AWIPS images of the MODIS visible and 2.1 µm near-IR “snow/ice” channels (above) showed areas of snow cover across parts of eastern Colorado, far northwestern Kansas, and Nebraska on 23 October 2009. Snow is a strong absorber at the 2.1 µm wavelength, so it appears very dark on the snow/ice channel image.The... Read More

AWIPS images of the MODIS visible channel, the 2.1 µm near-IR “snow/ice” channel, and the 3.7 µm shortwave IR channel (above) displayed a swath of snow cover on the ground in far northern Quebec, Canada on 04 October 2009. The Environment Canada Read More

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

An anomalous ridge of high pressure developed across western North America on 23 September 2009, bringing hot and dry conditions to parts of the Pacific Northwest states — high temperatures at many locations in Oregon were in the 90s and low 100s... Read More