Vriend Weather 3 Flashcards
The most common and widespread of all weather-related disasters happening along the Mississippi River right now is what?
Flooding
What is a storm surge?
It happens during a hurricane when winds are blowing onto the shore. These high winds can create very high waves which can flood the shore.
When does the National Weather Service issue a severe weather warning?
The National Weather Service issues a severe weather warning when severe weather such as a tornado or thunderstorm is occurring or is imminent (happening now). It means people should take cover or get to a safe location.
The NOAA will upgrade a tropical storm to a hurricane if its winds reach how many miles per hour?
74 mph
Today, meteorologists predict weather based primarily on what?
Air mass movements
What is air mass?
A large body of air that has about the same conditions throughout.
Humidity, precipitation and wind all play a role in defining what?
Weather
Air mass is determined by what two major factors?
Temperature and air pressure
Air masses tend to flow from areas of high air pressure to low air pressure or low air pressure to high air pressure?
High to low.
What does the atmosphere do for life on Earth?
Protects from the sun’s harmful rays
Controls Earth’s temperature
Has gases necessary for life to exist
Today, WEATHER PREDICTIONS are based primarily on what?
Air mass movements
When is air pressure usually highest?
When the weather is fair
When is air pressure usually lowest?
During Inclement or stormy weather
