What is "coastal flood advisory"?

A coastal flood advisory is a warning issued by the National Weather Service (NWS) to alert residents and visitors of potential flooding along coastal areas. This advisory is typically issued when a combination of factors, such as high tide, strong winds, and low pressure systems, are expected to cause water levels to rise above normal levels and potentially flood coastal regions.

Coastal flooding is a common and potentially dangerous phenomenon that can occur in low-lying coastal areas, especially during storms or heavy rainfall. The combination of high tides and storm surge can lead to significant flooding, causing damage to homes, businesses, infrastructure, and posing risks to human life.

The NWS issues coastal flood advisories to provide timely information to the public and help them prepare for potential flooding events. These advisories are typically issued 12-36 hours in advance of the expected flooding and include information on the timing, location, and severity of the flooding, as well as recommended actions to take to protect life and property.

One example of a coastal flood advisory was issued in September 2021 for the Gulf Coast region of the United States. The advisory warned of potential coastal flooding due to a combination of high tides, strong onshore winds, and a tropical disturbance moving through the area. Residents were advised to take precautions, such as securing loose outdoor items, moving vehicles to higher ground, and avoiding low-lying areas prone to flooding.

Coastal flood advisories are important tools for helping communities prepare for and respond to potential flooding events. By providing early warning and guidance, these advisories can help minimize the impact of coastal flooding on lives and property.

In addition to coastal flood advisories, the NWS also issues coastal flood watches and warnings. A coastal flood watch is issued when conditions are favorable for coastal flooding to occur, while a coastal flood warning is issued when flooding is imminent or already occurring. These watches and warnings provide additional information and guidance to the public to help them stay safe during flooding events.

It is important for residents and visitors in coastal areas to pay attention to coastal flood advisories, watches, and warnings and take appropriate actions to protect themselves and their property. Some recommended actions to take during a coastal flood advisory include:

1. Stay informed: Monitor weather forecasts and updates from the NWS to stay informed about potential flooding events in your area.

2. Prepare your home: Move valuable items to higher ground, secure outdoor furniture and belongings, and consider installing flood barriers or sandbags to protect your property from flooding.

3. Evacuate if necessary: If local authorities recommend evacuation due to a coastal flood warning, follow their instructions and evacuate to higher ground or a designated shelter.

4. Avoid flooded areas: Do not attempt to drive or walk through flooded areas, as the water may be deeper or moving faster than it appears. Turn around, don't drown!

5. Stay safe: During a coastal flood event, stay indoors, away from windows and doors, and avoid contact with floodwaters, which may be contaminated or carry debris.

Coastal flood advisories play a crucial role in helping communities prepare for and respond to potential flooding events along coastal areas. By following the guidance provided in these advisories and taking appropriate actions, residents and visitors can stay safe and minimize the impact of coastal flooding on their lives and property.