Bright stationary light seen in NW sky.At approximately 0155 noticed a bright light located approx 30 degrees up from the horizon in the northwestern sector of the sky. Sky was cloudy and it was snowing off and on. The light remained in a fixed position for approximately 10-15 mins and then slowly began to drift in a northly direction. The brightness of the light remained the same throughout the sighting until it just vanished. It must be noted that the drift was at a extreme slow pace. I was a law enforcement officer for 14 years and for the past 10 years have been a boiler plant operator and work shifts, which has afforded me the opportunity to observe the night sky at all different times of the night. In my company at the time of the sighting was a federal law enforcement officer and both of us agree that it was to cloudy to be a star. It must be noted that Walla Walla is a small community and although there are occasions for airplane traffic in this area, there were no scheduled flights for this time of night.