Potential Vorticity anomaly over the East Pacific Ocean
![](https://cimss.ssec.wisc.edu/satellite-blog/wp-content/uploads/sites/5/2019/01/20190129180034_namer-1.jpg)
* GOES-17 images shown here are preliminary and non-operational *GOES-17 Air Mass RGB images from the AOS site (above) showed the characteristic signature of a Potential Vorticity (PV) anomaly over the East Pacific Ocean on 29 January 2019. A descending tropopause brought ozone-rich air from the stratosphere down to very low altitudes... Read More