On 20 November, at 0922 UTC, the GOES-13 Sounder experienced an anomaly (the GOES-13 Sounder had Filter Wheel anomalies in 2012 as well: Link; Link). GOES Engineers determined that the Filter Wheel had stopped moving (the filter wheel aligns the infrared detectors with the incoming data) so data were not... Read More
An EF-1 tornado was on the ground for about 20 minutes near Denair (Local Storm Report | Facebook post) in central California on 15 November 2015. 1-km resolution GOES-15 Visible (0.63 µm) images (above) showed that clusters of small thunderstorms rapidly developed in an environment of instability along and just behind a fast-moving cold frontal... Read More
A severe hail-producing thunderstorm moved over northeast Nebraska before noon on 22 September (SPC Storm Reports). The region hit was just south of a Marginal Risk of Severe Weather (The update at 1630 UTC included the region of severe weather). The GOES-13 visible animation, above, shows the initial development occurring along a subtle cloud line aligned mostly east-west.The NOAA/CIMSS ProbSevere model produces... Read More
Strong thunderstorms developed over the upper midwest ahead of a cold front in the afternoon of 2 August 2015. Large Hail (up to 4.25″ diameter in Ogemaw County Michigan) fell and strong winds were observed (up to 70 mph in Portage County Wisconsin) over parts of eastern Wisconsin and lower Michigan. (SPC Storm Report). The visible... Read More
