Well, I don't think it's exactly clear that it's a shield-removing storm. I mean, the two ships *are* only frigates. How many frigates do you make with shields? You can tell both are frigates because it shows the design report for the red-flag one in the third screen shot, and the fourth screen shot shows the brown-and-green flag ship details on the bottom. Both clearly say "frigate"
Something to note, neither of those flags are from the "standard" races shown in the Quick Start screenie. The red-flag one looks like a Starfury Xiati destroyer, and the other one kinda looks like a variant of a Terran destroyer... maybe a neutral?