Cumulus: cotton balls,

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Cumulus cotton balls, fair weather clouds.
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Stratus Low, blanket-like, gray
Stratocumulus- blanket of cotton balls
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Cirrus- high altitude, feathery, wispy, usually
made of ice crystals, can be a predictor of
precipitation.
Alto- prefix meaning high altitude Nimbus or
Nimbo- means precipitation
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Altocumulus- high, tiny ball of cotton.
Altostratus- high, thin blanket-like.
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Nimbostratus- low, blanket-like with precipitation
Cumulonimbus- thunder or anvil head tall,
billowy, usually a T-storm. Cold front.
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• Dew Point- temperature at which water vapor will
  condense into liquid. Depends on air pressure
  and relative humidity.
• Relative Humidity- Amount of moisture (water
  vapor) air contains based on the maximum it could
  hold.

High Pressure winter RH- 90 Low moisture, due
to dense air, less room for water.
Low Pressure summer RH- 90 High moisture, due
to less dense air, more room for water.