AWIPS images of the GOES-12 6.5 µm “water vapor channel” (above) revealed a pair of vortices immediately poleward of a well-defined jet stream  axis that was moving over the southeastern US  on 28 September 2009. It was initially thought that these... Read More

A curious image artifact was noted on MTSAT-1R 3.75 µm shortwave IR imagery, in the form of a very cold “false eye” appearing  just to the right of the actual eye of Typhoon Choi-Wan (17W) in the western North Pacific Ocean . The “ghost” of the eye exhibited a... Read More

Another one for the “What the heck is this?” blog category. Jeff Craven (SOO at the Milwaukee/Sullivan NWS forecast office) pointed out in an email:“The mid/high cloud deck in warm conveyor belt from OK into MO has an interesting strong subsident area over MO.... Read More

Kudos once again to David Zaff (National Weather Service Buffalo NY) for bringing another interesting feature to our attention. Dave sent an email mentioning a gravity wave that he saw on water vapor imagery propagating westward across the Gulf of Mexico on Read More