GOES-12 visible images (above) showed a nice example of convective initiation along an outflow boundary from thunderstorms a few hours earlier across northeastern Iowa on 25 June 2009. This new convection that developed along the outflow boundary produced hail of 1.5 inch in diameter and damaging winds in extreme northern Illinois (just... Read More

A small “dry swirl” feature (yellow color enhancement) was seen on AWIPS images of the GOES-12 6.5 µm water vapor channel (above) off the East Coast of the US on 24 June – 25 June 2009. A comparison of a GOES-12 water vapor image with the corresponding GOES-12 sounder Total Column Ozone product... Read More