Optional standard mileage rates for use of a vehicle will change a little for 2015, the IRS announced on Wednesday, with the business use rate going up and the medical and moving rate going down (Notice 2014-79).
Thunderstorms are caused by a collision of warm air and cold air. A thunderstorm is a cloud formation where large amounts of water undergoes a cycle of condensation, freezing then revaporizating as the currents of vapor within the cloud rises and falls. This produces static electricity which discharges as lightning. Thunderstorms are caused by a collision of warm air and cold air. A thunderstorm is a cloud formation where large amounts of water undergoes a cycle of condensation, freezing then revaporizating as the currents of vapor within the cloud rises and falls.
Rating Newest Oldest. Best Answer: The most basic conditions to produce thunderstorms and tornadoes are cold dry air and warm moist air. The warm air rises through the cold air and forms clouds. The stronger the differences between air masses; the more likely that a thunderstorm will form. However, when the air masses are very different, super cell thunderstorms occur and can produce tornadoes. http://en.wikipedia.org/wiki/Thunderstor... http://www.nssl.noaa.gov/edu/safety/torn...