Source: lightning positions come from Blitzortung.org, a free, volunteer-run detection network (also powers LightningMaps.org) — no API key or account involved. The map itself is interactive: pan, zoom, and scroll freely.

Important — this is not a safety tool. Blitzortung's own network explicitly says its data is for informational/entertainment purposes and should not be relied on to protect people or property. Strike detections can lag real time by a minute or more and coverage density varies by region. For actual lightning safety decisions, use official National Weather Service warnings — the standard guidance is "when thunder roars, go indoors," regardless of what any map shows.