Overall conditions for the weekend will be partly to mostly cloudy with most clouds concentrated in the upper levels on Saturday and in the (relative) low and upper levels on Sunday. The cloud cover will come as a result of moisture from the southwest as a longwave upper level trough slowly approaches from the west. A stationary area of low pressure at the surface is expected to the east of Colorado Springs, in the leeward side of the Rocky Mountains on Sunday This low will cause winds from the east to northeast over the region. Orographic lifting will allow air at the surface to rise and condense as it moves vertically up the mountain range. The addition of daytime heating will result in a chance of showers with thunderstorms possible Sunday afternoon.