Residents along the South Washington Coast are being urged to prepare for tidal overflow flooding following a coastal flood advisory issued by the National Weather Service (NWS) Portland office. This advisory went into effect early Friday morning and remains valid until 2 p.m., warning of minor flooding in low-lying areas prone to tidal surges.
Coastal Flood Advisory Details
According to the NWS update at 1:11 a.m. on Friday, significant tidal activity is expected throughout the morning and early afternoon. Tidal gauges at Toke Point and Astoria predict tides reaching up to 11.2 feet, while Garibaldi anticipates tides as high as 10.7 feet. These conditions are likely to cause minor flooding—up to one foot above ground level—in regions near bays, sloughs, and the lower stretches of coastal rivers.
The advisory highlights the risk of “tidal overflow flooding,” urging coastal residents to stay alert and take necessary precautions to safeguard life and property. As tides peak, water could inundate roads, yards, and other vulnerable areas.
Safety Recommendations for Residents
The NWS emphasizes the importance of immediate action for those living in flood-prone or low-lying areas. Key safety steps include:
- Move to higher ground without delay, especially if camping near coastal or river areas.
- Follow official evacuation orders promptly.
- Secure your home by locking doors and, if time permits, disconnect utilities and appliances.
- Avoid basements or any rooms that are flooded or where electrical outlets or cords are submerged.
- Stay away from water that may contain electrical currents, and evacuate immediately if you see electrical sparks or hear buzzing noises.
- Never walk through floodwaters, as just six inches of moving water can knock a person off their feet.
- If trapped by floodwaters, seek the highest point possible and call emergency services.
Driving During Flood and Rain Conditions
Heavy rainfall accompanying the coastal flooding can worsen the situation by causing flooded roads and hazardous driving conditions. The NWS advises drivers to exercise caution:
- Always switch on headlights during rain to improve visibility.
- Use middle lanes when possible, as water tends to pool along the edges of roadways.
- Avoid driving through puddles or flooded sections to reduce the risk of hydroplaning or vehicle damage.
- Maintain a safe distance from large vehicles that may spray water, impairing your visibility.
- If encountering a flooded road, never attempt to cross—turn around and seek an alternate route. Just 12 inches of rushing water can sweep away most vehicles.
Understanding Hydroplaning and How to Respond
Hydroplaning is a serious risk during wet weather conditions. It happens when water builds up faster than a vehicle’s tires can push it aside, causing the vehicle to slide uncontrollably on a thin water layer. Factors influencing hydroplaning include vehicle speed, water depth, and tire tread condition.
If your vehicle starts to hydroplane, the NWS recommends:
- Easing off the accelerator to reduce speed.
- Steering gently in the direction of the skid to regain control.
- Waiting until tires reconnect firmly with the road before making corrections.
- Braking gently—if equipped with anti-lock brakes, brake normally; otherwise, pump the brakes lightly.
Stay Informed and Prepared
With the coastal flood advisory active until Friday afternoon, those living along the South Washington Coast should remain vigilant. Stay tuned to local weather updates, follow guidance from emergency services, and prioritize safety.
For more information and timely updates, residents are encouraged to follow announcements from the National Weather Service and local news outlets.
Source: National Weather Service, Tri-City Herald
