storm warning
noun
1
a
: a display of storm signals
b
: a notification (such as a radio report) that gives warning of an approaching storm
2
: a happening that warns of a difficult or involved state of affairs lying ahead
the storm warnings he sees for education 
Saturday Review
Saturday Reviewthe surest storm warning that something exciting was about to happen John Mason Brown
John Mason Brown- be living on borrowed time
- be made of sterner stuff
- be made of sterner/tougher stuff
- be made of tougher stuff
- be my guest
- be mysterious
- be no respecter of persons
- be not a patch on
- be of good cheer
- be of service
- be of the opinion
- be off
- be on a short fuse
- be on intimate terms
- be on one's merry way
- be on the lookout for
- be on/have a short fuse
- be one's own boss
- be one's own man
- be one's usual self
- be oneself
- be out of a job
- be out of breath
- be paid up
- be partial to