1. NOVEMBER 13, 2013 Lab 9

2. Meteograms A time display of weather information for a single observing site

3. Temperature 21Z? __ Dew Point 6Z? __ Wind Direction 8Z?__ Pressure 03Z? __ 23°F 6°F W 1032mb

4. (20 POINTS!) Laboratory Exercise 14.10 a & b (20 POINTS!) 8 3.5 (Using Figure 15.40b)

5. Map of U.S.

6. Tornadoes – Suction Vortices Some of the most violent tornadoes contain smaller whirls that orbit around the center of the parent tornado, guided by the parent’s counterclockwise spin - Multi-Vortex Tornadoes. Suction Vortices – smaller, whirling offspring within a larger tornado Cycloid – looping damage path caused by a suction vortex

7. Tornadoes – Suction Vortices Source: wxbrad

8. Tornadoes – Suction Vortices Calculating maximum wind speed of multi-vortex tornado  Rotational winds = 90 mph  Moving North at 10 mph  Suction Vortex wind speed = 35 mph Maximum wind speed = (90 + 10 + 35) mph = 135 mph

9. Enhanced Fujita Scale Source: weather.com

10. Determining Wind Speed of Tornadoes ObjectWeight (lbs)Exposed Surface Area (ft 2 ) ¾-inch sheet of plywood 9032

11. Lab 9 Assignment 13.10 a, b, c 14.3 a, b 14.10 a, b (use fig. 15.40b for part b) (20 points!) 15.1 a, d (see p. 662) 15.5 a, b, c 15.6 Dillon’s OFFICE HOURS Thursday; 6ish-7:30; 6 th floor Walker; e-mail too! Ask Paul or Matt if unsure of theirs!