NFR
great to know the wind at say 500 feet as per reasons above, but certainly on runway selection issues, the landing distance data calculations are made on the 50' agl wind (crossing threshold and assumes such wind exists on the runway). Tailwind on final preferable to tailwind on landing for sure.
Windshear considerations aside, tailwind on final will really only mean you will need less power to maintain the stable slope. Doesnt matter whether you are in a jet or a C150.
I presume you are ATC hence good on you displaying your interest.
