Big spread in morning/afternoon temperature

Light jackets in the morning and beads of sweat in the afternoon. Welcome to Spring in the Upper Midwest! There are four reasons why we’ll see unusually big swings in temperature over the next few days.

#1 is the lack of moisture in the air. (Think desert.) The more water molecules in the air, the more energy is needed to warm and cool the air. So, when there’s dry air present, there are usually bigger changes in temperature from night to day.

#2 is the fact we don’t have mature crops in the fields yet. Did you know that mature corn and soybean plants give off lots of moisture? It’s true! However, that’s only the case in June and July. Right now, those plants are less than a foot tall…not big enough to give us any added humidity.

#3 is the lack of cloud cover at night. If you’ve watched me for any length of time, you’ve heard me say that “clouds act like a blanket on the bed.” The next few nights will be clear so more of that summertime heat escapes into space.

#4 has to do with the sun. We’re entering the time of year with the strongest and most direct rays of sunshine. With sunny days coming in the next few days and with more hours of daylight, look for warmer afternoon temperatures.



Posted under weather geek

This post was written by qni_it on May 28, 2014

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