While observing a beautiful sunset sky in your backyard in Daytona Beach, Florida, you observe altocumulus clouds moving across the sky from southwest to northeast. Using concepts discussed in chapter 8 regarding geostrophic wind and Buys-Ballot’s law, explain how the observed cloud movement allows you to determine that, in the upper levels of the atmosphere, lower pressure is northwest of your location. (It may help to make a sketch of the scenario.)