(Image source: The CIMSS/SSEC MODIS Today Page)Lake effect clouds and snows are a common wintertime occurrence downwind of the warm waters of the Great Lakes, and such weather events have been discussed frequently on this blog (See here, here, and here, for example) and elsewhere. When cold air moves over a warm water surface,... Read More

Cold air in the wake of a strong cold frontal boundary and dynamics associated with an intense shortwave trough aloft contributed to an outbreak of lake-effect snow and very strong winds over the Upper Peninsula (UP) of Michigan on 27 November 2007. AWIPS images of the GOES-12 6.5 µm “water vapor” channel... Read More

GOES-12 visible channel images (above) revealed an interesting wave structure along the top of an extensive stratus cloud deck that covered much of Iowa, southern Wisconsin, and northern Illinois on 20 November 2007. An AWIPS 4-panel image showing the MODIS and GOES-12 visible and IR window channels (below) demonstrated the... Read More

A comparison of the MODIS “true color” RGB image (Red=channel 01, Green=channel 04, Blue=channel 03) and the corresponding “false color” RGB image (Red=channel 02, Green=channel 07, Blue=channel 07) from 19 November 2007 (above) shows snow cover over parts of New York, Vermont, New Hampshire, and Maine (extending northward into portions of southern... Read More