Welcome To Class If Minnesota is experiencing cold, wet (snow) weather, what kind of air mass might...
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Transcript of Welcome To Class If Minnesota is experiencing cold, wet (snow) weather, what kind of air mass might...
Welcome To Class
If Minnesota is experiencing cold, wet (snow) weather, what kind of air mass
might be affecting us?
Air Masses• Large body of air with uniform characteristics
• Continental – form over land, dry
• Maritime – form over oceans, moist
• Tropical – warm
• Polar – cold
Fronts
• Cold Front• Warm Front• Stationary Front• Occluded Front
• Page 605-606
• Four corner fold• Each type of front• Picture of each with
symbols used weather map
• Description of each• Clouds formed• Precipitation (if any)/
weather
Cold FrontWeather Phenomenon
Before Front During Front After Front
Temperature Warm Suddenly Cooler Steadily Cooler
Pressure Low Low, then increase
Increasing Steadily
Precipitation Mild Severe Mild
•Usually bad weather
•Colder after they pass through
•High pressure – cold air is more dense than warm air
Warm FrontWeather Phenomenon
Before Front During Front After Front
Temperature Cool Warming suddenly Warmer, then leveling off
Pressure Decreasing Suddenly
Leveling off Slight rise followed by decrease
Precipitation Showers, snow, sleet, or drizzle
Light Drizzle Usually none, otherwise mild
•Mild Weather
•Low Pressure
•Warmer temperatures (often humid)
Question
After a major thunderstorm in the summer, what kind of front do you believe would be present? What would the pressure feel like?
Severe Weather
• Any weather that may cause property damage or loss of life
• Rain, hail, lightning, strong winds, tornadoes
Tornadoes
• destructive, rotating column of air with very high wind speeds and visible as a funnel shaped cloud
Measuring WeatherWith your partner, find out how to measure the following
• Air Temperature
• Air Pressure
• Wind Speed
• Wind Direction
• Humidity
Page 611-612
Weather Map
Cold Front Warm Front Stationary Front Occluded Front