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Tsronco · 02-09-2012, 07:39 PM

Does water freeze if windchill is below 32 degrees but the actual temp is above 32 degrees?

ottffss · 02-09-2012, 07:41 PM

Nope.
Wind chill is what we humans PERCEIVE the temp to be given wind.

BudtheDiplomat · 02-09-2012, 07:43 PM

If the temperature is above freezing, windchill will not freeze an object. Windchill affects the SPEED with which something loses temperature (like blowing on hot coffee).

Tallyrver · 02-09-2012, 07:50 PM

Wind chill was the "big" thing on all the weather forecasts this past year. It made it sound worse than it was.

Mr_D · 02-09-2012, 07:53 PM

Quote:

Originally Posted by ottffss

Nope.
Wind chill is what we humans PERCEIVE the temp to be given wind.

Yep, takes a wet bulb thermometer to measure temps that involve warm blooded animals.

ottffss · 02-09-2012, 07:58 PM

Quote:

Originally Posted by Mr_D

Yep, takes a wet bulb thermometer to measure temps that involve warm blooded animals.

Actually a wet bulb thermometer is used to measure relative humidity by comparing wet bulb to dry bulb temperatures. The wet bulb will be lower temp due to evaporation which cools the wet bulb. The lower the humidity the more it cools the wet bulb. Naturally, at 100% humidity the wet=dry bulb temp.

Wind chill is a simple formula (or chart) using only wind speed and ambient temp (dry bulb). NWS Wind Chill Index

Tsronco · 02-09-2012, 08:54 PM

Thanks all

nosticks · 02-10-2012, 07:33 AM

We need more simple answers like those posted above.

I cringe at a question like the OP asked. It's usually followed by at least one response from some retired and bored engineer presenting his doctoral thesis on thermodynamics, then eventually argued by some retired professor until the thread no longer resembles the original question.

1ciderdog · 02-10-2012, 10:27 AM

Just a thought. Could that depend on where the water is located - if the water in in a puddle on the ground and ground temp is under 32 - wouldn't it freeze? I know it doesn't melt rapidly when temp is above 32. Also 32 is at sea level and I don't know how elevation affects the freeze point but elevation sure affects the boiling point.
Safe Travels
Bob

historyljc · 02-10-2012, 10:33 AM

Quote:

Originally Posted by 1ciderdog

Just a thought. Could that depend on where the water is located - if the water in in a puddle on the ground and ground temp is under 32 - wouldn't it freeze? I know it doesn't melt rapidly when temp is above 32. Also 32 is at sea level and I don't know how elevation affects the freeze point but elevation sure affects the boiling point.
Safe Travels
Bob

Now we're ready for that retired and bored engineer.

JimColeman · 02-10-2012, 10:38 AM

This tired , but not bored engineer uses the theory that if the temperature is going to go below 32 degrees, it is best to disconnect and drain the water hose than to have to buy a new hose.
Actually, I use split foam pool noodles to protect my hose, but still disconnect and drain it when the temperature will get below about 25.