AWIPS images of the 1-km resolution MODIS fog/stratus product (above) showed areas of freezing fog that were persisting across parts of the Pacific Northwest region of the US during the pre-dawn hours on 10 December 2011. This freezing fog was causing a few traffic accidents on roadways across the region.On the previous... Read More
The VIIRS instrument on NASA’s recently-launched NPP satellite began to acquire imagery on 21 November 2011 (NASA news release). True Color Red-Green-Blue (RGB) images from two of the early satellite passes are shown, which cover a swath from Brazil to eastern Canada from 16:10 to 16:35 UTC (above) and another swath covering much of eastern... Read More
1-km resolution GOES-13 0.63 µm visible channel images (above; click image to play animation) revealed a mesoscale vortex (or “mesolow”) propagating slowly westward across the western end of Lake Ontario on 21 November 2011. The GOES-13 satellite had been placed into Rapid Scan Operations (RSO) mode, providing images as frequently as every... Read More
