From the ABC 7 Weather team

Wait, What Season Is It?!

October 4, 2012 - 03:00 PM
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It's 60 degrees one day and then 80s the next.  When will the weather make up its mind?

October arrives, we get a taste of cool, autumn-like weather one day and then the next, it's back to the 80s and humid.  What's up with that?  Well, it's fall and it's actually quite common. 

I was thinking about this earlier today, as I was heading into work.  I have very much enjoyed the few days over the last month and a half when it's cool, refreshing, with low humidity!  Let's just say, I have a lot better hair days when it's not as 'sticky'.  Take a look at the highs on Wednesday.

High Temperatures Wednesday, October 4th

So where is the autumn-like weather?  Well, it's coming.

Transitional seasons, such as spring and fall, experience frequent temperature flucuations.  Keep in mind, we're now past the autumnal equinox, so the Northern Hemisphere is tilted farther away from the sun.  Basically, that equates to more rapid cooling in the Northern latitudes (tilting farther away from the sun, with minimal daylight), which contrasts much more to temperatures near the Equator.  The stronger temperature gradient creates more drastic dips in the jetstream, which brings the cooler air farther South to the U.S.  Think of it as a tug of war between the cold air near the North Pole and the hot air near the Equator... who will win??  

Model Simulation for Friday Evening (10/5)

Take a look at how this will impact temperatures!  While it's still in the 80s across the Mid-Atlantic and Southeast, the Great lakes and Upper Midwest will be in the 40s and 50s!

Forecast Highs Friday, Oct. 5th

Well, it looks like the cold air will take over come this weekend.  Before then, we're back into the 80s today and Friday.  Trust me, you'll feel the difference come Sunday when highs barely reach 60° and overnight lows tumble into the 40s.  At least the changing weather gives us all something to talk about! 

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