Читать книгу Weather For Dummies - John D. Cox - Страница 47

During the most powerful storms of winter and summer you will probably find two air masses of very different qualities — different temperatures and humidities — crashing into one another. When upper winds and other conditions are right, this is where you will see a powerful mid-latitude cyclone with well-defined fronts that bring rain or snow over big sections of the country. In spring and summer, along these fronts can be long lines of severe thunderstorms that can form tornadoes when conditions are right — or wrong!

It might look like a rainy or snowy mess from down below, but a front, the transition zone or line between two distinct air masses, has a certain shape or structure to it, depending on what’s going on.