![](https://inside.nssl.noaa.gov/nsslnews/wp-content/uploads/sites/21/2011/07/PHXSTorm3.KH_-150x150.jpg)
NSSL’s dual-polarized mobile Doppler radar was used to study the skies during dust storm events in Arizona.
NSSL’s dual-polarized mobile Doppler radar was used to study the skies during dust storm events in Arizona.
A wall of dirt engulfs the Phoenix metro area for the second time in July, 2011.