Why the dew point matters much more than humidity
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- Опубликовано: 10 июн 2024
- On hot and humid days it feels hotter because of the amount of water in the air. So why don't we use humidity to measure how much water there is to get a heat index?
I'm more confused than when I started.
Same lol
me too
welcome to my life after taking intro to meteorology
The dewpoint indicates "absolute humidity" vs. "relative humidity". The hotter the air the more water it can suspend in vapor. If the air temperature increases but the humidity remains the same the relative humidity decreases, but it's still hot and humid. The dew point really determines how miserable you feel. The only people who should care about relative humidity are museum curators storing priceless artwork or antique furniture. Relative humidity dictates the vapor pressure of water trying to escape these delicate objects.
The highest dew point ever recorded, 95°F (35°C), was recorded at Dhahran, Saudi Arabia, on July 8, 2003. With an air temperature of 108°F (42°C) the heat index was 178°F (81°C).
Really? Are you from Saudi?
@@aintyours7470 yes 👍🏼
I bet that was rough 🥵
Like walking under very warm water
The dew point right now in Queensland is 26°C with humidity 97%
That is clear as mud. I don't think the " professionals" understand it.
at no point does he actually tell us what humidity or dew point are...
2:38
"A Dew point measures how much total water there is"
😓
@@jaredpatterson1701 So there's 78 degrees of water in the air? If it's a measure of how much water, then why are the units temperature? This video is useless.
this was great! I live in a dry area and always wondered why if we had 100% humidity it didnt FEEL humid. Probably cuz our dewpoint was low! I love learning noew things :D
Hello, based on what you said, does that mean your area is cold? Because if the dewpoint is low you have to have a colder temperature for the air to saturate and have 100% humidity. So I'm just guessing you live in a cold area.
GREAT lesson, Sir! I finally get it!
Thank you for the explanation, I understand it a lot better now. The dew point is 77 here right now and I'm even sweltering in the house.
“Man it’s so dew point out here” just doesn’t seem to roll off the tongue.
Great example with the cup of water graphic definitely wish more meteorologist would cover this topic because so many people don’t understand the difference between humidity and dew point.
Dewpoint's one of the most important weather factors IMO. It affects a wide variety of conditions, such as whether or not there will be fog, the heat index, and even how low the temperature will drop. It's impossible to have a dewpoint higher than the actual temperature since it would result in a relative humidity greater than 100%, which is also impossible. So, the temperature can't drop below the dewpoint, unless the dewpoint itself drops. I always think of it as a more absolute measure of humidity than the relative humidity percentage we're often given - the water container example here sums it up well. There are some meteorologists who don't even cover it, and that's just wrong.
The water cup does help, I think I just don’t understand if their are different size of systems in the air just like their are different sized cups?
Hi. Just for clarification. The 8oz and 4oz of water here represent the dewpoint (actual amount of moisture in the air) right? And the 50% and 100% level is represent the RH % right?
And the container represent the Air in the atmosphere?
@@arnelada6216 Yes. It works much like this.
@boomerbear7596 thanks bro. appreciate it.
Nice try. I’m just incapable of understanding.
I like this example… A temperature of 30 and a dew point of 30 will give you a relative humidity of 100%. A temperature of 80 and a dew point of 60 produces a relative humidity of 50%. But it will feel much more "humid" on the 80 degree day with 50% relative humidity than on the 30 degree day with a 100% relative humidity. This is because of the higher dew point. The higher the dewpoint, the hotter it feels.
wow, I can't believe I never understood this. It took me a while of watching this video a couple of times but I think I get it now. Humidity just tells you how the much of the air is saturated with water vapor but NOT HOW MUCH.
Great explanation. Thx so much.
Never needed to know this but extended family has left California and I’m trying to understand why they’re so miserable.
The Higher the dew point, the hotter it feels
Not really, the closer the dew point is to the actual temperature, the hotter it feels.
@@tanishqvedak1862 Not really. 95°F with 80°F dew point feels warmer than 79°F with 75°F dew point. The latter has lower heat index.
So, why do not we use the absolute humidity (amount of water vapor in air) directly instead of dew point temperature (which is an indirect measure of water vapor)?
Because the amount of water that air can hold changes with it’s temperature.
Hotter air can absorb more water and cooler air can’t. That’s why if I say that “there is x grams of water per cubic meter of air” it will give you no usable information because it could be very humid for 25°C and very dry for 40°C.
It’s similar with just stating the dew point. At 25°C and 90% humidity the dew point is 23-24°C. 23-24°C is also the dew point when the humidity is 60% but the temperature is 31°C.
Even though it is hotter, you will be less sweaty at 31°C 60% humidity than at 25°C 90% humidity.
The general rule is that the closer the dew point is to the air temperature, the more water there is in the air and the stickier you will feel. When the dew point is equal to the air temperature, you will start seeing mist and rain.
