Yes, in addition to dust storms there are also sandstorms. But in Hawaii, for example, the dust helps banana cultures grow! And in the Caribbean sandy beaches grow. You’d think a dust storm would do nothing but harm - bad visibility, traffic disruptions, trouble breathing, etc. Usually, there is a period of several hours to 10 days between the moment the dust rises and the moment it settles. There, the dust either simply settles or is washed out of the atmosphere with precipitation. As a result, the warm and cold layers do not mix, and this allows the dusty layer of air cross the entire ocean and get to America. Cold air is below warm air, which means it is not able to rise. When the air mass enters the ocean, it is above a colder and wetter atmospheric layer. The surface of the desert warms up during the day and this contributes to the rise of air (convection), and with it - dust particles. An interesting thing happens regularly when the dust is transported from the Sahara to the west across the Atlantic Ocean. When the wind rises the dust from the ground, it continues to rise into the atmosphere because of so-called convection currents - warmer and lighter air from the heated surface rises upwards as long as it is surrounded by colder air.įrom there, all this dust is carried by the wind in a layer several meters to several kilometers high. Something like a dust storm can be seen when you go into the water from a muddy bank and it starts to blur as the silt rises from the bottom. When these particles repeatedly hit the ground and each other, they create fine dust. When the wind speeds up over bare dry soils (and it also speeds up due to the lack of trees and other plants), loose soil particles begin to vibrate: first, a little, and then, after speeding up, “jump”. There is very little moisture in the air, so the soil is also dry.ĭry soil is like flour - light and loose, and if you blow on it, it scatters in different directions. The stems and leaves of plants are, so to speak, a blanket that protects the soil from wind and sunlight.īut there are areas on our planet where nothing grows (or barely does). Moisture makes soil particles heavier and binds them together, just like water and flour do. Plants, in particular their roots, strengthen the soil and help it retain moisture. In this new lesson of the Windy.app Meteorological Textbook (WMT) and newsletter for better weather forecasting you will learn more about dust storm and how it works.ĭust storm Where does the dust come from? Scripps Company.In a nutshell: a dust storm occurs when a strong wind (more than 10 m/s) makes a huge amount of dust rise up into the atmosphere - millions of tons! This dust can be transported up to several thousand kilometers. Storm Shield App is made possible by The E.W. Storm Shield App is also your go-to daily weather app for get current conditions, hourly and daily forecasts to help plan your day. Multiple weather layers including radar, clouds, snow cover and more can be viewed on the map. In addition to severe weather alerts, users of the app can view NOAA severe weather alerts on the map to see where dangerous weather is happening. "Conversely, traditional county-based alerts can result in false alarms, warning you when your location in the county is not within the threatened area." "Storm-based alerts help reduce false alarms by alerting you to severe weather based on your exact location within a county," according to Storm Shield's developers. Storm Shield App provides storm-based alerts for tornado, hurricane, flood, thunderstorm, winter storms and other life-threatening weather events via voice and push notification. Named one of the best in the nation, Storm Shield App is available for iPhone and iPad on the Apple App Store, and Android on the Google Play Store.ĭownload Storm Shield App for iPhone and iPad For severe weather alerts on your iOS and Android device, Storm Shield App has you covered.
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