* GOES-16 data posted on this page are preliminary, non-operational and are undergoing testing *An eruption of Mexico’s Popocatépetl volcano — the largest since 2013 — occurred on 23 November 2017. The volcanic cloud was evident in GOES-16 “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.3 µm) images (above) as it drifted southward.... Read More

Satellites have the capability of allowing us to see things that may otherwise have gone unnoticed. The numerous bands available on #GOES16 shows an unusually shaped contrail over Barnes County ND, most noticeable in the water vapor bands. #ndwx #mnwx pic.twitter.com/OHqCF0bO6s — NWS Grand Forks (@NWSGrandForks) November 21, 2017 * GOES-16... Read More

A toggle between Terra MODIS and Suomi NPP VIIRS Red-Green-Blue (RGB) images, viewed using RealEarth (above), revealed the well-defined eye structure of Cyclone Numa over the Ionian Sea (between Italy and Greece) on 18 November 2017. Tracing its origin back to the remnants of Tropical Storm Rina (track), Cyclone Numa had acquired subtropical... Read More

Alaska’s first (official) surface air temperature of -40º or colder for the 2017-2018 winter season was reported by the Cooperative Observer at Chicken (-43ºF) on 19 November 2017. A NOAA-18 Infrared Window (10.8 µm) image at 0320 UTC (above) showed cold air drainage into river valleys, with the coldest infrared brightness... Read More