I think this is his way of obfuscating that he doesn’t actually understand what dew point is
As a southerner living in coastal California now, thank you. I could never understand how it would be 85 with 90% humidity but it doesn’t compare to the south at all. Well our dew point is usually around 63-65 here vs 73-75 in the south
Great information!!👌🏻 Thank you
the second one is hotter only because the moisture is higher,
and that the relative humidity did not increase that much beacuse of a much higher temperature,
while one might feel more hot, but that doesnt necessarily mean feeling more humid than the one with higher humidity
Thank you!!!
Thanks!
I wish everyone knew this. I'm the only one who mentions dew point and nobody knows what I'm talking about. They all use humidity % and it's useless
I appreciate the few point, but there's more to feeling comfortable than few point. We need a "comfort level" based on dew point, wind speed, cloud cover, and uv intensity to have an idea about comfort levels.
Omg I'm 36. I feel really dumb. I've live in Florida for 22 years of my life how did I not know this! Lol
This wasn’t really helpful to me in that it didn’t define terms - such as “heat index” and “dew point”.
I get the cup analogy.
However can the size of the system be different like how their is different sized cups he’s showing? I think I’m missing a step
It’s the temperature!
Gravity affect pressure that is why high gravity cost more fuel to fly but it is easier to fly but lowered gravity easier to lightening the weight but less air to lift off so it is even harder to fly
His explanation makes humidity seem more important or at least more understandable.
It helps me to think of dew point as a metric of human comfort. Anything over 70 is going to be absolutely miserable.
What I dont get is why use 3 different measurement? Just put out heat index and be done with it
still sadly confused with way more effort than I thought I would need to put into this as a college grad:) maybe if I sleep on it
Together we are the Dew Point.
Can’t they do it adult numbers instead of American ones . It doesn’t get to 96 degrees
Our Google Nest smart home hubs display the temperature and humidity. Now I’m thinking that information is useless. Instead, it should just show the heat index number. Right?
In the case of your nest, the humidity is important. That is telling you how much moisture is in the air within your home. If it's lower that normal then you may need to run a humidifier and put moisture into the air. Extremely low humidity in the home (especially during the winter months) can lead to extremely dry throats and nasal passages and also very dry skin.
@@justthebacon I’m afraid you’re confusing the Nest THERMOSTAT with the Nest smart display (a.k.a. Hub). The latter provides weather information.
@@tycox8704 That could be Ty. I'm not sure about the Nest systems, but I would find out if that is giving you the humidity for in the house versus outdoors. If it's outdoors, then you're probably right that it's less important than the dew point.
This would have been way clearer if the left the temperature unchanged to instead of interpreting two variables at the same time.
First time i hear about dew point.I always see humidity in the news.
Clear as mud
That’s was more confusing than anything
Great information ✌️
Can dewpoint vary behind thclosed doors of my cabin?
Here is why i ask.
Sometimes its 5 degrees hotter outside but when i step out it feels cooler. So i open thdoorz &windows b4 outdoor temps dip below interior temps.
I actually built thworlds most advanced (by far) air conditioner climate control heater-AC.
I have 2tons of shelves lining all thwalls serving also as structural member. Strengfhening home.
This massive wood radiator absorbs temps, stores, &memorizes them. I also dont need a shed or dressers or cabinets.
In summer a window fan pulls cool air in. Thradiator stores/slow releases temperatures like the oceans release cool air summer, hotter then air temps winter. In Los Angeles the seashore felt like u were standing over a giant coffee cup. Same principle.
I also use a 100lb Camp Chsf wood stove CENTER cabin. NEVER place wood stoves butted against wall like th idiots do. Never EVER EVER route a chimney up &punch an idiot hole in attic. Good luck cleaning that 3 times in winter. And YES. Smoke travels both horizontally AND even downhill.
I use 15' stainless diesel exhaust pipe 6" horizontal out window aimed downhill couple inches 2drain water. Also, u must NEVER smolder logs all night like idiots do. I use flash fires 2raise temps of my walls drammatically fast. Then, the heat releases slowly all night.
In summer it stays so cold in spring i have 2go lay in thsun. Note i live in southeast Oklahoma. I use crumbs of wood compared2 the idiots that chop trunks in2 branches with a wood splitter destroying our forests
95% people earth arent humans. They are demons. Satans tare race. Controlled by his BEAST computer. Satan HATES free climate controll. So his tares create false reality with climate controls saturated with innefficient demons. U must use his money ONLY 2heat cool u home.
tldr
Elle
🤔 huh?
So, water= atmospheric moisture levels, helps to cool the palpable air.
Genesis 1: 6 And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters.
7 And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so.
Good explanation
more confuse
What you just said, is one of the most insanely confusing things I’ve ever heard! At no point in all your rambling, were you even close to clearly communicating and educating anyone on heat, humidity, and dewpoint! Everyone who watched this is now more confused than ever for having listened to you! I award you no points!… and may god have mercy on your soul!
Still didn’t explain shit
yeah, this didn't help.
but, thanks.
This video is gaslighting me into believing I know what dew point is now. I’ll keep searching for another explainer…
Really? Easy higher dewpoint hotter it feeling.
Crap
This is not a useful video to explain dewpoint.
Horribly explained