Predicting Weather Changes in Maria's Scenario

Maria is waiting for her friend, Lisa, to arrive at the park. She checks her watch, and it is almost 3 PM. Maria knows that they planned to meet at the fountain near the playground. As she sits on a bench, she sees a few clouds starting to cover the sun, and a light breeze begins to blow. Maria thinks to herself, 'I hope Lisa isn't running late again.'

If the weather continues to change, what can we predict about the next few minutes of Maria's waiting?