After Florence makes landfall, that ridge, now over Washington and NY, will move east - but be replaced by another one forming over the Great Lakes that will likely keep the storm stuck, McNoldy said.
Florence, now a Category 4 storm with sustained winds of 130 miles per hour (209 km/h), was previously expected to travel north, up the North Carolina coast, after making landfall, according to the statement.
"This storm is a monster". Stormhunters Jaclyn Whittal and Mark Robinson will be LIVE in the Carolinas with the latest.
North Carolina Governor Roy Cooper is foreboding in his assessment Hurricane Florence.
"I can't emphasize enough the potential for unbelievable damage from wind, storm surge, and inland flooding with this storm".
Predicted rainfall totals for Hurricane Florence.
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Hurricane Helene is moving west-northwest over the eastern Atlantic and is strengthening quickly over the tropical Atlantic. It took Matheson and her husband almost the whole day Monday to drive the 60 miles (100 kilometers) off the barrier island.
Life-threatening storm surges of up to 3.9 metres were also forecast in some areas of North Carolina along with the possibility of tornadoes.
The News & Observer reports that the storm's path shifted early Wednesday and it is now bearing down on southern North Carolina and northern SC, where it could dump up to 40 inches of rain in places.
All 22 of the FBS and FCS games scheduled this weekend in South Carolina, Washington, D.C., Virginia and North Carolina were canceled or adjusted in some way due to the storm, according to CBS' Jerry Palm.
The storm will stay over this area of the United States through the weekend with North Carolina cities Wilmington and Jacksonville expected to receive up to 130 centimetres of rain.
In Virginia, where about 245,000 residents were ordered to evacuate low-lying areas, officials urged people to remain away from home despite forecast changes showing Florence's path largely missing the state.
Georgia Governor Nathan Deal declared a state of emergency "in light of the storm's forecasted southward track after making landfall".
"We are uniquely positioned to establish a quick ad-hoc supply chain to support relief efforts", said Bettina Stix, an Amazon veteran credited with developing DRbA.
He said electric power could be out for weeks. For example, the seas off of Wilmington, North Carolina have risen 7.5 inches since 1935, according to NOAA.