Getting Started with Coastal Flood Alerts: A Beginner's Guide

Coastal flooding poses significant risks to communities along the U.S. coastline. Understanding how to interpret and respond to coastal flood alerts is crucial for safety and preparedness.

What Are Coastal Flood Alerts?

Coastal flood alerts are notifications issued by the National Weather Service (NWS) to inform the public about potential or ongoing flooding along coastal areas. These alerts are categorized into three main types:

• Coastal Flood Watch: Indicates that flooding is possible within the next 12 to 48 hours.

• Coastal Flood Advisory: Issued when minor flooding is expected, which may cause inconvenience but is not life-threatening.

• Coastal Flood Warning: Signifies that flooding is imminent or occurring, posing a serious threat to life and property. Immediate action is required. (forecast.weather.gov)

Understanding the Severity Levels

Coastal flooding is classified into three severity levels based on how much water levels exceed the average high tide:

• Minor Flooding: Water levels reach 0.55 meters (1.8 feet) above average high tide. This level causes disruptions like road closures but poses minimal risk to life and property.

• Moderate Flooding: Water levels reach 0.85 meters (2.8 feet) above average high tide. This can lead to significant disruptions and potential damage to homes and businesses.

• Major Flooding: Water levels reach 1.20 meters (3.9 feet) above average high tide. This level presents a serious threat to life and property, requiring immediate action. (oceanservice.noaa.gov)

How to Stay Informed

To receive timely coastal flood alerts, consider the following methods:

• NOAA Weather Radio: Provides continuous broadcasts of official Weather Service information, including weather and flood alerts.

• Wireless Emergency Alerts (WEA): Short emergency messages sent by authorized authorities to alert people about emergencies in their area.

• Mobile Apps: Many weather apps offer push notifications for severe weather alerts, including coastal flooding.

• Local News and Weather Services: Stay updated through local news outlets and their websites or social media channels.

Using NOAA's Coastal Inundation Dashboard

The National Oceanic and Atmospheric Administration (NOAA) offers the Coastal Inundation Dashboard, an interactive tool that provides real-time and forecasted coastal water levels, along with historical flood data. This resource helps users monitor water levels during storms and assess short-term flood risks. (coast.noaa.gov)

Safety Measures During Coastal Flooding

If you receive a Coastal Flood Warning, take immediate action to protect yourself and your property:

• Move Inland: If you are near the coast and water begins rising, move inland to escape floodwaters.

• Secure Property: Protect your property by securing loose objects and boarding up windows close to the ground.

• Evacuation Plans: Be prepared to leave immediately if coastal flooding becomes imminent. Know your evacuation routes and have an emergency kit ready. (weather.gov)

Conclusion

Coastal flooding is a serious threat that can occur even on sunny days due to rising sea levels and other factors. By understanding the types of coastal flood alerts, staying informed through reliable sources, and taking appropriate safety measures, you can protect yourself and your community from the dangers of coastal flooding.

Highlights:

• Coastal Flood Alerts Explained: A Worsening Threat That Can Happen Even When The Sun Is Shining | Weather.com, Published on Sunday, September 14
• What is high tide flooding?, Published on Thursday, July 24
• Coastal Flood Safety Rules