 Arizona News Radio. A special weather statement has been issued by the Phoenix National Weather Service for the area of Casa Grande and Sacatonin. Winds of up to 55 miles an hour are expected, along with blowing dust and heavy rains. Temperatures will be rising this week, possibly hitting 115. But Phoenix National Weather Service meteorologist Gabriel Lajedo says we start the week with a decent chance of a monsoon storm. Sunday will have the best chances as we expect a cluster of thunderstorms.