1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Visible images (above) showed fog/stratus that was moving southward across the far southern part of Lake Michigan on 25 April 2026. Plots of METAR surface observations highlighted how areas near the coast — where a lake breeze advected the fog/stratus inland — stayed significantly cooler (temperatures in... Read More
The morning of 5 March 2026 saw widespread fog over the Midwestern United States. The following animation shows the Day Cloud Phase Distinction RGB product from GOES-19 with some surface observations overlaid on top. The surface observations show just how widespread the fog was. The standard meteorological chart code uses two horizontal parallel lines to... Read More
An intriguing fog event took place over Lake Superior on Sunday, 15 February. On a day that was otherwise clear and unseasonably warm, fog crept westward as though it was trying to cover the entire lake. The following animation shows the entire day of GOES-19 true color imagery as viewed... Read More
A common sight on calm nights and early mornings is radiation fog: as the surface cools at night, the air above the ground cools as well. The absolute moisture content of the air remains the same, but since the temperature is dropping less water vapor can be contained in equilibrium... Read More
