4834. PHOTOGRAPHY - 75 -300mm. Cumulus clouds Changi Airport

 

7 Feb 2026. 9.27am. Changi Airport
Bright blue sky with scattered white cumulus-like clouds 
Canon R5, 150mm, 1/2000 sec, f/5, ISO 100

Cumulus clouds are detached, white, fluffy clouds with cauliflower-like tops and flat bases, typically appearing in fair weather. Known as "heap" clouds, they form at low altitudes (below 2,000 m) due to convective, upward currents of warm air. They often appear in the morning, grow throughout the day, and evaporate by evening, though they can develop into tall cumulonimbus clouds. 

Key Characteristics and Types:

• Appearance: Distinct, sharp outlines with brilliant white, sunlit tops and darker bases.
• Formation: They are formed by thermal convection, where moist air rises and condenses, making them a sign of rising air currents.
• Species:
  • Cumulus humilis: Wide, flattened, and small, indicating fair weather.
  • Cumulus mediocris: Similar to humilis but with more vertical development.
  • Cumulus congestus (Towering Cumulus): Tall, cauliflower-shaped clouds that may produce rain and can develop into thunderstorms. 

Behavior and Weather Indicators:

• Fair Weather: Small, scattered cumulus clouds often signify pleasant conditions.
• Vertical Growth: If they grow vertically, they can indicate instability and develop into cumulonimbus clouds, producing showers.
• Diurnal Cycle: Over land, they form during the day due to solar heating and dissipate in the evening.
• Turbulence: They are often associated with turbulent air, which can cause bumpy flights for small aircraft.