the event having an estimated depth of 150.6km. The closest CCRIF member country affected was Dominica, with estimations placing the earthquake epicentre approximately 38km SSE of the capital Roseau.

In mid-August 2011, a westward moving tropical wave entered the Caribbean Sea. It eventually gained enough organisation to be classified as Tropical Depression Eight on 18 August. As reported by the National Hurricane Centre (NHC), this system evolved into a Tropical Storm on 19 August at approximately 0600 UTC when it was situated 250km east of Roatan, Honduras. Now officially recognised as the eighth cyclone of the 2011 Atlantic hurricane season, the name Harvey was assigned to this storm.

As reported by the National Hurricane Centre (NHC), Tropical Cyclone Irene was named as a Tropical Storm east of Dominica on 20 August 2011 and became a Hurricane on 22 August. It is the ninth recognised Tropical Cyclone of the 2011 Atlantic hurricane season.

A magnitude 5.0 earthquake occurred to the east of Saint Lucia at 12:01 am (04:01 am UTC) on 7 August 2011. Initial estimates from the US Geological Survey locate the epicentre of the event at 13.84ºN, 60.31ºW, and at a depth of 38km.

A magnitude 4.7 earthquake struck the southwestern parts of Jamaica at 15:07:07 UTC on 16 May 2011. Initial estimates from the US Geological Survey locate the epicentre of the event at 17.897°N, 77.895°W and the provisional depth assigned to the event is 31.6 km. This location puts the event 62km south of Montego Bay and 117km west of the capital, Kingston.