Irma is a medium-large hurricane, and is expected to grow in size as it progresses west-northwest over the next four days.
If Irma makes a trek up the East Coast from Miami to southern South Carolina as a Category 3 or 4 hurricane, as the models currently suggest, the portions of the coast that the eyewall touches will potentially see a massive and catastrophic storm surge, breaking all-time storm surge records and causing many billions of dollars in damage.
The area of most concern is the northern coast of Florida, the coast of Georgia, and the southern coast of South Carolina, due to the concave shape of the coast, which will act to funnel and concentrate the storm surge to ridiculous heights.
Ranges from 17 – 20’ above ground along the northern coast of Florida, and 18 – 23 feet above ground along the Georgia coast. If Irma is a Cat 4, these numbers increase to 22 – 28 feet for the coast of Georgia.
South Florida is not at as great of a risk of a high storm surge, since there is deep water offshore, and the mound of water the hurricane piles up can flow downward into the deep ocean instead of getting piled up on land.
Operation Stormwatch is Here.