Final answer:
During a snowstorm in Chicago, the upper air temperature is colder than the surface temperature, the air pressure is lower than normal atmospheric pressure.
Step-by-step explanation:
In order to identify the possible upper air temperature, surface temperature, and air pressure of Chicago on a day with a predicted snowstorm, we need to understand the general weather patterns in Chicago during snowstorms.
During a snowstorm, the upper air temperatures tend to be colder than the surface temperatures. For example, the upper air temperature might be around -10°C, while the surface temperature could be around -2°C.
The air pressure during a snowstorm can vary, but it is usually lower than normal atmospheric pressure. It could be around 29 inches of mercury or even lower.