FREE WEB BETA
Check public-source sky and local conditions, plan a viewing window, and keep a record of what you observe.
Free web beta. No account required. For U.S. adults 18 and older. Found a bug or something unclear? Tell us the page, your browser and what happened. Leave out private locations, notes and recordings.
01 / SIGNAL
Signal brings together public-source sky, space, weather and earth context to help you find something worth looking up for.
TONIGHT'S READ
Signal is in beta.Explore local NWS conditions and alerts, NOAA space weather and nearby USGS earthquake activity. Check each source's time, coverage and limitations before making a plan.
For curiosity and planning, not emergency warnings or an all-clear.
Plan a night ↗MOBILE / COMING SOON
Mobile app coming soon.