AWIPS images of Suomi NPP VIIRS 11.45 µm IR channel and 0.7 µm Day/Night Band images (above) showed a night-time view of an intense mid-latitude cyclone that was centered just east of the Canadian Maritimes at 06:09 UTC or 2:09 AM local time on Read More

The vernal equinox — commonly referred to as the “first day of Spring” in the Northern Hemisphere — occurred at 11:02 UTC on 20 March 2013. A GOES-13 full disk visible image at 11:45 UTC (above) showed the cloud features on the sun-lit portions of the Earth at that time,... Read More

Hat tip to Luis Rosa at the National Weather Service forecast office at San Juan, who alerted us to the presence of an undular bore that was moving southward toward Puerto Rico on 14 March 2013. The southward propagation of the wave clouds associated... Read More

The 12–14 March 1993 “Storm of the Century” (aka “the ’93 Superstorm” or “the Great Blizzard of 1993”) was one of the most significant storms to impact the eastern United States (NWS Wilmington NC summary). McIDAS images of EUMETSAT Meteosat-3 Infrared (11.5 µm) channel images (above) showed the storm as it initially began to experience... Read More