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Archive: Oct 2007

Lee waves downwind of the Baraboo Bluffs

“Lee waves” are sometimes seen just downwind of significant topography (such as high mountain ranges) when strong winds are perpendicular to the ridge lines — but even relatively subtle terrain features can produce lee wave clouds that are evident on satellite imagery (one such example of lee wave clouds in... Read More

Swaths of wet ground in the Plains

Clearing skies in the wake of a cold frontal passage on 08 October 2007 allowed AWIPS 4-panel images of the MODIS visible, snow/ice, 3.7µm, and 11.0µm IR window channels (above) to reveal extensive swaths of slightly darker (and slightly cooler) wet ground which were oriented southwest-to-northeast across parts of Texas,... Read More

GOES water vapor imagery: present, and “future”

AWIPS composite images of the 6.7µm GOES-11 and 6.5µm GOES-12 “water vapor” channels (above) show the eastward progression of synoptic-scale frontal systems across the US and Canada — as well as the westward motion of what could evolve into a subtropical disturbance in the eastern Gulf of Mexico — on... Read More