The Great Lakes have a significant amount of thermal mass, meaning it takes a long time for them to cool down as the seasons change from summer to autumn. Often during this time of year, the air overlying the lakes is warmer than the lakes themselves. As water evaporates from... Read More

Significant convection across the northern continental United States has had some notable impacts on the aviation network over the past few weeks. On Wednesday, 30 July, Delta Flight 56 was en route from Salt Lake City, UT, with an intended destination of Amsterdam. Shortly after takeoff at 4:30 PM local... Read More

5-minute PACUS Sector GOES-18 (GOES-West) daytime True Color RGB and Nighttime Microphysics RGB images created using Geo2Grid (above) revealed the cyclonic circulation of a Mesoscale Convective Vortex (MCV) that migrated west-northwestward across southern Arizona into southeast California (not far south of the California/Nevada border) during the 2-day period from 16 July to 18 July 2025. This MCV... Read More

1-minute Mesoscale Domain Sector GOES-18 (GOES-West) GeoColor RGB images with an overlay of Next Generation Fire System (NGFS) Fire Detection polygons (above) showed the rapid growth of the Cram Fire in central Oregon during the day on 14 July 2025. Strong westerly winds helped to transport a dense veil of smoke eastward. This wildfire had started... Read More