At 2027 UTC storm near Perham showed a strong decrease in cloud top temperatures as indicated by GOES-16 Clean IR imagery. Values fell to -66.4 C at this time, with a gradual warming to -60 C by 2037. At the end of the loop below, another strong updraft pulse was noted with a minimum temperature of -69 C. Point soundings for a mixed layer parcel via the RAP suggest equilibrium temperatures around -50 C. GLM Data also indicated an increase in storm intensity. At 20:27 UTC 191 GLM flashes were indicated, this climbed to a max of 242 by 2030 UTC. The biggest minute to minute change occurred at 2029 UTC with an increase of 34 flashes in a minute.
2027 Satellite/Radar comparison showed how important using radar data to fine tune the location of the actual storm when using GOES data. The paralax error in position was apparent in the images below. Note where Perham is for a spatial reference.
-JRM
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