1. Meteo 003 Lab 7 Due Friday October 23 9.3abc, 9.12, 9.15abc, 9.16 10.1ab, 10.2ab, 10.3

2. 9.3 A) Average occurrence of thunderstorms – Ex) January 0.4 per month B) Do more thunderstorms occur during the warmer or colder months in San Francisco? C) Think about ways to destabilize the troposphere: – Heat below or cool above – Look at climatology map to determine which situation occurred.

3. 9.12 Terminal Velocity = 1750 * √(Diameter) – Units are in cm/s – Convert to mph 6.2137*10 -6 miles = 1 cm 3600 seconds in an hour

4. 9.15 A) Lake breeze front will be at the boundary of clear skies and clouds. – Winds will blow perpendicular to front. B) Draw arrows showing wind direction AND write the wind direction of EACH location. C) Time of year image was taken. – How do water temperatures compare to the surrounding land in summer, winter? – Are cumulus clouds more likely to form over a relatively cool surface or relatively warm surface?

5. 9.16 Match locations to descriptions Visible satellite image, white patches correspond to clouds Note location of the Appalachian Mountains. Image was taken in July, lakes relatively cool compared to land.

6. 10.1ab ITCZ (Intertropical Convergence Zone): Elongated area that separates the trade winds in the Northern Hemisphere from their counterparts in the southern hemisphere. The ITCZ tends to follow the sun’s direct rays Land heats more intensely than water, less land means more even distribution of heating.

7. 10.2 A) Isohyets are isopleths of precipitation. – Draw 50, 100 and 150 inch isohyets. B) Use the contour map to help explain. precipitation pattern. – Prevailing low level winds are northeast trade winds. – Precipitation pattern of the windward vs leeward side of a mountain.

8. 10.3 El Nino: Anomalously warm waters in the equatorial central and eastern Pacific La Nina: Anomalously cold waters in the equatorial central and eastern Pacific. Neutral (“La Nada”): Somewhere in between, neutral or average Pacific temperatures.

9. 9.3abc, 9.12, 9.15abc, 9.16 10.1ab, 10.2ab, 10.3 Thursday Office Hours: Astrid (ais5396@psu.edu): 10-11 AM in 511 Walker Josh (jig5374@psu.edu): 2-3 PM in 6 th Floor Walker Wx Center Zach (zmg5025@psu.edu): 4-5 PM in 6 th Floor Walker Wx Center