The Masked Woman has already spent her Free Action so she'll spend a Simple on Ready Weapons. Her Reaction seems too low to reliably perform a Quick Draw maneuver, although I suppose the odds of glitching are probably slim. She'll take the slow, methodical approach for now, so AGI / 2 = 3 throwing knives at the ready.
It occurs to me that I don't know her Throwing Weapons skill yet so I am uncertain what to roll. She'll be advancing toward the vehicle to get some LOS and to get out of the glare of the headlights. Is there an attack penalty for walking? It used to be -1 in Arsenal. In 5E, Run & Gun has optional rules (RG3 on p. 108) but those seem to be based around negative modifiers for attacking a walking target, not for the attacker walking. Someone let me know if I completely misread that.
I'm guessing Range is Medium (short is 4 meters, medium is 8). Not to gimp myself unduly, but it seems like Wind would be an environmental modifier too.
AP1
Free Action: Comm a phrase
Simple Action: Ready weapon
Simple Action: Throw weapon
Non-action Action: Advance toward target at a walk, maybe taking cover against the side of the van after the throw if that's plausible