Bob Gardner wrote:
Only the NOAA site, to the best of my knowledge. And that is fairly
recently. When I read NTSB cases I note that the administrative law judges
put a lot of faith in government sources and blow off non-government
sources.

Seems to me from reading all those NTSB reports and some enforcement
cases, for most G/A ops, it is either a FSS or DUAT/DUATS briefing.

But, a lot of the corporate guys have a paid weather flight plan/weather
service, such as that provided by Jeppesen. They make records of
briefing and flight plan activity.

Then, most of the airlines have their own systems, which are accepted by
the FAA as being "legal."

Having said that, there is nothing that says the pilot can't use other
sources as supplements to the official briefing.

No one cares unless there is an incident or accident.