A rare Full Moon on Christmas — the last occurrence was in 1977, and the next will be in 2034 — was reached at 1111 UTC, and provided some compelling “visible images at night” from the Suomi NPP VIIRS 0.7 µm Day/Night Band (DNB). The animation above shows the coverage of... Read More

The 2015 December solstice — Winter in the Northern Hemisphere, and Summer in the Southern Hemisphere — occurred at 0448 UTC on 22nd day of the month. Several hours prior to the solstice, the daylight/darkness “terminator” (tilted at 23.5º due to the inclination of the Earth’s axis) could be seen... Read More

GOES-13 (above) and GOES-15 (below) both captured the propagation of gravity waves that displayed Bore-like attributes along an inversion with a cold front over central Texas. (Click here for an animation of GOES-13 and GOES-15 side-by-side that includes observed surface winds).There was a temperature drop across the front, and modest wind... Read More

On 07 June 2007, severe thunderstorms moved through the Upper Midwest (blog post on that event), spawning strong tornadoes; from the SPC Storm Reports comments:HUNDREDS OF TREES DOWN NORTH OF ZOAR. (GRB) NUMEROUS TREES DOWN OF 1 FOOT DIAMETER AND GREATER. TRACK WAS APPROXIMATELY 1/4 MILE IN LENGTH AND 125 YARDS WIDE (MQT)Terra MODIS data on 09 June 2007 (in the image... Read More