* WHAT. Large breaking waves upwards of 14 to 15 ft. * WHERE. San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN. From 6 AM Tuesday to 6 AM PST Wednesday. * IMPACTS. Dangerous swimming and surfing conditions and localized beach erosion. Large waves can sweep across the beach without warning, pulling people into the sea from rocks, jetties and beaches. Sudden immersion in cold water can result in cold water shock even for the most experienced swimmers. Cold water shock can result in dramatic changes in breathing, heart rate and blood pressure, greatly increasing the risk of drowning in rough open waters. * ADDITIONAL DETAILS. Northwest facing beaches are most at risk for large turbulent shore break and strong currents.

* WHAT. Large breaking waves upwards of 14 to 16 ft. * WHERE. San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast. * WHEN. From 6 AM Tuesday to 6 AM PST Wednesday. * IMPACTS. Dangerous swimming and surfing conditions and localized beach erosion. Large waves can sweep across the beach without warning, pulling people into the sea from rocks, jetties and beaches. Sudden immersion in cold water can result in cold water shock even for the most experienced swimmers. Cold water shock can result in dramatic changes in breathing, heart rate and blood pressure, greatly increasing the risk of drowning in rough open waters. * ADDITIONAL DETAILS. Northwest facing beaches are most at risk for large turbulent shore break and strong currents.