Check to see that the exterior of the window is installed right side up instead of upside down. There should be two horizontal slats in the bottom frame of the window that allows water to drain to the exterior. The upper slats on the top of the frame should have rubber pieces plugging those holes.
By the way, I'm in the Silver Lake area of Everett. If you ever need to compare or need an extra set of eyes on your Surveyor, let me know. We bought ours new from the dealer in Burlington in June of last year.
It's starting to get sunny here
2017 Forest River Surveyor 247BHDS...
...Tugged by a 2016 F250 XLT FX4 SuperCrew, Shortbed 6.2L, 4wd, 3.73...
...Joined with a Husky Centerline TS 800-1200lbs WDH