1. Lab 9 – Due Nov 14 Chapter 13 10a,b,c Chapter 14 3a,b Chapter 15 1a,d 5a,b,c 6 8a,b,c 11a

2. Chapter 13 Problem 10a,b,c I say front came through at 25/07 Pressure is lowest and wind changed direction Before: ΔT = 5⁰F, ΔT d = 0⁰F After: ΔT = 20⁰F, ΔT d = 10⁰F

3. Chapter 14 Problem 3a,b - Assessing stability a) Layer is 3000m or 3km Temperature difference is 17⁰C 1.Dry adiabatic lapse rate is 10⁰C/km, In 3km a parcel decreases 30⁰C (to 4⁰C), the parcel is colder than the environment and would sink 2.Moist adiabatic lapse rate is 6⁰C/km, in 3km a parcel decreases 18⁰C (to 16⁰C), the parcel is cooler than the environment and would sink 3.So layer is stable b) Layers have changed height so first we must determine the temperature at the new altitudes. 1.Bottom layer was saturated use moist adiabatic lapse rate: 34⁰C - 6⁰C = 28⁰C 2.Top layer was unsaturated use dry adiabatic lapse rate: 17⁰C -10⁰C = 7⁰C a)5000 m 2000 m 17⁰C 34⁰C b) 6000m 3000m 7 ⁰C 28⁰C b) Cont. 3.Re-assess stability: Temperature difference is now 21⁰C 4.Using dry, parcel cools 30⁰C (to -2⁰C) cooler than environment and will sink 5.Using moist, parcel cools 18⁰C (to 10⁰C) warmer than environment and will rise 6.So layer is now conditionally unstable …Now lift entire layer 1000m… Unsaturated Saturated Unsaturated

4. Chapter 15 Credit: www.dusksters.com Problem 1a,d(see page 662)

5. Chapter 15 Problem 5a,b,c Don’t forget that winds are calculated by adding the translation (speed of the storm) and (+) any rotational winds speeds Which side of the storm has the fastest wind if the storm is moving North? South? Enhanced Fujita Scale

6. Chapter 15 Problem 8a,b,c - What do we know about tornadoes? If we look back at 1a, the graphic indicates the US see 908 tornadoes a year. Are they all EF5? What do we have that helps us track storms? What kind of storm spawns a tornado? Page 650 may help you out here. Below is all I’m gonna give you for part c.

7. Chapter 15 Problem 11a What happens in a downdraft? Is air going up or down? What happens to air that sinks? Do clouds form or vanish? Why??

8. Lab 9 – Due Nov 14 Chapter 13 10a,b,c Chapter 14 3a,b Chapter 15 1a,d 5a,b,c 6 8a,b,c 11a