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Old 04-23-2008, 11:23 PM   #1
 
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Default Dew point vs. humidity

I've seen a couple of posts that refer to this distinction and I kinda thought I understood it but then the next day, I wouldn't be able to recall what I thought I understood. Ever have that happen to you?

Anyway, Msgiblet was the first one I saw make reference to the dew point as opposed to humidity and I've been curious about it ever since. Turns out that dew point is a much better gauge than relative humidity to determine what your hair will be doing.

This site:
http://www.wmur.com/askthemeteorolog...93/detail.html
offers a decent explanation and if you can get through the excessive exclamation points and random typos, you will come away with a good grasp of the difference between these two labels.

This site is probably even better:
http://www.jonathan-owens.com/2008/0...y-round-1.html


And now I am on a search for a Web site that will give provide an "at a glance" dew point reading every day. If anybody finds a good one, please post it here. Thanks!
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Old 04-23-2008, 11:59 PM   #2
 
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I am all about the dew point.

If it is a cool rainy day, it can be 100% humidity and my hair won't be negatively affected. The dew point is lower.

But, if it is hot and humid it is different. Things are hard to control when dew points get in the mid 60s and about impossible for me if the dewpoint is over 70. At that point it is pretty miserable and I prefer to wear updos, so frizz is a little less of a factor.

ETA: I think I saw that first site last summer, which refreshed my basic meteorology training back in Jr High. That's what got me starting to look at dew point and hair.

That is why I don't rely on relative humidity at all. It really tells me nothing hair wise.
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Old 04-24-2008, 12:05 AM   #3
 
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Found the one I used last summer.

It is regional, but should be close enough for those in the US.

dew point map
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Old 04-24-2008, 12:13 AM   #4
 
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Quote:
Originally Posted by redcelticcurls View Post
Found the one I used last summer.

It is regional, but should be close enough for those in the US.

dew point map
Perfect. It is now in my bookmarks. Thanks, redcelticcurls!
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CONDITIONERS and LEAVE-INS: Mop Top Daily Conditioner, KBB Nectar, Aubrey GPB or Island Naturals, Robert Craig, Any Jessicurl
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Old 04-24-2008, 12:25 AM   #5
 
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You're welcome, and thank you for posting your links.

I tried to explain the dew point thing last summer, but I rambled too much. Your links work much better!
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Old 04-24-2008, 01:48 AM   #6
 
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Cool! I get it now! So much more helpful tha rel hum! Thanks for posting
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Old 04-24-2008, 09:06 AM   #7
 
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Thank you! I remember the conversation earlier, but couldn't wrap my brain around it. Now it makes sense!
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Old 04-24-2008, 09:13 AM   #8
 
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Quote:
Originally Posted by jillipoo View Post
I've seen a couple of posts that refer to this distinction and I kinda thought I understood it but then the next day, I wouldn't be able to recall what I thought I understood. Ever have that happen to you?

Anyway, Msgiblet was the first one I saw make reference to the dew point as opposed to humidity and I've been curious about it ever since. Turns out that dew point is a much better gauge than relative humidity to determine what your hair will be doing.

This site:
http://www.wmur.com/askthemeteorolog...93/detail.html
offers a decent explanation and if you can get through the excessive exclamation points and random typos, you will come away with a good grasp of the difference between these two labels.

This site is probably even better:
http://www.jonathan-owens.com/2008/0...y-round-1.html


And now I am on a search for a Web site that will give provide an "at a glance" dew point reading every day. If anybody finds a good one, please post it here. Thanks!
www.weather.com -- type in your zip code and it will list all of that information. Also, you can watch Local on the 8's on the Weather Channel -- of course, I don't know what channel that is for you. But if you catch it at the very beginning, the first screen gives you all the info. I watch this every morning.
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Old 04-24-2008, 09:18 AM   #9
 
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Quote:
Originally Posted by redcelticcurls View Post
I am all about the dew point.

If it is a cool rainy day, it can be 100% humidity and my hair won't be negatively affected. The dew point is lower.

But, if it is hot and humid it is different. Things are hard to control when dew points get in the mid 60s and about impossible for me if the dewpoint is over 70. At that point it is pretty miserable and I prefer to wear updos, so frizz is a little less of a factor.

ETA: I think I saw that first site last summer, which refreshed my basic meteorology training back in Jr High. That's what got me starting to look at dew point and hair.

That is why I don't rely on relative humidity at all. It really tells me nothing hair wise.
ITA!! I have to know what the dew point is!! That's the first thing I look for every morning. Ours is in the 50's today and my hair is SO happy!
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Old 04-24-2008, 10:23 AM   #10
 
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Well this thread is enlightning. Our dew point today is 67. Lovely. No wonder my hair looks like garbage. I was blaming it on Biotera. Poor gel gets all the blame.
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Old 04-24-2008, 10:25 AM   #11
 
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Quote:
Originally Posted by jillipoo View Post
I've seen a couple of posts that refer to this distinction and I kinda thought I understood it but then the next day, I wouldn't be able to recall what I thought I understood. Ever have that happen to you?

