UPDATE 2/8/2013 — Within 72 hours of this pulse.. we saw a major snow / ice storm blow into New England.
1/28/2013 news confirmation:
RADAR pulse out of Philadelphia Pennsylvania — still visible on these live feeds here (550pm central time 1/25/2013)
Viewable on backdated NEXRAD RADAR feeds here:
click here to view the GIF animation of the feed: