The featured chart presents a climatology of 500 hPa (millibar) temperatures from the morning sounding for Omaha along with this year's observations. This pressure level in the atmosphere is some over 3 miles above the ground surface and is one of the important levels meteorologists look at to forecast the weather. The chart clearly shows the significant dip around mid May that accompanied the very cold temperatures. Recently temperatures have been on the decrease, which helps promote thunderstorm activity as colder temperatures aloft create unstable situations.

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Tags:   sounding