Cumulonimbus is a heavy and dense cloud of considerable vertical extent in the form of a mountain or huge tower, often associated with heavy precipitation, lightning and thunder.The mature Cumulonimbus cloud has a distinctive flat, anvil shaped top.umulonimbus is a heavy and dense cloud of considerable vertical extent in the form of a mountain or huge tower, often associated with heavy precipitation, lightning and thunder.
This is the next most formal wedding dress code and usually means the wedding is an evening affair. He should wear: A tuxedo. A black bow tie, cummerbund, and patent leather shoes are also suggested. She should wear: A chic cocktail dress or a long evening gown in a dark, neutral color like brown or black.
â¢For the men: A tuxedo or a formal dark suit, white shirt, and conservative tie. The Invitation Says: Semiformal or Dressy Casual. Take your cues from the time of the event: Wear darker, more formal colors for an evening wedding; opt for light colors and fabrics for a daytime event.