A large and slow-moving occluded mid-latitude cyclone left a large swath of heavy snowfall across much of the north-central US during the 30 November – 02 December 2015 period. The GOES-13 water vapor (6.5 µm) images shown above (also available as a 62 Mbyte animated gif) revealed the unusually large size of the circulation... Read More
The Storm Prediction Center has revised its criteria for initiating GOES Rapid Scan Operations (RSO) calls. Previously, RSO was automatically activated when a Moderate Risk (MDT) appeared in the SPC Day 1 Convective Outlook. On October 1st that was changed per a September email from SPC:Starting October 1, the SPC Lead Forecaster... Read More
The Mount Rinjani volcano in Indonesia began a period of eruptions on 25 October 2015; the ash plume became very apparent on Suomi NPP VIIRS true-color Red/Green/Blue (RGB) images from RealEarth on 03 and 04 October (above). The volcanic ash disrupted flights at Denpasar Airport in Bali (the red dot at... Read More
A GOES-13 Visible (0.63 µm) image (above) showed a bank of fog and low stratus (FLS) covering much of the western portion of Lake Superior at 1600 UTC on 03 November 2015. Overlays of Metop ASCAT and Real-Time Mesoscale Analysis (RTMA) surface winds showed the long fetch of northeasterly winds... Read More
