When precipitation cores hit the ground, some of it spreads outward along the edges, forming a flared bottom, also known in storm observers’ lingo as a “rain foot.” Rapidly moving ones—especially if they raise scud clouds or dust, or are accompanied by power flashes—signal damaging downbursts. In this case, however, the foot was kicking only slowly, and the outward rush of winds away from the core appeared to be non-severe. Being inside a rain foot, one can experience very heavy precipitation even though little or none is falling from the cloud base directly above.
4 NE Palisade NE (12 Jun 7) Looking SE
40.3758, -101.0228