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  Home > Experimental Tropical Cyclone Hazards Graphics > Tropical Cyclone Impact
See this office's Graphical Hurricane Local Statement:

Tampa Bay, Florida
Coastal Flooding Impact
Wind Tornadoes Inland Flooding Coastal Flooding
Impacts by County from coastal flooding for the NWS Tampa Bay, Florida warning area
 
None
 
Very Low
 
Low
 
Moderate
 
High
 
Extreme
Alabama
Mobile

Florida
Jacksonville
Key West
Melbourne
Miami
Pensacola
Tallahassee
Tampa Bay

Louisiana
Lake Charles

Maryland
Baltimore/Washington

New Jersey
Mount Holly

New York
New York City/Upton

North Carolina
Newport/Morehead City
Wilmington

Pennsylvania
Philadelphia

South Carolina
Charleston

Texas
Brownsville
Corpus Christi

Virginia
Wakefield

Washington, DC
Baltimore/Washington


Coastal Flooding Impacts Definitions
Read this office's detailed Hurricane Local Statement

None Threat - No discernable threat to life and property; surge waters 2 feet or less.

Minimum Action - Evaluate personal and community disaster plans and ensure seasonal preparedness activities are complete.

Potential Impact - Coastal flooding is not expected; impact should be negligible. Coastal Residents in typically flood-prone areas may see tidal "run-up" and perhaps some overwash during high tide. Others will experience little change. Surf conditions may still be rough with minor beach erosion.

Low Threat - An elevated threat to life and property; the likelihood for storm surge and storm tide waters of 3 to 4 feet.

Minimum Action - Prepare for the possibility of minor storm surge damage.

Potential Impact - Residents living on coastal flood-prone shorelines can expect some water incursion into their homes. These residents may have a foot or two of water in their homes, causing minor damage. Shoreline roads may briefly close with up to 3 feet of water across them. Moderate beach erosion is possible, becoming likely if conditions extend through multiple high tide cycles. Heavy surf may breach dunes in isolated locations.

Moderate Threat - A significant threat to life and property; the likelihood for storm surge and storm tide waters of 5 to 8 feet.

Minimum Action - Prepare for the likelihood of moderate storm surge damage.

Potential Impact - Coastal Inundation of Prone Communities Possible. Residents living on the shoreline will experience significant flooding especially during high tide. Homes will likely become uninhabitable in flood prone areas where entire coastal communities will be temporarily cutoff with sections of near-shore escape roads weakened or washed out. Water levels may exceed 6 feet more than a mile inland. Coastal residents of one story homes who do not evacuate will face life-threatening consequences; those in multi-story or multi-unit facilities risk being cutoff for days. Parked vehicles will be severely damaged in the flood zone. Conditions will be worsened by battering waves which will exacerbate property damage. Beach erosion will be substantial, and require months to clean up. Surge waters and wind waves breaching dunes and seawalls in scattered locations to result in structural damage to a few shoreline buildings, mainly in historically vulnerable spots. Minor damage to marinas, docks, and piers. A few small craft may break away from moorings, especially in unprotected anchorages.

High Threat - A critical threat to life and property; the likelihood for storm surge and storm tide waters of 9 to 12 feet.

Minimum Action - Prepare for the likelihood of major storm surge damage.

Potential Impact - Life-Threatening Inundation Likely! All neighborhoods, and possibly entire coastal communities, will be inundated especially during high tide. People not heeding evacuation orders in single family one or two story homes will face certain death. Many residences of average construction directly on the coast will be destroyed; widespread, devastating personal property damage is likely elsewhere. Vehicles left behind will be swept away. Numerous roads will be swamped; some may be washed away by the water. Entire flood-prone coastal communities will be cutoff, perhaps for more than a week; water levels may exceed 9 feet more than a mile inland. Coastal residents in multi-story facilities risk being cutoff for a week or more. Conditions will be worsened by battering waves. Such waves will exacerbate property damage, with likely massive destruction of homes, including those of block construction. Damage from beach erosion could take years to repair. The last documented example: The 1921 Tampa Bay Hurricane, which produced a 10.5 foot storm tide.

Extreme Threat - An extreme threat to life and property; the likelihood for storm surge and storm tide waters greater than 13 feet

Minimum Action - Prepare for the likelihood of extreme to catastrophic coastal flood damage.

Potential Impact - Unprecedented Inundation Likely! Entire coastal cities and towns will be inundated. Some barrier island beaches will be destroyed beyond recognition; permanent breaches may be cut. Thousands of homes and vehicles will be washed away; larger structures such as condominiums and hotels may also be destroyed; others with poor support may collapse. Persons who fail to evacuate will be swept to their deaths, as will livestock in flood plains. Should the storm surge envelop any of the larger coastal urban centers such as Tampa Bay, dollar damage will be a modern-day record. Hundreds of roads will be washed away; full recovery will take years. Water levels may exceed 13 feet more than a mile inland. Conditions will be worsened by battering waves. Such waves will not only exacerbate property damage, but wash out solid road and bridge structures. Damage from beach erosion will take years to repair. There are no comparative examples on the Suncoast. Recent Gulf of Mexico devastating surge examples include Ivan (low-end, 2004) and Katrina (high-end, 2005).

Wind
Click for wind impacts for the NWS Tampa Bay, Florida warning area
Tornadoes
Click for tornado impacts for the NWS Tampa Bay, Florida warning area
Inland Flooding
Click for inland flooding impacts for the NWS Tampa Bay, Florida warning area
Coastal Flooding
Click for coastal flooding impacts for the NWS Tampa Bay, Florida warning area
None Very Low Low Moderate High Extreme
 

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     Page last Modified: 8 June, 2009 11:45 AM