On Thursday afternoon, Ophelia's core was located about 715 miles (1,150 kilometers) southwest of the Azores, where it was virtually stationary.
The NHC says Ophelia is barely moving and is continuing to strengthening, now boasting top sustained winds of 100 miles per hour.
The storm, which is now a Category 2, was initially not thought to be a land threat, swirling far from the American and European coastlines in the middle of the Atlantic.
The forecast track indicated Ophelia is expected to strike Ireland and Great Britain as a weakened storm by late Monday.
The weather will remain unsettled ahead of the storm's coming, with temperatures reaching 20C at times.
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The storm will have lost its tropical features by then, but that's an academic point, because the winds may still be as strong as a hurricane.
The milder weather will continue into Sunday, before a serious change on Monday when ex-Hurricane Ophelia hits the province.
Hurricane Ophelia has picked up speed as it moves to the east-northeast. The hurricane does not now pose a threat to any land.
The latest NOAA 5am update shows maximum sustained winds are near 85 miles per hour with the highest gusts.