2 Bell Work1. Using a psychrometer, figure the relative humidity in the classroom.2. Yesterday, there were high, curl or “wispy” clouds in the sky, indicating a change in the weather. What type of clouds were they?3. Which type of air mass may cause the type of weather we are seeing today?4. If thunderstorms were to roll in Mt. Gilead later on this afternoon, which kind of clouds would you expect to see?
3 Bell Work What do the following letters represent in an air mass? (m) (c)(P)(T)
5 Front1. Front-Boundary that forms when two different air masses meet
6 Cold Front Map symbol Weather Conditions Cold fronts move fast, producing thunderstorms, heavy rain, or snowCold air meets and moves a warm air mass
7 Warm Front Warm air meets and over-rides a cold air mass Map symbol Weather ConditionsNimbostratus clouds, Usually drizzly rainAfter the front passes, weather is clear and warm.Warm air meets and over-rides a cold air mass
8 Occluded Front Map symbol Weather Conditions Cool temperatures with large amounts of precipitationFast moving cold air mass overtakes a slower moving warm air mass. Warm air ↑
9 Stationary Front Map symbol Weather Condition Usually drizzly After the front passes, weather is clear and warmCold air mass meets a warm air mass with little horizontal movement