alarming
cloudy
about to be
abusive
already in sight
apocalyptic
approaching
at hand
bad
baleful
baneful
black
bludgeoning
blustering
bodeful
boding
brewing
browbeating
bulldozing
bullying
close
close at hand
coming
comminatory
critical
dangerous
dangersome
dark
denunciatory
dire
doomful
dreary
evil
evil-starred
explosive
fateful
fear-inspiring
foreboding
forthcoming
fraught with danger
future
gathering
gloomy
going to happen
hectoring
ill
ill-boding
ill-fated
ill-omened
ill-starred
immediate
threaten