Understanding Hurricane Storm Surges: A Beginner's Guide
Hurricanes are among the most powerful natural disasters, capable of causing widespread devastation. While their strong winds often capture attention, the most significant threat to coastal communities is often the storm surge.
What Is a Storm Surge?
A storm surge is an abnormal rise in seawater level caused by a storm, over and above the normal predicted astronomical tide. This surge can lead to extreme flooding in coastal areas, especially when it coincides with high tide, resulting in water levels that can reach up to 20 feet or more. (nhc.noaa.gov)
How Does a Storm Surge Form?
Storm surges are primarily caused by the strong onshore winds of a hurricane or tropical storm. As these winds circulate around the storm's eye, they push water toward the shore. In deep water, this doesn't cause a surge, but as the storm approaches the coast and the water becomes shallower, the water is forced upward and inland, resulting in a storm surge. (nhc.noaa.gov)
Factors Influencing Storm Surge Severity
Several factors can amplify the severity of a storm surge:
- Storm Intensity and Size: Stronger and larger storms produce higher surges.
- Forward Speed: Slower-moving storms allow water to pile up more, increasing the surge.
- Angle of Approach: Storms making landfall perpendicular to the coast tend to cause higher surges.
- Coastal Geography: Coastlines that curve inward or have gently sloping continental shelves are more vulnerable to higher surges. (nhc.noaa.gov)
Impacts of Storm Surges
Storm surges are the leading cause of fatalities during hurricanes. They can inundate coastal areas, erode beaches, destroy buildings, and flood inland rivers and lakes. The force of the water can also carry debris, further increasing the potential for damage. (nationalgeographic.com)
How to Prepare for a Storm Surge
Being prepared can make a significant difference during a storm surge:
- Stay Informed: Monitor weather updates and heed evacuation orders promptly.
- Know Your Risk: Understand if you live in a storm surge-prone area.
- Have an Evacuation Plan: Plan multiple routes to higher ground.
- Prepare an Emergency Kit: Include essentials like water, non-perishable food, medications, and important documents.
Conclusion
While hurricanes are formidable, understanding storm surges and their impacts can help communities better prepare and respond. Staying informed and having a plan are crucial steps in ensuring safety during these events.
Highlights:
- StormNet: Improving storm surge predictions with a GNN-based spatio-temporal offset forecasting model, Published on Wednesday, April 22