Tropical moisture will bring periods of rain and thunderstorms with the threat of flooding for the end of the workweek.

THURSDAY: FIRST WARN - Rain likely at times, especially in the morning and late-day. The chance of rain is 70%. Highs in the low 80s. FRIDAY: Partly cloudy with highs in the low 80s.

The Valley will see a quiet night with cooler temperatures, and a high of 102 degrees on Wednesday with a slight chance of a dust storm in the evening.

Periods of showers and thunderstorms are expected through the weekend, along with cooler and less humid conditions.