ISAAC CONTINUES TO WEAKEN…..TROPICAL STORM FORCE WINDS NEARING DOMINICA

BULLETIN #13 issued at 5:00 AM, Thursday September 13, 2018 by the Dominica Meteorological Service.

 

ISAAC CONTINUES TO WEAKEN AT 5 AM…..TROPICAL STORM FORCE WINDS NEARING DOMINICA

At 5am the centre of Tropical Storm Isaac was located near latitude 15.4 degrees north and longitude 59.7 degrees west or about 105 miles east of Dominica. Isaac is moving west at 17 mph (28 km/h). Maximum sustained winds have decreased to 45mph or 75km/h with higher gusts. Tropical storm force winds extend out to 175 miles (280km) from the centre. 

 

 Isaac is under shear and sinking air from the outflow of Florence and the presence of Helene and has continued to weaken. Most of the deep convection has displaced northeast of centre. However, Isaac is still likely to carry tropical storm force winds (40-50 mph) across the Lesser Antilles. On the current forecast track, the centre of Isaac is expected to pass over or near to the northern part of Dominica around noon today. Strongest winds are expected to the north of the centre.

 

A Tropical Storm Warning remains in effect for Dominica at 5am. Residents are advised to keep informed on the progress of this system and to remain vigilant. A deterioration in weather conditions is expected across Dominica as the morning progresses, increasing to pockets of moderate to heavy showers, thunderstorms and winds gusting to tropical storm force. Rough to very rough seas are expected up to Friday.  

 

Current rainfall amount projected for Dominica is between 6 to 8 inches (150 to 200mm) with higher amounts in elevated areas.

 

·         People in areas prone to flooding, landslides and falling rocks are advised to be extremely vigilant and to exercise extreme caution as life threatening flash flooding and mudslides are expected today. A FLOOD WARNING is in effect for Dominica until 6pm Friday September 14, 2018.

 

·         Mariners and other users of the sea should remain extremely cautious. Large waves of up to 19.0ft and dangerous rip-currents will create unsafe conditions for small-craft operators. Sea-bathers should stay out of the water. Coastal flooding is possible in low-lying areas on eastern and northern coasts. A High-Surf Advisory and Small-Craft Warning are in effect until 6pm Friday September 14, 2018.

 

Note that there are no other systems posing an immediate threat to Dominica following Isaac.

 

The next update on Tropical Storm Isaac will be issued by the Dominica Meteorological Service at 8am.