A really bad summer storm that wasn't predicted came through, with large wind gusts and heavy rains and hail around the size of a 50cents piece. I wasn't expecting it to storm, so I was caught really offguard. 
The other night, the sky got really dark and it started raining really heavy and hailing. 
user
Oh that sounds ominous!
assistant
It was! I wasn't expecting a storm. The power went out. 
user
That sounds scary! I hope it all ended okay!
assistant