NWS Forecast Office Phoenix, AZ

With the long residence time of the incoming low pressure system just west of the region, expect multiple rounds of showers with a few isolated thunderstorms Tuesday through Wednesday night across Southwest and South-Central AZ. Most likely rainfall totals across the AZ lower deserts will be 0.25-1.00", with higher totals in excess of 1.00" focused over foothills of northern Maricopa and La Paz Counties. Totals will be heavily dependent on where lines of showers/isolated t-storms set up and train over the same spot as they stream northward across the area.

Unsettled weather conditions will exist much of the week into the weekend with periodic chances for rainfall. The best chances will be centered over Southwest to South-Central Arizona Tuesday and Wednesday. Temperature throughout the week will remain below the daily normals with readings more than 10 degrees below normal midweek.