Which free, web-based weather source does the FAA point remote pilots to that requires no registration and provides products such as METARs and TAFs?

Why: AC 107-2A Appendix B.3.1 names the NWS Aviation Weather Center (aviationweather.gov) as a free, web-based service that requires no registration and offers products important to a remote PIC, including METARs and TAFs.

• Misstates 1800wxbrief.com as registration-free — the same AC paragraph says a remote pilot must create a free account there to use the briefing service, unlike aviationweather.gov.
• Misassigns weather-product data to tfr.faa.gov, which the AC identifies only as the site for checking Temporary Flight Restrictions, not METARs or TAFs.