NWS Flood Advisory: San Francisco

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Post on Nov 23, 2024

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NWS Flood Advisory: San Francisco - Stay Safe During Heavy Rainfall

The National Weather Service (NWS) frequently issues flood advisories for San Francisco, a city prone to flash floods due to its hilly terrain and sometimes intense rainfall. Understanding these advisories and taking appropriate precautions is crucial for your safety and the safety of your property. This guide will help you navigate NWS flood advisories specific to San Francisco, explaining what they mean, how to prepare, and what actions to take during and after a flood event.

Understanding NWS Flood Advisories

A Flood Advisory from the NWS signifies that flooding is occurring or is imminent. It's a less severe warning than a Flood Warning, but it still demands your attention. For San Francisco, these advisories often accompany periods of heavy rainfall, especially during the winter months. The advisory will typically specify:

• The affected area: This will pinpoint the specific neighborhoods or districts within San Francisco experiencing or expected to experience flooding.
• The timing of the event: The advisory will provide a timeframe for when the flooding is expected to begin and end.
• Potential impacts: This might include road closures, ponding of water, and potential for rapid rises in creeks and streams.

Key Differences: It's vital to differentiate between a Flood Advisory and a Flood Warning. A Flood Warning indicates that flooding is already happening or is about to happen and poses a significant threat to life and property. A Flood Advisory is a less severe alert, suggesting potential for flooding that warrants preparedness and caution.

Preparing for a San Francisco Flood Advisory

Preparation is key to mitigating the impact of a flood advisory. Here's what you should do:

Before the Advisory:

• Sign up for emergency alerts: Register with the city of San Francisco's emergency notification system to receive timely updates and warnings directly to your phone or email.
• Identify flood-prone areas: Familiarize yourself with areas in San Francisco known for flooding. This knowledge helps you anticipate potential hazards.
• Develop an evacuation plan: If you live in a flood-prone area, have a plan in place to evacuate quickly and safely. Identify alternate routes and a safe place to go.
• Prepare an emergency kit: Keep a kit readily accessible with essential supplies such as water, non-perishable food, flashlights, batteries, first-aid supplies, and important documents in waterproof containers.

During the Advisory:

• Monitor weather reports: Stay updated on the latest forecasts and advisories from the NWS.
• Avoid flooded areas: Never drive or walk through flooded areas. The water may be deeper than it appears, and currents can be strong. "Turn Around, Don't Drown" is crucial advice.
• Move valuables to higher ground: If possible, move valuable items and electronics to upper floors or elevated areas.
• Stay indoors: Unless absolutely necessary, stay indoors and away from floodwaters.

After the Flood Advisory

• Assess the damage: Once the advisory has been lifted, carefully inspect your property for damage.
• Report damage: Contact your insurance company and the city of San Francisco to report any flood-related damage.
• Be aware of hazards: Be cautious of downed power lines, debris, and contaminated water.
• Clean up safely: When cleaning up, wear protective gear and take precautions to avoid injury or exposure to hazardous materials.

San Francisco Specific Flood Considerations

San Francisco's unique geography presents specific flood challenges. Steep hills can lead to rapid runoff, and aging infrastructure can contribute to localized flooding. Areas along creeks and streams are particularly vulnerable. Knowing your neighborhood's susceptibility to flooding is critical.

Resources for San Francisco Residents

• National Weather Service (NWS): Check their website regularly for forecasts and advisories.
• City of San Francisco Emergency Management: Their website provides valuable information and resources.
• San Francisco Public Utilities Commission (SFPUC): They manage the city's drainage systems and provide updates on water conditions.

By understanding NWS Flood Advisories, preparing proactively, and following safety guidelines, San Francisco residents can significantly reduce the risks associated with flooding and protect themselves and their communities. Remember: safety is paramount during a flood advisory. Stay informed, stay prepared, and stay safe.