Scout Ahead https://www.scoutahead.org/plans/weather-merit-badge/questions

Which of this applies to you?

Answering these takes the parts that are not for you out of Weather Merit Badge. Nothing is required, nothing is kept on the server, and nothing is ever hidden because a question went unanswered. A step that might apply to you stays on the list and is marked.

Requirement 10: log or visit?

The badge says do ONE of the following. The log is a week of entries at the same time each day, from an instrument you make. The visit needs a weather professional's time.