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June 2016 General Discussion


Hoosier

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That is a really cool map. Never seen one like that before. Have seen similar maps with GIS 3D modeling software. Those moraines really stand out of the landscape. Was wondering if there was other states as well?

 

A dry heat today, what a treat. 85/57 currently.

 

I read somewhere a few years ago (wish I could remember where) that the Mississippi River used to flow towards LaSalle IL, and met up with the Illinois River there.  If you look at that map you can almost envision that.  Would explain why this area is so low.

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I read somewhere a few years ago (wish I could remember where) that the Mississippi River used to flow towards LaSalle IL, and met up with the Illinois River there.  If you look at that map you can almost envision that.  Would explain why this area is so low.

 

Yes it did, when a lobe of the Kansas or Nebraskan ice age glacier blocked off the flow to the west.

 

Scroll to bottom to see maps.

https://www.isgs.illinois.edu/outreach/geology-resources/quaternary-glaciations-illinois

http://media-2.web.britannica.com/eb-media/18/64918-004-69BCB037.jpg

 

Very cool map link.

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Yes it did, when a lobe of the Kansas or Nebraskan ice age glacier blocked off the flow to the west.

 

Scroll to bottom to see maps.

https://www.isgs.illinois.edu/outreach/geology-resources/quaternary-glaciations-illinois

http://media-2.web.britannica.com/eb-media/18/64918-004-69BCB037.jpg

 

Very cool map link.

 

Nice!  Thanks for the links.  Very interesting.  Looks like we used to be at the bottom of the mighty Miss lol.

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Scroll down a little bit..  http://www.outlookmaps.com/shop/state-maps

This is a cool link, thanks!

Kind of explains why this area here was called in rough translation "Area of Bad Wind" by local Indian tribes, or so the story goes. Seeing how southwest flow is what we have Spring through Fall most of the time, being on a plateau between the White and Tippecanoe river valleys does nothing but help funnel the wind right over us. Kind of explains why still days are so rare here.

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Iowa's topo map is also very interesting.  Muscatine's AWOS (KMUT) site resides in relatively low valley compared to surrounding areas.  The elevation at that site is only around 550ft ASL.  This would explain why they get so much hotter on well mixed days than many of the other surrounding sites.  Not only is there an increase in mixing depth compared to surrounding sights, but actual air pressure (not adjusted to sea level) is higher than surrounding sights.  Just 200ft elevation difference is almost 10mb more or less pressure.  Higher air pressure = warmer temp.  Muscatine reported a high of 93 today, which was 2-3 degrees higher than many of the surrounding sights.  

 

 fjj3tz.jpg

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Iowa's topo map is also very interesting.  Muscatine's AWOS (KMUT) site resides in relatively low valley compared to surrounding areas.  The elevation at that site is only around 550ft ASL.  This would explain why they get so much hotter on well mixed days than many of the other surrounding sites.  Not only is there an increase in mixing depth compared to surrounding sights, but actual air pressure (not adjusted to sea level) is higher than surrounding sights.  Just 200ft elevation difference is almost 10mb more or less pressure.  Higher air pressure = warmer temp.  Muscatine reported a high of 93 today, which was 2-3 degrees higher than many of the surrounding sights. 

 

It's always been a torchy spot in the DVN CWA. On a well mixed day that elevation difference between MUT and DVN (just shy of 100 m) could be nearly a full degree right there. A place like CID, closer to 2 degrees. Not to mention any westerly wind is downsloping into MUT. 

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Got a few sprinkles here and some gusty winds, but that was it. Sun is back out now.

 

Was looking at the terrain of western WI. You can see how those cold readings around Sparta and in the lower Wisconsin River Valley happen with cold air draining off the surrounding hills.

 

post-7389-0-74155300-1466439534_thumb.pn

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Fitting that the summer solstice comes with a high of 93ºF at Detroit today, tied for hottest so far in 2016.

That's the third 90 degree day of the season, which to put in perspective, is one shy of the total we achieved during the entire summer of 2009, a truly dreadful memory.

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