FUNNEL CLOUD is coming down in Swanton, Nebraska, right now! Storm Chaser Jakob McMillin is LIVE on this on YouTube and inside of the FREE WeatherFront app! @WXPeterGriffin @WxFront

South Dakota storm put on an unreal show last night; look at this microburst/downburst in the RFD, or rear flank downdraft, of the tornadic supercell near the town of Ideal! This was the plume of heavy rain and hail that crashed to earth on the back side of the tornado, wrapping the circulation in rain. The RFD is like a cold air wraparound on the back side of a thunderstorm. It can both tighten a burgeoning tornadic circulation or, if it’s too strong, choke it. The strength of the RFD is crucial in tornado formation; it must be perfectly balanced with the storm’s inflow, or supply of warm, humid air being ingested from the southeast. We believe this was a microburst embedded within the RFD (relatively common, and also leading to an RFD surge, since it kicks the RFD forward). Note how the dense, rain-cooled air crashes to the ground and then flattens outward. Tornado formation occurred shortly after this.