Good-bye 80’s (for now)

As the saying goes, all good things must come to an end.  Same with our stretch of warm and sunny weather.  For the last week, we’ve had highs of at least 75, with the last 5 days bringing highs in the low 80’s (and no mugginess!  That’s key in my book).  That all changes tonight.

A strong cold front worked through the area, and dropped temperatures in an impressive fashion.  Ahead of the front, we had temperatures in the 80’s with a nice light breeze. (Images at 3 p.m.).

Stateline temperatures at 3 pm Stateline winds at 3 pm

The front then works through Lake Geneva and southern Wisconsin.  Notice the drop off in temperature (23 degrees within 3 hours for Lake Geneva!) and the change in wind direction (key for a front- the wind changing direction to as ushers in a different air mass). (Images at 6 p.m.)

Stateline temperatures at 6 pm Stateline winds at 6 pm

Finally, the front hits the Stateline.  Temperatures plummet into the 60’s with the wind picking up and changing direction. (Images at 8 p.m.)

temp 3 wind 3

Here is the temperature trend in profile.  You can see the definite 16 degree drop off after the front worked through (and it’s neat how the 12 trend is almost symmetrical for the day).

Temperature trend at the Rockford airport, from 9 a.m. to 8 p.m.

Monday’s temperature trend at the Rockford airport

Better yet, check out how the front brought different results for Chicago and Milwaukee (O’Hare measured a 20 degree drop in ONE HOUR!  Wow!).  Talk about abrupt changes!

Temperature trend at Chicago's O'Hare International Airport

Temperature trend at Chicago’s O’Hare International Airport

Temperature trend at Milwaukee's General Mitchell International Airport

Temperature trend at Milwaukee’s General Mitchell International Airport

So how will this new week play out?  Today’s front has some lasting effects, as we’ll only see the low 70’s for highs at the warmest this week.  This week will be a roller coaster, with warm-ups for Wednesday and Thursday, then more drops late in the week to the 60’s and 50’s.  Much needed rain is coming, too, on Thursday.  Hold on!

-Alex Kirchner


Posted under weather

This post was written by Alex Kirchner on September 29, 2014

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