Developmental environment and early evolution of the 8 May 2009 "Super Derecho"

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Slide 12 of 46

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Notes: Although the 60 and 70 F lines do not move much through 00Z, the 50 F line begins to get drawn to the northwest in response to the lowering pressures. Low-lvl flow is weak and diffluent in region of MCS genesis (w cntrl KS). High-based convection has produced an area of surface outflow (dotted curve) and small area of high pressure in northeast CO.