* WHAT. A moderate period northwesterly swell will result in an increased risk for sneaker waves and rip currents. * WHERE. Pacific Coast beaches. * WHEN. 8 AM PDT Sunday through 11 PM PDT Tuesday. * IMPACTS. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. These waves can suddenly knock people off their feet and quickly pull them into the cold ocean waters, where currents will be stronger than normal. These waves can also carry driftwood logs and other debris.

* WHAT. A moderate period northwesterly swell will result in an increased risk for sneaker waves and rip currents. * WHERE. Pacific Coast beaches. * WHEN. 8 AM PDT Sunday through 11 PM PDT Tuesday. * IMPACTS. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. These waves can suddenly knock people off their feet and quickly pull them into the cold ocean waters, where currents will be stronger than normal. These waves can also carry driftwood logs and other debris.

* WHAT. A moderate period northwesterly swell will result in an increased risk for sneaker waves and rip currents. * WHERE. Pacific Coast beaches. * WHEN. 8 AM PDT Sunday through 11 PM PDT Tuesday. * IMPACTS. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. These waves can suddenly knock people off their feet and quickly pull them into the cold ocean waters, where currents will be stronger than normal. These waves can also carry driftwood logs and other debris.

* WHAT. A moderate period northwesterly swell will result in an increased risk for sneaker waves and rip currents. * WHERE. Pacific Coast beaches. * WHEN. Through 11 PM PDT Tuesday. * IMPACTS. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. These waves can suddenly knock people off their feet and quickly pull them into the cold ocean waters, where currents will be stronger than normal. These waves can also carry driftwood logs and other debris.

* WHAT. A moderate period northwesterly swell will result in an increased risk for sneaker waves and rip currents. * 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. Through Tuesday evening. * IMPACTS. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. These waves can suddenly knock people off their feet and quickly pull them into the cold ocean waters, where currents will be stronger than normal. These waves can also carry driftwood logs and other debris.

* WHAT. A moderate period northwesterly swell will result in an increased risk for sneaker waves and rip currents. * 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. Through Tuesday evening. * IMPACTS. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. These waves can suddenly knock people off their feet and quickly pull them into the cold ocean waters, where currents will be stronger than normal. These waves can also carry driftwood logs and other debris.

* WHAT. A moderate period northwesterly swell will result in an increased risk for sneaker waves and rip currents. * 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. Through Wednesday morning. * IMPACTS. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. These waves can suddenly knock people off their feet and quickly pull them into the cold ocean waters, where currents will be stronger than normal. These waves can also carry driftwood logs and other debris.

* WHAT. A moderate period northwesterly swell will result in an increased risk for sneaker waves and rip currents. * 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. Through Wednesday morning. * IMPACTS. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. These waves can suddenly knock people off their feet and quickly pull them into the cold ocean waters, where currents will be stronger than normal. These waves can also carry driftwood logs and other debris.

* WHAT. The South Coast AQMD has issued an air quality alert due to harmful levels of particle pollution from windblown dust. * WHERE. in the Coachella Valley. Levels of particle pollution can vary by time and location depending on emissions and local weather conditions. * WHEN. from 8AM Wednesday to 11AM Thursday. * IMPACTS. Particle pollution can get deep into the lungs and cause serious health problems such as asthma attacks, heart and lung disease symptoms, and increased risk of lung infections. Everyone can be affected, but sensitive groups such as people with lung or heart disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.

* WHAT. A moderate period northwesterly swell will result in an increased risk for sneaker waves and rip currents. * 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. Through Wednesday morning. * IMPACTS. Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. These waves can suddenly knock people off their feet and quickly pull them into the cold ocean waters, where currents will be stronger than normal. These waves can also carry driftwood logs and other debris.