Roger's SkyPix

Gallery of Outflow

Oklahoma City Arcus

Oklahoma City Arcus

A large, thick arcus thrusts eastward from the forward-flank gust front of an HP (high-precip) supercell. Note greenish tint in the notch between the top of the arcus and the cloud base above it. The funnel-like horizontal cloud filament on the leading edge of the arcus was rotating. The parent thunderstorm, an outflow-dominant supercell, pounded a NSSL chase vehicle with baseball size hail at Yukon OK.

Oklahoma City OK (21 May 87) Looking NW