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AM4 would probably run into trouble finding just about anyone in the swirling snow. It does appear to have a nasty tendency to obstruct vision more than a few feet away. If he has another method of finding Sleet (or Kordak, not sure which he was after, but they're in the same place), however, it may lead him to the patch of field with Marty, most of the greater gnolls, and Drift.
Ordinarily this area would be well-guarded... but with the chaos and confusion, the storm, and the fear that AM4 seems to strike into the hearts of the lesser gnolls, arriving there wouldn't be altogether too difficult.
If he doesn't have another method of finding Sleet or Kordak, then he's in luck. Kremiir's spell has begun to lessen and the snow finally begins to settle, giving a mildly clearer view of the battle.