The Saffir-Simpson Scale for ranking hurricanes is only a crude measure of their potential impacts.

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The Saffir-Simpson scale assigns a storm a number between 1 and 5, with "1" being a weak hurricane and "5" the strongest.

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Hurricanes are ranked 1 to 5 in intensity on the Saffir-Simpson scale.

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The forecast said three to five of the hurricanes will be major storms ranked Category 3 or higher on the Saffir-Simpson scale of hurricane strength.

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In a report released Tuesday, CSU's Tropical Meteorology Project (TMP) forecast half of those hurricanes will develop into major hurricanes ranked as Category 3 or higher on the Saffir-Simpson scale of hurricane strength.

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Unions have condemned Peugeot's decision to shut up shop, with Amicus general secretary Derek Simpson insisting that lay-offs on this scale would be "inconceivable" in France where workers enjoy stronger labour laws.

BBC: NEWS | Business | No surprise as Peugeot pulls out of UK