Coastal Change Hazards Team Forecasted and Measured Hurricane Helene Beach Impacts
The USGS Coastal Change Hazards Portal shows potential coastal change from Hurrricane Helene. Prior to landfall on the Florida coast on September 26, 2024, the Coastal Change Hazards Team predicted that 63 percent of beaches from Horn Island, MS to Marco Island, FL were very likely to erode at the dunes’ base, 50 percent of dunes were very likely to be overwashed by storm waves, and 32 percent of dunes were expected to be very likely to be inundated (completely submerged) by surge, tide, and waves given worst-case scenario surge and timing of the storm. In addition to special forecasts
Coastal Change Hazards Team Forecasted and Measured Hurricane Milton Beach Impacts
The USGS Coastal Change Hazards Portal shows potential coastal change from Hurrricane Milton. Prior to landfall on the Florida coast on October 9, 2024, the Coastal Change Hazards Team predicted that 86 percent of beaches along the west coast of the Florida peninsula were very likely to erode at the dunes’ base, 82 percent of dunes were very likely to be overwashed by storm waves, and 75 percent of dunes were expected to be very likely to be inundated (completely submerged) by surge, tide, and waves given worst-case scenario surge and timing of the storm. In addition to special forecasts
Separating the land from the sea: image segmentation in support of coastal hazards research and community early warning systems
Total water level (TWL) at the shoreline is the key metric for assessing coastal flooding and erosion. Predictions of TWL are necessary for long-term coastal planning and early warning systems including the USGS/NOAA Total Water Level and Coastal Change Forecast (TWL&CC). However, TWL is both difficult to predict and difficult to measure. Various TWL measurement techniques including cross-shore arrays of pressure sensors and wire gauges have been used in the past, but these techniques are costly, time consuming and unlikely to be scaled up to a national scale such as would be required for a comprehensive validation of the USGS
Coastal Flood Advisory issued November 22 at 3:23PM EST until November 23 at 4:00PM EST by NWS Newport/Morehead City NC
* WHAT...1 to 2 feet of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. * WHERE...Soundside areas adjacent to the Albemarle, Croatan and Roanoke Sounds, Kitty Hawk Bay, the Pamlico Sound, and adjacent tidal creeks. * WHEN...Until 4 PM EST Saturday. * IMPACTS...Up to 1 to 2 feet of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways resulting in a low threat of property damage. Some roads and low lying property including parking lots, parks, lawns, and homes adjacent to the waterfront will experience shallow flooding.
Brown County Residents Invited to Attend Virtual Coastal Flood Map Open House
Brown County Residents Invited to Attend Virtual Coastal Flood Map Open House CHICAGO – On Feb. 22 and 24, representatives from the Federal Emergency Management Agency (FEMA) will host two sessions of a Virtual Coastal Flood Map Open House for the Lake Michigan shoreline communities in Brown County, Wisconsin. The open house will give residents the chance to review preliminary versions of a recently completed Flood Insurance Study (FIS) report and its accompanying preliminary Flood Insurance Rate Map (FIRM). This FIS report and FIRM provide information on the base flood (also known as the 1-percent-annual-chance event) and the shoreline areas
Coastal Flood Advisory issued November 21 at 2:16PM EST until November 23 at 4:00PM EST by NWS Newport/Morehead City NC
* WHAT...1 to 2 feet of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. * WHERE...Soundside areas adjacent to the Albemarle, Croatan and Roanoke Sounds, Kitty Hawk Bay, the Pamlico Sound, and adjacent tidal creeks. * WHEN...From 4 PM Friday to 4 PM EST Saturday. * IMPACTS...Up to 1 to 2 feet of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways resulting in a low threat of property damage. Some roads and low lying property including parking lots, parks, lawns, and homes adjacent to the waterfront will experience shallow
Coastal Flood Advisory issued November 21 at 3:38AM EST until November 21 at 5:00PM EST by NWS Upton NY
* WHAT...Up to one foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...In Connecticut, Southern Fairfield County. In New York, Southern Westchester County. * WHEN...From 1 PM to 5 PM EST this afternoon. * IMPACTS...Minor flooding in the more vulnerable locations near the waterfront and shoreline. Some roads and low lying properties including parking lots, parks, lawns, and homes and businesses with basements near the waterfront will experience minor flooding.
Coastal Flood Statement issued November 21 at 3:38AM EST until November 21 at 4:00PM EST by NWS Upton NY
* WHAT...Up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southern New Haven, Southern Middlesex and Southern New London Counties. * WHEN...From noon EST today through this afternoon. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline.
Coastal Flood Statement issued November 21 at 4:25AM EST until November 21 at 5:00PM EST by NWS Key West FL
* WHAT...Minor saltwater flooding. * WHERE...The Middle and Upper Keys. * WHEN...Through this afternoon. * IMPACTS...Minor saltwater flooding of low elevation streets and lots is likely. Some storm drains will overflow, and some seawalls and docks will be overtopped. Boaters can expect less clearance under fixed bridges. Motorists should remember that persistent puddles around the times of high tide are almost certain to contain a mix of saltwater. * ADDITIONAL DETAILS...