Teresa....the barred owl almost always has a very gutteral
gurgle at the end of all of its vocalizations. The
monkey-like one may have been its agitated call which sounds
like an increasingly rapid series of agitated hoots, almost
always with a gurgle at the end in the case of the barred
owl. The standard barred owl call is an eight note call:
"who cooks for you, who cooks for you allll" and again has a
gurgle at the end with barred owls. They also make some
high-pitched locator calls which almost sound like a person
screaming and can be imitated by whistling.

Barred owls could easily be in your area.

The great horned is the other large owl possiblility. I
have not heard all of its vocalizations but its standard
call is a lower pitched "who's awake, me too" with fewer
notes than the barred. So based on the number of notes you
described I'd say its a barred owl.

Wayne Iverson
SE Seattle
wivers at seaccc.ctc.edu