Storm Helene to batter NI as severe weather warning is issued

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Tropical Storm Isaac is moving west in the Caribbean and will regain enough strength to become a hurricane again, forecasters said Tuesday. It should dissipate by early next week, the hurricane center said.

As Florence nears the east coast, meteorologists are focused on two key factors: ocean temperatures and wind sheer (the difference in speeds at the upper and lower parts of the storm).

- Isaac is now a strong tropical storm over the Central Tropical Atlantic. "This storm is extremely risky".

Maximum sustained winds were nearly 85 miles per hour Monday morning, the hurricane center said.

Hurricane Florence isn't the only storm threatening lives and property around the world. A NOAA hurricane hunter aircraft will soon fly through the centre of Isaac, and will provide a better assessment of the intensity of the tropical storm and the extent of its winds.

At 1100 p.m. AST (0300 UTC), the center of Tropical Storm Joyce was located near latitude 32.9 north, longitude 44.4 west. Joyce is moving toward the south-southwest near 7 miles per hour (11 km/h), and this general motion is expected to continue tonight.

He said as far as the National Emergency Planning Organisation is concerned "we are taking no chances and we are leaving no stone unturned in respect to the preparation of the state, the country and its citizens for this incoming weather system".

Rain projections also increased, with some locations along the North Carolina coast now expected to get up to 40 inches.

Around six o'clock this morning, the center of Isaac passed 150 miles to the north of Barbados.

A Tropical Storm Watch which had been issued for St. Kitts and Nevis, Montserrat, Barbuda and Antigua was also expected to be discontinued by Thursday evening.

Forecasters say Florence is expected to blow ashore late Thursday or early Friday, then slow down and dump 1 to 2½ feet of rain that could cause flooding well inland and wreak environmental havoc by washing over industrial waste sites and hog farms.

President Donald Trump declared states of emergency for North and SC and Virginia, opening the way for federal aid.