Wind is the movement of air that develops due to temperature differences in different parts of the world. The differences in temperature result in differences in density which results in differences in pressure. Wind results when these pressure differences try to normalize in an endless cycle of movement. Roger Hill explains the pressure gradient and what causes changes in wind …
Roger details how varying air and ground temperatures at different levels of the atmosphere can produce interesting forms of precipitation such as sleet, hail, or freezing rain, or a combination of precipitation types. Ever hear a forecast call for a mixed bag precipitation? This is what they’re talking about.
Roger talks about Equinox and Solstice, astronomic events that humans have observed for a very long time. Why don’t we see exactly 12 hours between sunrise and sunset during equinox? Roger talks about how latitude comes into the equation.
This week Roger goes over the different types of clouds, where they usually sit in the atmosphere, and how forecasters can tell what’s going on in the atmosphere by looking at them.
Sometimes during Vermont winters, some seismic events occur called Frost Quakes or Cryoseisms. This occurs when a frozen ground, saturated with moisture, cracks with high intensity in a very localized areas. Roger explains in great detail how meteorological indicators can lead to these Frost Quakes.
Sometimes during the winter, the right temperatures and wind conditions come together after a snow fall and create snow rollers, curls of snow that can be hollow or bunched up like a cinnamon bun. We discuss this phenomenon in detail. Have you seen snow rollers? Let us know in the comments or on the WDEV Facebook page.
Roger covers the Earth’s magnetic field and explores the South Atlantic Anomaly, a region over South America where the magnetic field is weakest that exposes satellites to high levels of radiation from space.
Often during a forecast, forecasters will talk about the various computer weather models and how they compare. What kind of skill is involved to interpret these and make a projection or forecast of what the weather will do? This podcasts gets into the science of weather models and also why the variables of the sophisticated analyses affects them so and …