Final answer:
Given the weather report with a temperature of 68 degrees, 100% humidity, southwest winds at 5 mph, and falling barometric pressure, Justin should expect warm and wet weather conditions at school.
Step-by-step explanation:
Justin checked the weather report before coming to school with the following conditions: Temperature of 68 degrees, Humidity at 100%, Winds from the southwest at 5 mph, and Barometric Pressure that is falling. Based on these conditions, Justin should expect warm and wet weather at school today. The high humidity points to a lot of moisture in the air, which, coupled with falling barometric pressure, typically indicates impending precipitation and cloudy or overcast skies. The temperature suggests it will be warm, but not cold or dry.