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150 degree field temperature

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BradStevens
(@bradstevens)
Illustrious Member

They mentioned during the broadcast that the field temp hit over 150 degrees on Saturday. I thought they were exaggerating for effect.

Apparently not.  

https://www.wtnh.com/sports/ap-josh-hoover-throws-4-td-passes-as-no-6-indiana-opens-title-defense-with-a-52-16-rout-of-north-texas/

Some questions:

1.  How hot does that make the air they were playing in?  

2.  Why do we not have grass?  

 


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Topic starter Posted : 09/07/2026 9:12 am
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OpenWheel's avatar
(@openwheel)
Famed Member

That heat absorbing ground rubber most fields use now, is shit. In that respect anyway. I guess good in many other ways.


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Posted : 09/07/2026 9:39 am
OpenWheel's avatar
(@openwheel)
Famed Member

I have an old (built in 1964) wood fired sauna. The standard temp I like is about 160, don't go above 175 anymore. Not at my age. It's awesome at 155-165 tossing water on the stove for steam. But I'm sitting naked - not working at max effort wearing a bunch of gear.

I can't imagine! Lobster cooking temps for those players.


This post was modified 2 months ago 3 times by OpenWheel
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Posted : 09/07/2026 9:42 am
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Tammany's avatar
(@tammany)
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The current field isn’t shit.

With grass later in the season it stops growing and the surface gets hard and less consistent.

It’s a trade off.

It was sunny, humid, and 95*.  Short of building a dome, there is not much that can be done to make such conditions comfortable.


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Posted : 09/07/2026 9:49 am
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BradStevens
(@bradstevens)
Illustrious Member

Posted by: @tammany
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The current field isn’t shit.

With grass later in the season it stops growing and the surface gets hard and less consistent.

It’s a trade off.

It was sunny, humid, and 95*.  Short of building a dome, there is not much that can be done to make such conditions comfortable.

I'm pretty sure all the studies still show grass is safer for players than any form of turf. 

Lambeau does a pretty good job of grass upkeep. Think they have underground heaters to keep the roots warm.  

 


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Topic starter Posted : 09/07/2026 11:26 am
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kkott's avatar
(@kkott)
Noble Member

@bradstevens Those temps are hard for me to believe. My car, sitting on an asphalt parking lot for hours at 100 degrees in the Carolina sun, has never registered more than 110. I would think at 150+ you should consider postponing the game for player safety. My body shuts down in high heat. 150 degrees, would greatly impact my ability to function, let alone work hard. Maybe the max temp readout on my car is 110!


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Posted : 09/07/2026 11:28 am
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UncleMark
(@unclemark)
Illustrious Member

Posted by: @kkott
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@bradstevens Those temps are hard for me to believe. My car, sitting on an asphalt parking lot for hours at 100 degrees in the Carolina sun, has never registered more than 110. I would think at 150+ you should consider postponing the game for player safety. My body shuts down in high heat. 150 degrees, would greatly impact my ability to function, let alone work hard. Maybe the max temp readout on my car is 110!

Yeah, I'm sure someone found a "hot spot" that registered 150 but there's no way the ambient temp on the field was anywhere close to that. Sammy mentioned a lot of ambulance runs for people in the crowd -- and I can understand that -- but if it was truly 150 on the field they players would have been in big trouble. I don't recall seeing a lot of cramping or players otherwise having heat related issues.

 


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Posted : 09/07/2026 12:40 pm
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UncleMark
(@unclemark)
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Posted by: @bradstevens
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I'm pretty sure all the studies still show grass is safer for players than any form of turf. 

Turf has come a long way. I don't think it's anywhere close to as bad as it used to be.

A world renowned ag school like Purdue can't pull off grass worth shit. It may be a funding issue, but that tells you how difficult it is. Then there's the ongoing maintenance...

 


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Posted : 09/07/2026 12:48 pm
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Tammany's avatar
(@tammany)
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I’m pretty sure the turf itself was 150*.  Ambient temp on the field was probably upper 90’s close to 100*, add another 8* or whatever for the heat index.


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Posted : 09/07/2026 1:04 pm
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OneEyedUndertaker
(@oneeyedundertaker)
Noble Member

At 156 deg. Skin will burn at just over a second(with water).  No way the entire playing surface was that hot..


This post was modified 2 months ago by OneEyedUndertaker
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Posted : 09/07/2026 1:50 pm
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Middawg's avatar
(@middawg)
Noble Member

Posted by: @oneeyedundertaker
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At 156 deg. Skin will burn at just over a second(with water).  No way the entire playing surface was that hot..

 

That doesn't make a lick of sense.  

 

I regularly sit in a sauna at 170 degrees for 30 mins.  

 

They weren't playing in a hot tub that was 150 degrees.  

