Even with plenty of sunshine on Wednesday, temperatures struggled well below freezing. There is currently plenty of cold air at the surface and above our heads as shown by the featured chart of 850 hPa temperatures for the Omaha sounding site. We've had two periods of near record warmth at this level followed by our current period at near record cold. This level is just a few thousand feet above our heads and represents air that is potentially mixed down during the say as the sun mixes the lower atmosphere.

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Tags:   sounding