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.
Thunderstorm. 1  Distribution: Worldwide, except Antarctica; common in the tropics. 2  Height: 2000 to 35,000 feet. 3  Cause: Powerful convection assisted by atmospheric instability. 4  Associated Weather: Heavy rain or hail, strong winds. 5  Hazard Warning: Lightning, wind, hail, and tornadoes; severe turbulence in cloud.