WEATHER FORECAST FOR PRESENT WEEK WASHINGTON. Aug. 31. Worm weather In the east and southwest and a cool wave in the northwest were predicted pre-dicted tonight by the weathor bureau exports ex-ports for the first part of tho coming week. "It is likely." the weekly bulletin said, "that this cool chango will advance eastward east-ward and' overspread tha plalne states and the upper MJs3S3lppl vallev by Wednesday Wed-nesday or Thursday. Local "frosts will occur by the middle of tho week in the far northwest. "A disturbance that Is now over the northern Rocky Mountain region will move eastward, attended by local showers show-ers and thunderstorms, and cross the great central valleys Tuesday "