A blizzard could be on the way to the U.S.

The video tutorial discusses weather forecast models, focusing on a low-pressure system predicted to move along the US Southeast and Midatlantic coasts. It explains how pressure systems affect weather, with air moving from high to low pressure. The formation of blizzards is detailed, highlighting the role of cold and warm air interactions, moisture, and freezing temperatures. The tutorial concludes with the conditions necessary for a blizzard, as defined by the National Weather Service, including reduced visibility and high winds.

What is the primary cause of changes in weather according to the first section?

• The movement of tectonic plates

• The flow of air from high to low pressure

• The rotation of the Earth

• The position of the moon

In the formation of a blizzard, what happens to the warm air when it meets cold air?

• It sinks and warms, absorbing moisture

• It rises and cools, releasing moisture

• It dissipates into the atmosphere

• It remains at the same level, causing no change

What is a necessary condition for a blizzard to occur?

• Strong sunlight

• Temperatures below freezing at ground level and in the clouds

• High humidity levels

• Temperatures above freezing

According to the National Weather Service, how long must a snowstorm last to be classified as a blizzard?

• At least one hour

• At least two hours

• At least three hours

• At least four hours

What wind speed is required for a snowstorm to be considered a blizzard?

• Above 40 miles per hour

• Above 30.5 miles per hour

• Above 50 miles per hour

• Above 20 miles per hour