See which official sources feed each alert, storm track and action step, and where to verify them

We do not produce forecasts. Everything is built from the sources below, and every action step links to its own source.

• National Weather Service (api.weather.gov)
  Alerts, gridded forecasts, station observations and zone boundaries.
• National Hurricane Center
  Tropical storm positions, forecast tracks and cones, advisories and outlooks.
• CDC
  Carbon monoxide and cold or heat health guidance used in action steps.
• AirNow (EPA)
  Air quality guidance.
• State and county emergency management
  Local alerts, evacuation orders and shelter information, linked for each state.
• GeoNames
  ZIP code area centers used to find your location (approximate).