Anyway, Msgiblet was the first one I saw make reference to the dew point as opposed to humidity and I've been curious about it ever since. Turns out that dew point is a much better gauge than relative humidity to determine what your hair will be doing.

This site:
http://www.wmur.com/askthemeteorolog...93/detail.html
offers a decent explanation and if you can get through the excessive exclamation points and random typos, you will come away with a good grasp of the difference between these two labels.

This site is probably even better:
http://www.jonathan-owens.com/2008/0...y-round-1.html


And now I am on a search for a Web site that will give provide an "at a glance" dew point reading every day. If anybody finds a good one, please post it here. Thanks!
That 1st link - was my hometowns local news station....you probably don't care but it made me notice it because of the call letters.
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Old 04-24-2008, 10:29 AM   #12
 
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Quote:
Originally Posted by Kitara View Post
Well this thread is enlightning. Our dew point today is 67. Lovely. No wonder my hair looks like garbage. I was blaming it on Biotera. Poor gel gets all the blame.
Yuck, that is sticky.

Curl Keeper might help... it'd be an interesting thread to start, especially with folks in the SE US getting the humids already.
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Old 04-24-2008, 10:34 AM   #13
 
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Quote:
Originally Posted by Kitara View Post
Well this thread is enlightning. Our dew point today is 67. Lovely. No wonder my hair looks like garbage. I was blaming it on Biotera. Poor gel gets all the blame.

Yeah, mine is 66. We must be neighbors because it seems like the rest of the country has it much better than us. I have to say, though, my hair doesn't seem to be responding negatively. Then again, maybe dew point is always high here and my hair could be better if it wasn't. Hmmm.
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Old 04-24-2008, 10:36 AM   #14
 
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Can too low dew point be bad? I was thinking, Lucky Nevada...dew point 4! But maybe too low of one isn't good either ???
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Old 04-24-2008, 10:50 AM   #15
 
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Can too low dew point be bad? I was thinking, Lucky Nevada...dew point 4! But maybe too low of one isn't good either ???
It can be. Low winter dew points is what contributes to some curlies loss of curl in the dry winter months.
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Old 04-24-2008, 10:57 AM   #16
 
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Quote:
Originally Posted by Boomygrrl View Post
Quote:
Originally Posted by Kitara View Post
Well this thread is enlightning. Our dew point today is 67. Lovely. No wonder my hair looks like garbage. I was blaming it on Biotera. Poor gel gets all the blame.

Yeah, mine is 66. We must be neighbors because it seems like the rest of the country has it much better than us. I have to say, though, my hair doesn't seem to be responding negatively. Then again, maybe dew point is always high here and my hair could be better if it wasn't. Hmmm.
No kidding! The only one higher than Arkansas is the very bottom tip of Texas. Sheesh. Is this JULY?!? I really thought it was April, but maybe we time warped or something.
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Old 04-24-2008, 01:42 PM   #17
 
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Well that explains why Seattle is fairly un-horrible considering how high the relative humidity usually is. It all makes sense now!
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Old 04-24-2008, 03:36 PM   #18
 
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Quote:
Originally Posted by Kitara View Post
Quote:
Originally Posted by Boomygrrl View Post
Quote:
Originally Posted by Kitara View Post
Well this thread is enlightning. Our dew point today is 67. Lovely. No wonder my hair looks like garbage. I was blaming it on Biotera. Poor gel gets all the blame.

Yeah, mine is 66. We must be neighbors because it seems like the rest of the country has it much better than us. I have to say, though, my hair doesn't seem to be responding negatively. Then again, maybe dew point is always high here and my hair could be better if it wasn't. Hmmm.
No kidding! The only one higher than Arkansas is the very bottom tip of Texas. Sheesh. Is this JULY?!? I really thought it was April, but maybe we time warped or something.
Oh, ho! I agree with the time warp, but ours is winter! We get two days of about 70 degrees, then the very next day we'll get snow! Hello...this is APRIL! It should be a constant warmth, here! And it's raining today...loverly.
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This area is under construction as my hair type changed and nothing works well for me. I shampoo, I condition and pretty much have done nothing but chuck my hair in a messy bun for the past oh...year? Yeah, I'm that lazy.

No...going no-poo or CG does not work for me. It leaves me overconditioned and oily in a second no matter what I use, so that's not what's not working.
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Old 04-26-2008, 10:55 PM   #19
 
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Wow, I was looking at the dew point map. Some parts of Colorado and New Mexico have dew points below zero.

That is Dune dry for goodness sake.
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Old 04-26-2008, 11:11 PM   #20
 
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Yep. Welcome to our hell. I mean, paradise! It's not as bad here as in CO or NM most of the time, but it is bone dry.
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This area is under construction as my hair type changed and nothing works well for me. I shampoo, I condition and pretty much have done nothing but chuck my hair in a messy bun for the past oh...year? Yeah, I'm that lazy.

No...going no-poo or CG does not work for me. It leaves me overconditioned and oily in a second no matter what I use, so that's not what's not working.
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