Rapaire,

The missle used was designed for anti-MISSILE use. the fact that the satellite was significantly higher ( and faster) than a ballistic missile might have had some impact on the idea that the weather might matter.

As for the target not maneuvering, a ballistic missile ( the designed for target of the anti-missile) has rather limited ability to change trajectory, if it is going to hit the desired target.

As of now ( counting this) the US Navy has a 13 out of 15 success rate in hitting the target with an anti-missile. And those others were tests, with experimental ( ie, not production) missiles.