Posted in xn--kfs74mzzid01b.com edit by webmaster on January 7th, 2009
1. It's 2:00 A.M in the northeastern US. Thunderstorm rumbles on the horizon. What type is it mostly likely to be?
2.Why is the height of the tropopause a factor in how tall a cumulonimbus cloud can grow?The slope of a cold front is steeper than a warm front.The wind shift along a cold front is also more.Moreover a cold front moves faster than a warm front and replaces the warm air mass in front forcing it up at a faster rate leading to convection.
Above tropopause, the temperature starts rising with height leading to stable conditions in the atmosphere.Convection will not take place in such a stable condition.Clouds will not remain as clouds as the water vapor gets evaporated due to high temperature. More over
about 99 percent of the moisture is confined to troposphere only.Only air-mass thunderstorms have a strong preference for the afternoon hours.When a cold front come through your area it usually doesn't trigger any thunderstorms because there is not enough heat in the atmosphere nor humidity in the air. For instance, say summer is here again and a really strong cold front came through your area and triggers thunderstorms, around say like noon to 3 pm thunderstorms start to develop in or around your area and it during the day time heating of the day then you'll have a better chance of seeing thunderstorms in or around your area and may come severe complexes or clusters then it may produce tornadoes and hail up to the size of walnuts and could even produce very Strong winds and a small micro bursts, that could really knock you off your feet if the micro bursts are strong enough.A cold front doesn't necessarily create thunderstorms but the the weather is more "severe" because it has a steeper slope then a warm front. If a thunderstorm is hitting you at 2 am it is caused by a frontal passage and the tropopause limits cumulonimbus growth because it is a stable layer (warms with height) and prevents and further vertical growth.#If you have any other info about this subject , Please add it free.# |
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