- This bright clear slot indicates a rear flank downdraft (RFD)
- W001671Z
- The view here is to the northwest just after a severe storm passes to the right. The bright clear slot indicates a pronounced, intense rear flank downdraft (RFD) about to arrive as damaging straight-line winds along the ground. The drying downdraft is often mild or even warm, unlike outflow, because the air heats up adiabatically on descent.
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