1-minute Mesoscale Domain Sector GOES-19 (GOES-East) daytime True Color RGB images created using Geo2Grid (above) showed blowing dust (shades of tan) — lofted by strong southerly thunderstorm outflow winds with gusts as high as 60-70 mph — as it moved northward across northeastern Illinois and northwestern Indiana (and eventually southern Lake Michigan... Read More

A negatively tilted shortwave trough and associated dynamical response created a rapidly deepening surface low in the Dakotas on May 15. These features worked together to bring high theta-E air from the southern U.S. up into Minnesota and Wisconsin, creating ample instability in the region. A strong mid-level jet streak... Read More