MEM_ATC, most transport category aircraft have crosswind component max speeds of around 30 kts and tailwind max's of around 10 kts (talk to your super for exact numbers for Fedex a/c - he should have the numbers or know who to call to get them). Any kind of tailwind equals longer rollouts and any tailwind over 5 kts is definitely not desired. Landing in any type of gusty winds is not fun, but the conditions you describe would be very challenging. Anyone who would look at those kind of conditions as "fun" should get a psych eval. The company's position is that you should be able to land in any crosswind/tailwind less than the maximums, but they want you to go around if the approach becomes unstable or unsafe. I know Fedex asks for north landings for the inbounds from ATC, but it is your Super who should be making the call for what is safe.