GOES-18 (GOES-West) Mid-level Water Vapor (6.9 µm) images (above) revealed a well-defined Foehn gap (narrow ribbon of darker blue enhancement) near the spine of the Sierra Nevada range in California, along with a broad “orographic crest cloud” (darker green enhancement) that extended eastward across southeast California into southern Nevada on 06 January 2024.The corresponding... Read More
10-minte Full Disk scan GOES-18 (GOES-West) Air Mass RGB images (above) showed a large cyclone as it deepened to a 936 hPa Hurricane Force Low while approaching the Aleutian Islands of Alaska on 02-03 January 2024 (surface analyses). The Sea Level Pressure dropped to at least 945.6 hPa at Dutch Harbor/Unalaska (METAR identifier PADU), which... Read More
Night Microphysics RGB imagery from the CSPP Geosphere site (link to a very similar animation to the one above) shows a line of tropical cumulus approaching Samoa. There are subtle color changes in that RGB that typically presage convective development (as also shown in this blog post, for example), and as highlighted in the annotated animation below that covers 0830-1230 UTC. The... Read More
A selection of several GOES ABI loops during 2022 showcased the diverse range of features observed, which included volcanic ash plumes, hurricanes, convection, fog, smoke, fires, dust and ice. It’s very hard to choose just one event from every month of the year, but the goal here is to show a variety of phenomena and locations that NOAA‘s GOES... Read More
