JammedStab:
It seems to me that your real concern is the problems that may be caused by some crosswind value that you believe will negate any of the otherwise computed speeds that are typically used for takeoff performance. I know that I could cite several regulatory requirements, but that is almost too much work. My suggestion, should I be so bold, would be to check either the AFM or, to be sure that you have the most appropriate information, I’d check the airplane manufacturer’s published table for maximum wind limits for takeoff and landing. I’ve done that for the B-737. This table includes reference for runway contamination in terms of braking action. Actually, for Boeing equipment you can check “on-line” under the “technical site” for the specific airplane. Here is what that table says for the B-737:
Wind Limits for T/O & Landing
Braking Action vs. Maximum Crosswind limit
Good = 35kt
Medium good = 30kt
Medium = 25kt
Medium poor = 20kt
Poor = 15kt
One of the easier plans I might suggest would be to refuse to takeoff if the crosswind reported (or computed by you at the end of the runway) exceeds the appropriate value. The fact that these numbers are listed in the manufacturer’s “limitation” section should provide sufficient reasoning should any “non-aviator” want to criticize any “no go” decision based on these numbers. Regardless, with the information provided here, I think you might feel a bit better in making whatever decision you make with respect to taking off with some level of crosswind.