They found that the rate of heat loss from the container could be determined from the air temperature and wind speed. This methodology is somewhat controversial because humans are considerably more complex than a pan of water and respond differently depending on age, size, health, degree of physical activity, etc. Exposed flesh will freeze within 30 seconds. During our recent spectacular lightning show I noticed that sometimes there was a greenish tint to the lightning. Lucy Baldwin - Palo Alto A. Clouds often take on a greenish hue before severe storms, but this is most often associated with hail.
Hail is usually part of a thunderstorm.
These tall, dense cumulonimbus clouds often block most of the sunlight, so the greenish tint may be a reflection of Earth's green foliage. However, the cause of the green tint has not been proven conclusively. The turbulence that affects aircraft is most often caused by wind shear in the upper atmosphere. Called clear air turbulence, it results when the wind is blowing at different speeds at adjacent altitudes. These wind speed differences allow pockets of rising or sinking air that can cause a plane to rise or fall hundreds of feet.