Extreme snowfall rates lead to thundersnow north of Clear Lake, Iowa on 2/23/2017. A blizzard warning was issued for high winds and heavy snowfall.
Shot 1-6: Lightning appearing during heavy snowfall on I-35.
Shot 7: Thunder heard after lightning.
Shot 8-9: Very high winds and snowfall under street lights off of I-35
Shot 10: Iowa DOT Plows side road and onto I-35
Shot 11-12: Heavy snowfall and high winds near I-35