 


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Posted : 09/07/2026 3:25 pm
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OneEyedUndertaker
(@oneeyedundertaker)
Noble Member

Posted by: @middawg
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Posted by: @oneeyedundertaker
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At 156 deg. Skin will burn at just over a second(with water).  No way the entire playing surface was that hot..

 

That doesn't make a lick of sense.  

 

I regularly sit in a sauna at 170 degrees for 30 mins.  

 

They weren't playing in a hot tub that was 150 degrees.  

 

Per AI.  The field isn’t a sauna either, their skin was in direct contact with the turf.  

You don’t get burned in a 170°F (77°C) sauna because air is a terrible conductor of heat and your body is highly efficient at cooling itself. While water at that same temperature would cause severe burns within seconds, several physical and biological mechanisms protect you in a sauna. [1, 2, 3, 4]

🧊 Low Heat Conductivity and Density of Air

The primary reason you don't burn is the difference between air and liquids or solids: [1]
 
  •  
  • Low Density: Air molecules are spread very far apart compared to water molecules. Even though the air is hot, there are relatively few molecules colliding with your skin at any given millisecond to transfer that energy. [1]
  • Poor Thermal Conductivity: Air does not transfer heat quickly. Because it is a poor conductor, your body can handle being surrounded by it for short periods. [1]
  •  

🛡️ The Protective "Boundary Layer"

As you sit still in a sauna, your body cools the air immediately touching your skin. This creates a thin, microscopic blanket of cooler air around you known as a boundary layer.
 
  •  
  • As long as you remain still, this layer acts as an insulator against the 170°F room.
  • If you move quickly, wave your hands, or if someone blows air toward you, you break this boundary layer, which is why the air suddenly feels much hotter. [5]
  •  

💧 Evaporative Cooling (Sweat)

Your body’s built-in cooling system actively fights the ambient temperature. When your brain detects the extreme heat, it triggers intense sweating. As the sweat evaporates off your skin into the dry sauna air, it absorbs heat energy directly from your body, effectively keeping your skin temperature well below the burning threshold. [2, 6]

⚠️ A Note on Humidity

This protection holds true primarily because traditional saunas have very low humidity (usually around 10% to 20%). If you throw a large amount of water on the sauna rocks, you create steam (löyly). Because water vapor transfers heat much faster than dry air, a sudden spike in humidity will make that same 170°F feel intensely hotter and can rapidly cross into dangerous territory if overdone. [3, 5, 7]
If you are planning a sauna session or building one, would you like to know more about the ideal humidity levels or safe time limits for different types of saunas? [6, 7, 8]

 

This post was modified 2 months ago 3 times by OneEyedUndertaker
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Posted : 09/07/2026 3:54 pm
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BradStevens
(@bradstevens)
Illustrious Member

Posted by: @unclemark
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Posted by: @kkott
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@bradstevens Those temps are hard for me to believe. My car, sitting on an asphalt parking lot for hours at 100 degrees in the Carolina sun, has never registered more than 110. I would think at 150+ you should consider postponing the game for player safety. My body shuts down in high heat. 150 degrees, would greatly impact my ability to function, let alone work hard. Maybe the max temp readout on my car is 110!

Yeah, I'm sure someone found a "hot spot" that registered 150 but there's no way the ambient temp on the field was anywhere close to that. Sammy mentioned a lot of ambulance runs for people in the crowd -- and I can understand that -- but if it was truly 150 on the field they players would have been in big trouble. I don't recall seeing a lot of cramping or players otherwise having heat related issues.

 

Air temp =/= surface temp.  

 


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Topic starter Posted : 09/07/2026 6:52 pm
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76-1's avatar
 76-1
(@76-1)
Reputable Member

@bradstevens 

We had grass about 20 years ago and had real problems with it… Mid-field it looked like a poorly maintained high school field…, brown and worn… 

This field is much better than that one…

The key to the temperature issue is for the Big Ten and the NCAA to pass a rule that any game played prior to October 1st can’t kickoff any earlier than 6pm…

That’ll probably never happen because there’s too much money coming from the TV networks to buck their start time decisions… 


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Posted : 09/07/2026 8:18 pm
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76-1's avatar
 76-1
(@76-1)
Reputable Member

@oneeyedundertaker 

I thought it sounded a little high but that was on the Fox Sports weather graphic shown during the game and that number was repeated by Cignetti and others.  

I could easily believe 130+ on field during the game…

Whichever RB played in the 4th quarter had a couple of close ups on TV and he appeared to be hyperventilating (unable to catch his breath)…

It’s a testament to our Strength and Conditioning Staff and the ultra hard work of or players that there weren’t any serious heat related injuries last Saturday.  


This post was modified 2 months ago 2 times by 76-1
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Posted : 09/07/2026 8:25 pm
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