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Severe WX Severe Weather 4/11 - 4/15

The shear in the lowest levels has marginally increased ~5kts in each of the past two hours, per mesoanalysis. The northeastern IA supercells are now in a pocket of 20kts of 0-1km shear (compared to 10kt and 15kt the previous two hours), so this is their best chance so far for tornadoes wrt low level shear.

The next fly in the ointment is that there is a lot of convection to the south of the tornado warned supercell(s), growing upscale towards it.
 
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