Screaming or howling in Spokane County, Washington

Heard: at approx 2:15am my labrador retriever started barking at something outside. This is not unusual as we live on a closed golf course which is adjacent to Riverside State Park and we often have varying types of nature near our home. After letting the dog out to relieve himself I returned to bed. Outside temp was approx 55-60 degrees and we had the bedroom windows open. Our bedroom faces the closed golf course. What I heard next was a loud howl. At first I thought it was a police car or ambulance traveling on highway 291 that had turned on its siren, but then the sound simply went from soft to loud to suddenly stopping. So, it was not a siren. I listened intently to try to figure out what was going on and about 2 minutes later I heard a similar but more faint "siren" sound. This was not a coyote or a wolf, nor was it the sound of a neighbor's dog. The sound was different and as I said, it sounded like a siren with only one whooooooo. I noted the time (2:20am). It sounded like it could have been a few blocks away (I thought around 7 Mile Road). I have been checking local websites and facebook groups to see if anyone else heard it, but so far nothing. I can't be the only one to have heard this. Perhaps a person was making the noise as part of Big Foot hunting?? The other thing I'd like to report is that we feed birds and squirrels in our yard. Approx 6weeks prior we had our squirrel feeder torn off the tree at night. We heard a crash outside and couldn't identify anything that particular night but the following morning we discovered the feeder's lid which is crewed into the top on a heavy hinge, was ripped off. We jokingly said maybe we should look for Big Foot prints or hair in the area. Anyway, the howl was definitely something not of the ordinary. Thank you.