thundercloud
Ominous dark mass
A thundercloud is a large, dark cloud that produces thunder and lightning—technically a cumulonimbus.
The word also describes a person's angry or threatening expression: His face was a thundercloud when he heard the news.
Both uses emphasize darkness and the promise of an impending storm.
Atmospheric electrical discharge
- boltThreaded rod for nuts
- strikeForceful impact or stoppage
- flashBrief burst of light
- rumbleLow rolling sound
crack · boom · deluge · torrential · rainfall · squall · gust · tempest
Towering storm-producing cloud
- thunderheadTall storm-producing cloud
- nimbusLuminous disk or raincloud
- anvilMetal-shaping block
- supercellRotating severe thunderstorm
updraft · downdraft · squall · cell · convective · towering · mammatus · mesocyclone
Sky fully veiled
- gloomPervasive dimness or dejection
- darkAbsence of light
- murkyDark and unclear
- shadowyObscured by darkness
dim · lowering · brooding · blackening · grey · leaden · ominous · menacing
Suggesting something bad approaches
- menacingConveying threat or danger
- threateningExpressing intent to harm
- portentSign of future calamity
- warningAlert about danger
harbinger · looming · gathering · brewing · approaching · impending · dread · apprehension
lightning
Atmospheric electrical discharge
rumble · crack · boom · deluge · torrential · rainfall · squall · gust · tempest · cloudburst
cumulonimbus
Towering storm-producing cloud
- thunderheadTall storm-producing cloud
- nimbusLuminous disk or raincloud
- anvilMetal-shaping block
supercell · updraft · downdraft · squall · cell · convective · towering · mammatus · mesocyclone · precipitation
overcast
Sky fully veiled
shadowy · dim · lowering · brooding · blackening · grey · leaden · ominous · menacing · gathering
ominous
Suggesting something bad approaches
- menacingConveying threat or danger
- threateningExpressing intent to harm
- portentSign of future calamity
warning · harbinger · looming · gathering · brewing · approaching · impending · dread · apprehension · premonition
anger
Intense hostile emotion
scowl · glower · mood · temper · expression · brow · face · countenance · stormy · brewing
- skyblue sky, sun, moon, stars, open sky
- Lightninglightning, lightning bolt, lightning strike, bolt, flash
- Thunderrumble, boom, crack, roll, peal
- Blue-Grayblue gray, slate blue, steel blue, cool gray, steel gray
thundercloudclear sky
Atmosphere without clouds
blue sky · cirrus · sunshine · sunny skies · wispy cloud
thundercloudray of sunshine
Incurably upbeat person
sunny disposition · silver lining · sunshine and rainbows · bright spot · cheerfulness