Coastal Flood Advisory

A Coastal Flood Advisory means that conditions are favorable for flooding in coastal and bay areas. It is a less serious announcement than a Coastal Flood Warning. While not immediately life-threatening, a Coastal Flood Advisory indicates that inundation is expected, which could cause inconvenience and potentially hazardous conditions, particularly for low-lying areas.

What Causes a Coastal Flood Advisory?

Several factors can contribute to coastal flooding, leading to an advisory being issued. These include:

• High Tides: Particularly spring tides (which occur during new and full moons) are naturally higher and lower than normal, increasing the risk of flooding if combined with other factors.
• Storm Surge: Even relatively weak storms can push water towards the coastline, creating a surge that floods low-lying areas.
• Onshore Winds: Persistent winds blowing from the sea towards the shore can pile up water, contributing to higher water levels.
• Heavy Rainfall: While not directly a coastal phenomenon, heavy rainfall inland can exacerbate flooding in coastal areas as rivers and streams overflow, draining into already-stressed tidal zones.
• Sea Level Rise: Long-term sea level rise is making coastal areas more vulnerable to flooding from even minor events.

Potential Impacts of a Coastal Flood Advisory

While not as severe as a Coastal Flood Warning, a Coastal Flood Advisory still presents potential hazards and disruptions. Some of the potential impacts include:

• Road Closures: Low-lying coastal roads may become impassable due to flooding, disrupting traffic and commutes.
• Property Damage: Basements and lower levels of buildings near the coast could experience flooding, leading to property damage.
• Erosion: Coastal erosion can be accelerated during flooding events, damaging beaches and dunes.
• Disruptions to Businesses: Businesses located in coastal areas may be forced to close or curtail operations due to flooding.
• Impacts to Marine Life: Coastal flooding can impact sensitive marine ecosystems and disrupt habitats.

What to Do During a Coastal Flood Advisory

It’s crucial to take the necessary precautions when a Coastal Flood Advisory is issued:

• Monitor Conditions: Stay informed by monitoring weather forecasts and alerts from the National Weather Service or your local authorities.
• Avoid Flooded Areas: Never drive or walk through flooded areas. The water could be deeper than it appears, and there may be hidden hazards.
• Protect Property: If possible, move vehicles to higher ground and secure outdoor furniture.
• Secure Boats: If you have a boat, ensure it is properly secured to prevent it from being damaged or causing damage to other property.
• Be Prepared to Evacuate: If you live in a low-lying area, be prepared to evacuate if flooding becomes more severe. Have an evacuation plan in place.

Taking these steps will help you stay safe and minimize the impact of a Coastal Flood Advisory.