Met Office: Isaac now a weak tropical storm

Olive Hawkins
September 15, 2018

Florence is lashing the state with "heavy rainbands with tropical-storm-force winds spreading across the Outer Banks and Coastal Southeastern North Carolina", the briefing said. "Maximum sustained winds remain near 90 miles per hour (150 km/h) with higher gusts".

Given the lack of deep convection to sustain the cyclone, continual gradual weakening is expected.

The NHC expects Isaac to move near or over the central Lesser Antilles on Thursday, move into the Eastern Caribbean Sea Thursday night, and move into the central Caribbean Sea by the weekend.

The US National Hurricane Centre in its 8 a.m. tropical storm update reported Tropical Storm Isaac's centre was 25 miles east of Dominica and 80 miles southeast of Guadeloupe.

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.

All of the islands under watch were significantly impacted by Hurricanes Maria or Irma last September, with some of them still trying to rebuild. "Near the coast, the surge will be accompanied by large and destructive waves", the NHC added. "Intermittent rain bands are expected on St. Croix as Isaac passes south of the big island". "This rainfall may cause life-threatening flash floods".

Isaac, along with Florence, Helene and two other systems increasingly likely to form, have set a hectic pace for the Atlantic - even busier than previous year when Harvey, Isaac and Maria made landfall within three weeks of each other.

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Hurricane Warnings are in effect from the South Santee River in SC to Duck, North Carolina.

At this time no tropical storm/hurricane watches or warnings are in effect for Barbados.

"Regardless of development, heavy rainfall and gusty winds are expected across portions of northeastern Mexico, Texas, and Louisiana on Friday and Saturday", the hurricane center said.

There is the potential for damaging winds with gusts up to 70mph possible, with sustained winds of 30 to 40mph.

Tropical storm conditions are expected within the tropical storm warning area beginning within the next few hours through the afternoon.

With the ground already saturated from recent rain, another drenching from Florence combined with winds could easily lead to trees being uprooted and widespread power outages, he said.

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