Isaac was about 220 miles east of Dominica, an island on the eastern rim of the Caribbean.
Subtropical Storm Joyce is located 945 miles west-southwest of the Azores and is moving to the southwest at 6 mph (9 km/h).
Tropical Storm Isaac, which passed between the Caribbean island nations of Dominica and Martinique late Wednesday and early Thursday, is now moving nearly due west across the eastern Caribbean Sea.
Met Éireann said: "Current indications are that (ex-) tropical storm Helene will approach Ireland's south coast during Tuesday".
Tornadoes: Tornadoes will be possible along and to the right of the track of Florence, especially in South Carolina, Saturday & Sunday.
Rainfall totals of 1 to 2 inches with maximum amounts of 3 inches are possible across the remainder of Puerto Rico, the Virgin Islands, the Leeward Islands, and the northern Windward Islands.
The storm is now around 530 miles southeast of Cape Fear, North Carolina, and is moving west-northwest at 17 mph.
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Maximum sustained winds have decreased to near 40 miles per hour (65 km/h) with higher gusts.
"Overcast with moderate to heavy rain for south-west England, Wales, Ireland, north-west England and Scotland with fresh to strong and gusty southerly winds through the afternoon and evening".
The Met Office in the United Kingdom said Helene could also hit the south-western corners of the United Kingdom, with south Wales and the Cornish peninsula expected to bear the brunt of any storm-like weather.
Tropical storm warnings were in effect for Martinique, Dominica and Guadeloupe, while watches were in effect for Montserrat, St. Kitts and Nevis, Antigua, and Saba and St. Eustatius.
Its warning, in force between 6pm on Monday and midday on Tuesday, said "very strong winds" could pose the risk of "injuries and danger to life" because of flying debris. Coastal areas in both Carolinas have taken steps to evacuate residents and tourists, including a mandatory evacuation in SC. Forecasters also were tracking two other disturbances.
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