This is a picture looking towards the west. The criss-cross pattern of cirrus streaks is commonly seen before an approaching warm front. The cirrus streaks aligned in a southwest to northeastward direction are indicative of the advancing warmer air at higher levels, while the thickening of cirrostratus clouds to the west (as the sun is no longer clearly visible), signify the approach of a change in weather ahead.
With the progression of time, these clouds will likely thicken into altostratus and eventually into the lower and more dense nimbostratus, as the advancing storm gets closer and closer.
