San Francisco Weather Alerts App

Alerts to prioritize

• Dense summer fog that keeps coastal neighborhoods cold and gray
• Extreme microclimate temperature swings across the city
• Winter atmospheric river storms with heavy rain and wind
• Wildfire smoke drifting in from inland fires in late summer

Where context helps

Weather radar helps track rain, but shallow fog may not appear on precipitation radar. Pair rain imagery with visibility observations, satellite imagery, and local forecasts when comparing coastal and inland neighborhoods.

Best alert use cases

• Comparing foggy and sunny neighborhoods
• Timing winter storms and atmospheric rivers
• Monitoring wildfire smoke and air quality
• Planning around the city's sharp microclimates