Reply #1: This is nothing new - spectacular -a monsoon season phenomena

[Bobbieo]

I remember one afternoon in the early 60's I walked out out my house in Scottsdale about 5 pm to see a 1,000 foot wall of dust coming from the east which was highlghted by the setting sun. It was the most spectacular sight I have ever seen in my life!

Sixty seconds later the street lights went on in the area. I remember all we got was dust - Glendale got the rain.