The calmest are stationary fronts: there are usually rather weak winds. Warm fronts often bring cloud-covered skies, high humidity, haze and fog, heat and rain for days, which is not good for pilots. It is also accompanied by updrafts which will help if you are going to float. In a warm front, warm air still rises up, but gradually squeezes out the cold air underneath.Ī cold front brings bad weather first, but then - a clear sky full of cumulus clouds, good visibility as well as low humidity. In the case of a cold front, cold air jumps under warm air, forcing it to rise up. The surface of the front is always sloping against the ground. In the Northern Hemisphere, warm fronts usually move from southwest to northeast, in the Southern Hemisphere - from northwest to southeast. Wind increase in a warm front is not as strong as in a cold front. That’s because it’s harder for less dense warm air to squeeze out denser cold air. In the Northern Hemisphere, such fronts usually move from northwest to southeast, in the Southern Hemisphere - from southwest to northeast.Ī warm front can also bring bad weather, but the rains can last the whole day or more, because its precipitation zone is much wider, and also it moves much slower than the cold one - 20-30 kilometers per hour or less. As a rule, such bad weather comes suddenly, but it does not last long: a cold front moves rather quickly - up to 80 kilometers per hour. Valerya Milovanova / Windya.pp What do fronts bring with themĪny front brings weather changes, including those of the strength and direction of the wind.Ī cold front is more dangerous, as it often brings squally winds, thunderstorms and rains. If a cold front catches up with a warm front and closes in on it, it is an occluded front. The slowing down front, in which the air movement has practically stopped, is called stationary. Over time, the front can slow down and stop as the mutual movement of air mass slows down, or there are mountains or sea on the way. In forecasts, warm fronts are marked with red lines, cold fronts - with blue lines, with triangles and other figures indicating the direction and type of the front. If cold air moves into warm air territory, it is a cold front if warm air moves into cold air territory, it is a warm front. Let’s recall that the Earth’s atmosphere consists of air masses - air volumes varying in temperature and humidity, which constantly compete for the territory. In this new lesson of the Windy.app Meteorological Textbook (WMT) and newsletter for better weather forecasting you will learn more about what weather front is and how it works. A weather front is a place of collision of air masses, a boundary that is constantly in motion.
0 Comments
Leave a Reply. |