Eric Snodgrass

Eric Snodgrass >

25
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Extreme Weather Is Everywhere
Episode 1 of The Science of Extreme Weather
Survey the remarkable range of extreme weather around the planet. Then consider: Why does Earth have weather at all? Professor Snodgrass introduces basic features of the atmosphere that naturally lead to severe weather. He concludes by outlining the goals of…
Anatomy of a Lightning Strike
Episode 7 of The Science of Extreme Weather
Moment for moment, the one billion volts discharged in a typical lightning strike may be the most extreme of all weather phenomena. Watch lightning unfold in super-slow motion, and gain an appreciation for the exquisite complexity of this electrifying event.
Flash Floods and Deadly Moving Water
Episode 19 of The Science of Extreme Weather
Consider the deadly power of moving water. Explore scenarios for extreme flooding in flood-prone regions of the U.S. and consider past cases of extreme coastal floods, river floods, and flash floods. Study the meteorology behind these events, and hear flood…
Temperature Extremes and Cold-Air Outbreaks
Episode 2 of The Science of Extreme Weather
Discover the origin of Earth's great variability in air temperature, and learn how it also explains the seasons. Search for the highest and lowest temperatures on the planet, and the locations with the greatest difference between highs and lows. Along…
Lightning Extremes and Survival
Episode 8 of The Science of Extreme Weather
Investigate positive polarity lighting--a bolt up to ten times more powerful than normal lightning--which accounts for five percent of cloud-to-ground strikes. Then hear life-saving tips on how to recognize when you are about to be hit by lightning and what…
How Satellites Track Severe Weather
Episode 6 of The Science of Extreme Weather
Venture into space to see how different types of weather satellites chart large-scale extreme weather systems in both daylight and darkness. Compare two nearly identical hurricanes--one in 1900, the other in 2008--to highlight the life-saving capability of orbiting weather stations.
Tornadogenesis and Storm Chasing
Episode 14 of The Science of Extreme Weather
The genesis of tornadoes takes place under complex conditions that are still being deciphered by meteorologists who make detailed measurements from up close. Go inside a supercell thunderstorm to see a tornado being spawned. Then learn tornado safety tips and…
The Enormous Structure of a Hurricane
Episode 22 of The Science of Extreme Weather
How do hurricanes get so big? Start off the coast of West Africa to see how this region is the perfect breeding ground for low-pressure disturbances. Chart the role of the Coriolis force, water temperature, and other factors that must…
Supercell Thunderstorms and Hail
Episode 12 of The Science of Extreme Weather
Pound for pound, the supercell is the most powerful thunderstorm on Earth. Explore the mechanics of this system, which produces the strongest straight-line winds, the most violent tornadoes, and the largest hail. Close by looking at the formation of a…
Low Pressure and Earth’s High Winds
Episode 3 of The Science of Extreme Weather
Witness a demonstration of the power of air pressure and the ability of changing pressure to produce clouds. Learn how fluctuations in air pressure play a role in all weather, propelling everything from the ferocious winds of a tornado to…
Tornadoes and Their Amazing Winds
Episode 13 of The Science of Extreme Weather
Tornadoes hit all 50 states of the U.S. and most inhabited regions of the world. Blowing as fast as 200 to 300 mph, they are the most awe-inspiring of extreme weather. But what exactly are they? And why are they…
How Radar Reveals Storms
Episode 5 of The Science of Extreme Weather
In this and the next lecture, study the advanced technology that has revolutionized extreme weather forecasting. Here, look at how radar has vastly improved the prediction of tornadic thunderstorms. You've seen Doppler radar images in forecasts. Now learn how this…
El Niño and Cycles of Extreme Weather
Episode 24 of The Science of Extreme Weather
Close by investigating one of the most eventful weather triggers of all: the El Nino-Southern Oscillation, which starts as a warming trend in the eastern Pacific and can lead to extreme weather throughout the world. Our detailed understanding of this…
Storm Surge and Hurricane Intensification
Episode 23 of The Science of Extreme Weather
Hurricanes destroy life and property in four ways: through storm surge, inland flooding, high winds, and embedded tornadoes. Consider examples of each. Then focus on high water as the deadliest factor, responsible for 80% of all hurricane fatalities.
Epic Snowfall and the Lake Effect
Episode 17 of The Science of Extreme Weather
The region downwind from the Great Lakes is famous for its lake effect snowstorms, which can total more than 200 inches of snow per year for some locations. Examine the factors behind this phenomenon as well as the mortal danger…
Drought, Heat Waves, and Dust Storms
Episode 20 of The Science of Extreme Weather
From the American dust bowl of the 1930s to the relentless expansion of the Sahara in Africa, drought represents severe weather that can stretch out for years. Explore what's going on in the atmosphere to create extreme drought, which is…
Ice Storms: Freezing Rain Takes Over
Episode 16 of The Science of Extreme Weather
Begin the first of three lectures on winter weather by pinning down the cause of ice storms, which are beautiful but also dangerous and destructive. Professor Snodgrass demonstrates how supercooled water is the source of the freezing rain behind these…
Extreme Humidity, Rain, and Fog
Episode 4 of The Science of Extreme Weather
Severe weather is driven by water's ability to change phase--with energy being released during the transition from vapor to liquid, and from liquid to ice. Calculate the stupendous amount of energy brewing in a typical thunderstorm, and study cases of…
Blizzards and Winter Cyclones
Episode 18 of The Science of Extreme Weather
Look back at historical blizzards that paralyzed major U.S. cities. Then probe the official definition of a blizzard, the cold-weather cyclone systems that create them, and the revolution in forecasting blizzards since 1993. Focus on the role of the jet…
The Science of Extreme Weather
Thanks to an ongoing revolution in the science of meteorology, we can now understand how extreme weather conditions arise, produce far more accurate forecasts, and know how to protect ourselves when dangerous conditions develop. The Science of Extreme Weather is…
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