storm cloud

:  a disturbance of the atmosphere marked by wind and usually by rain, snow, hail, sleet, or thunder and lightning

:  a heavy fall of rain, snow, or hail

:  wind having a speed of 64 to 72 miles (103 to 117 kilometers) per hour

:  to blow with violence

:  to rain, hail, snow, or sleet vigorously

:  to attack by storm

:  a visible mass of particles of condensed vapor (such as water or ice) suspended in the atmosphere of a planet (such as the earth) or moon

:  something resembling or suggesting a cloud: such as

:  a light filmy, puffy, or billowy mass seeming to float in the air

:  to grow cloudy

:  to become troubled, apprehensive, or distressed in appearance

:  to billow up in the form of a cloud