There are common misconceptions about weather briefings. There is no such thing as a legal weather briefing.
CFR14 §91.103 requires that pilots obtain all available information before beginning a flight. ForeFlight delivers weather, NOTAMs, and airport information that help a pilot meet this requirement. ForeFlight's weather, NOTAM, and airport information come from federal regulatory agencies.
Pilots may want proof or a record of having received a briefing so that they can prove they met the requirements under §91.103 in the event of an incident.
ForeFlight stores a record of the briefing received for 120 days. The act of only looking at METARs and TAFs on the Airports or Maps page is not recorded.
The FAA has published an Advisory Circular that provides an educational roadmap for developing and implementing preflight self-briefings, including planning, weather interpretation, and risk identification/mitigation skills. Pilots performing self-briefings to meet the requirements of §91.103 should review and become familiar with the concepts in Advisory Circular 91-92.
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