Multiple Hailstones-single or multiple attack rolls?

[TessarrianDM]

The Hailstones spell (Spell Compendium pg. 109) creates 1-4 hailstones that require a ranged touch attack to strike the target(s). It is an instantaneous evocation. If you target more than one enemy with the hailstones, do you roll a single attack roll for all of the hailstones, or make an attack roll for each individual hailstone?

 

[joshjurg]

it does not specify, but with a instantaneous duration and a description that sounds a helluva lot like scorching ray, I would assume it mimics the multiple ray aspect of that spell.