Met up with Blair in LWC to observe a line of elevated convection just west of Topeka. Exiting off I-70 at MM338 in between Paxico and Maple Hill, we observed semi-frequent lightning and surprising mammatus on the west side of the developing line. We then relocated ahead of the line on the west side of Lawrence, noticing an impressive ‘whales-mouth’ shelf cloud structure developing as we drove beneath. We were able to capture several lightning/structre stills before the line overtook our location.