Sentence:  She wakened in sharp panic, bewildered by the grotesquerie of some half-remembered dream in contrast with the harshness of inclement fact, drowsily realising that since she had fallen asleep it had come on to rain smartly out of a shrouded <WSD>sky</WSD>. 
Meaning of the word marked with <WSD> tags:  The part of the sky which can be seen from a specific place or at a specific time; its condition, climate etc.