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Post 4th Of July: Cooldown This Week & Chantal

8 Jul 2013, 11:31 am

Hope you had a great holiday weekend!  I had some fun: did an 83 mile bike ride on the 4th, followed by fireworks, and had a big day at the lake in western Wisconsin on Saturday.

 

Waterskiing in Wisconsin
Waterskiing in Wisconsin

 

How did YOU celebrate the 4th of July?  It’s amazing how many things “American” we do surrounding the 4th.  We celebrated the end of our bike ride by eating seasoned waffle fries and amazing root-beer floats!

Speaking of floats – we watched a boat parade on Saturday.  This was one float, likely the winner:

 

Noah & His Ark: Boat Parade In Wisconsin
Noah & His Ark: Boat Parade In Wisconsin

 

Tons of fun.  Now, back to the weather…

 

Lots of heat this past weekend.  Places like Minneapolis got into the 90s on Sunday, and to be honest – I had taken a vacation from forecasting for the long weekend, so the heat surprised me…

There is some relief in sight, however.  A cold front will slide in by midweek and change the pattern for the weekend.

Take a look at this:

 

Jetstream Friday
Jetstream Friday

 

See the shaded regions?  Those are jet streaks.  See how it dips south into Kentucky and even toward Alabama?  Then loops north again along the eastern seaboard?  That is the cooling dip in the jetstream… and that will usher in some temperature relief.

Here is a look at Friday’s temperature forecasts:

 

Model Forecast Highs: Friday
Model Forecast Highs: Friday

 

Cooling for the East!

Now, here is the bit about Chantal.  Hurricanes (or tropical storms/depressions, in this case) , while strong on their own, are VERY finicky about the weather surrounding them.  They can easily be pushed off their course by high pressure, other low pressure systems (unless the Fujiwara effect comes into play… google that if you’re interested in more information), or even… cold fronts.

With this particular system we’re watching our same cold front discussed above as it looks to sweep south & eastward, thus shifting Chantal’s approach.  That is why it has so much of a northern turn.

Take a look at this (keep in mind, this is the 11am EDT updated path from the National Hurricane Center, so track modifications will likely be made):

 

11am EDT Chantal Update
11am EDT Chantal Update

 

It will certainly be interesting to watch!

Have a great start to your week.

 

WeatherNation Meteorologist Aaron Shaffer @ashafferWNTV

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