The 80’s Return!

May 6, 2015: We’ve waited long enough! The 80’s returned today!

Temperature map from 3 PM today

Temperature map from 3 PM today

Why is this such a big deal?  We haven’t warmed beyond the 80° plateau since late September. We’ve been close a few times, but today marks the first time in 7 months since we’ve last hit 80°.

80

Thankfully, we shouldn’t have to wait nearly a half of a year before weather this warm returns.

Not everyone saw the 80’s today, though.  Check out the areas along Lake Michigan, especially into Chicago. A breeze off of the lake kept location in the 50’s. According to the National Weather Service, in some spots of Chicago, the temperature dropped 30° within a ten mile stretch. Yikes!

You can see that breeze, in fact, on the radar on a quiet day.

radar

The lake breeze is caused by the air heating up well inland and rising, causing the air pressure to be lower in those spots.  The colder, denser air over the lake acts as an area of high pressure, so a breeze forms to fill in the lower air pressure over the inland areas. The flow from lake to shore acts as natural air conditioning, keeping the shore cool.  This breeze reverses at night.

We should have all areas in the 80’s tomorrow, as a strong southerly wind kicks in, moving even warmer air into the region. Highs should jump back to the middle 80’s in the Stateline!  Enjoy it!

– Alex

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Posted under weather

This post was written by Alex Kirchner on May 6, 2015

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