It's really quite simple.
Brigit has informed him of a ton of occult happenings around Sacramento, but suggested that, if he wants to know more, he should see an Ithaeur. Now, Allen was quite knowledgeable himself in matters magical and hidden, but you just can't beat a Crescent at this stuff and besides - they will have something this Storm Lord lacks: local experience.
Therefore, not knowing said Ithaeurs' names or hideouts, it left him the Tur to stalk. Time was on his side - with the waning Crescent Moon in the sky, a Spirit Master is bound to show up at some point. Sure, it will probably take more than one night of fruitless waiting, but Allen can be all patience when he wants to be.
This is one such night. Allen Brackett, the newest member of Clarion Call, sits in plain view at the Tur. He is, of course, in his human form, and that form wears the same gray suit that it was wearing when he was inducted into the pack.
His eyes piercing the night's darkness, Allen waits.