Weather

Posted by Keshav Jain on


 



Thunderbolts



A lightning strike discharges about 100 million volts of electricity, and heats the air in its path to more than 33,000°C.The lightning strike travels at 299,792 km per second, which is almost the speed of light. A strike between a cloud and the ground may be 14 km long, and a strike between clouds can be over 140 km long.



Ball lightning is a small fiery ball which occasionally appears during thunderstorms. There is no accepted scientific explanation for it. 



Picture credit: google



 



 





How can forecasters predict the weather?



Meteorologists use a wide range of instruments and techniques to help them track changes in the weather and to predict future weather conditions. Weather forecasters have used simple instruments such as thermometers, rain gauges, barometers and wind gauges for many years, but the advent of satellite photography has transformed weather forecasting. Weather satellites can track the movements of clouds, and show the positions of high and low pressure areas and weather fronts. Radar measures the size, speed and direction of storms, so accurate warnings of severe weather can be given. With the use of computers, increasingly accurate forecasting is now possible.



Picture credit: google


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