Observation Lab
Narrow candidates from visible cues — without pretending the sky is simple.
This educational lab uses a few visual clues to rank candidate records. It is deliberately conservative: no forecast, no hazard diagnosis, no image-recognition claim.
Safety boundary. If you hear thunder, see lightning nearby, or face hazardous weather, stop observing and follow official local weather guidance.
Choose visible cues and run the lab. Results explain why each candidate appears; they do not diagnose current conditions.