Water clouds, such as those that develop when fog and low stratus form, have different emissivity properties at short IR wavelengths (around 3.9 µm) compared to longer IR wavelengths (around 11 µm). At shorter IR wavelengths, water cloud do not emit as blackbodies, meaning less radiation is emitted than is... Read More
A comparison of AWIPS images of the Suomi NPP VIIRS 0.7 µm Day/Night Band (DNB), the 11.45 µm IR channel, and the 11.45-3.74 µm “fog/stratus product” (above) showed well-defined signatures of the aurora borealis (or “Northern Lights”) across central Canada on 09 August... Read More
An unusually strong area of low pressure moved northward into the Arctic Ocean and intensified during the 05 August – 08 August 2012 time period — a storm this deep (965 hPa central pressure) is exceptional for the Arctic Ocean region, especially during the summer month of August. A comparison... Read More
McIDAS images of 4-km resolution GOES-13 10.7 µm IR channel data (above; click image to play animation) showed Category 1 Hurricane Ernesto as it approached the far southeast coast of Mexico during the late afternoon and eary evening hours on 07 August 2012. The... Read More
