Slides for andrew

Slides for andrew

Storm surge from Hurricane Hugo was minimal, but enough to ground this ferry in Fajardo.

Their ship has come in!

Sand washover along the Piones shoreline after Hurricane Hugo. An estimated 500,000 cubic meters of sand was washed ashore along this stretch (Bush, 1991).

Terminology

• Storm surge—water above normal astronomical tide

• High water level—maximum still water height reached during storm

• Storm tide—NOAA term for high water level

Storm Surge

• Storm physical characteristics• Movement of the storm• Shape of the shoreline

storm

surg

e

high water level

tide level

Observed (high water level) - Predicted (tides) = Storm Surge

Storm-surge levels along South Carolina coast (from FEMA).

Base flood elevation, including wave effects

100-year stillwater

Meansea level

A Zone

Wave height less than 3 feet

V Zone

Wave height greater than 3 feet

ShorelineSand dune

Wooded regionOverland wind fetch

Buildings

Limit oftidal floodingand waves

20 miles

20 miles

Eye at landfall Radius of maximum winds

Charleston

Hurricane Hugo (1989), South Carolina, Storm Surge Profile