June 24, 2009 South Dakota Long Lived Supercell
Last Updated on Wednesday, 27 January 2010 13:41 Written by Roger Hill
June 24th had potential. Good deep layer shear, decent moisture, high instability and a mesolow along an outflow boundary would provide all the ingredients to produce several supercells in South Dakota. We spent part of the afternoon in Murdo and waited for something to happen. Finally by early evening, a tornado warned supercell formed and right turned strongly into far south central South Dakota and eventually into Nebraska. This storm had great structure and tried several times to produce a tornado. It did produce hail to baseball size. Click on an image for a larger photo.
LPish supercell west of Murdo. Pretty structure as the storm gets better organized. |
Storm becomes much wetter. The hail roar was very audible now. |
Bit of a lowering forms as the storm is now tornado warned southwest of Murdo. |
Gorgeous structure with vault, inflow band and updraft in this photo. Doesn't get much prettier than this. |
Inflow band gets thicker, as base comes down even lower. Still tornado warned. |
Closer shot of the updraft base and clear slot. |
Large lowering forms that spun strongly. I thought we might get a tornado here as the storm was just northwest of Winner, SD. |
Strong wet RFD develops this shelf on the southwest side of the storm, now on the Nebraska border and still tornado warned some 4 hours later! |
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