Old (Weather With Enthusiasm)

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Good morning everyone. It is August and then it's in the late morning and today is finally here an exciting day because it is extremely humid outside and the dew points are really really high. This is a rarity here in the Chicago area. Right now the state of Illinois is the most human state in the country and we're seeing dew point, the maximum dew point in the past 12 hours was a sauna like 84 degrees. It's reporting on one website. Dark Sky says that parts of the Chicago area currently have a dew point of 81 degrees. The National Weather Service weather app says the dew point 78 degrees. Other sources say that the dew point the official dew point in Chicago 76 degrees. Midway according to one side says the dew point 74 degrees. So we certainly been a hard time trying to figure out what the dew point is here in the Chicago area. But either way, probably the strongest indicator that we actually do have dew points currently in the Upper 70s and even low 80s low 80s. Imagine that low at dew point is from the National Weather Service Forecast discussion, where it says the dew points today will remain in the Upper 70s and low 80s remain meaning they have gone up into the upper 70s and low 80s accuweather.com is reporting maximum dew points to be occurring late this afternoon at 79 degrees, and they have their models a little bit off for right now though what do they say the dew point at noon will be 71 degrees, but it's already in the Upper 70s. But either way, perhaps there are places in Chicago where the dew point is only in the low 70s. And perhaps each weather station is reporting a different viewpoints. But by late afternoon dew points will be in the upper 70s. And the National Weather Service has pointed out that there will even be some locations with dew points in the low 80s. This is as high as it can possibly get. The record for Chicago has a dew point of 83 degrees. That's the highest dew point ever recorded in Chicago. So we are approaching record territory here. And what's amazing about this is that it's not just we're approaching record territory, but it also the highest dewpoints in the country are occurring right over the Chicago area. Now South Bend Indiana also is having very high dew points a little bit less than the Chicago area. dew points between 75 and 76 degrees. dew points will likely go a little bit higher as the day progresses. He didn't afternoon he didn't disease top out between 95 and 105. For South Bend, Indiana. He didn't he's expected to be around 110 area wide in the Chicago area. Heat advisories in effect for Chicago possibly for South Bend as well until 7pm this evening. Now the one variable that is might mess up this heat is if thunderstorms develop this afternoon. As of now the thunderstorms are expected to hold off until this evening. Some of those storms could be severe, especially with damaging wind 55 to 65 mile per hour wind gusts with an AccuWeather max of 80 miles per hour. There also could be an isolated tornado and large hail. But the main thing will be the damaging winds with these storms. And it's unbelievable the amount of humidity obviously the amount of humidity these storms are dealing with is the highest in the world. This is as intense as it gets really probably on par with the monsoon in India. Just about you know for a week the dew points for between 80 and 81 degrees in New Delhi, India. We're seeing two points here that are places currently dew points are in the low 80s. And parts of Illinois as we speak. And the maximum dew point I don't know if this is official or unofficial was 84 degrees within the past 12 hours here in Illinois. dew points elsewhere in the country it is very difficult to find an 80 degree dew point unless you go down into Galveston, Texas or Corpus Christi, Texas, otherwise plenty of Upper 70s. Lots of Upper 70s. For dew points. There's an 80 degree dew point here and there in the Iowa area.

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dew points of 80 degrees...

There were 3 extreme high humidity impact days in the Midwest during the Summer of 2021. Dew points went into the 80s on each of these days. In this podcast a recap of some of the Midwest dew points on July 29th 2021 are given. Thus was the 2nd extreme 80°+ Dew Point day in Midwest during the 2021 Summer. This podcast includes the effect that cornfields, oceans, lakes, flooded soil has on dew points, along with dew points impact on humidity. In addition it includes some of the impacts that relative humidity has especially when combined with heat. There is a segment in this podcast that defines dew point and another segment which helps people develop an appreciation for the dew point.

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This Podcast can be split into 3 parts. Each part is approximately 10 minutes (give or take a minute or two). The information presented in the final part might be needed to fully understand the 1st part and 2nd part for some individuals. The information presented in the 2nd part helps develop a greater appreciation for the information being presented in the 1st part. One can therefore argue that this podcast is out of order. Perhaps it is for non-weather enthusiasts but for weather enthusiasts all of the excitement is in the 1st part. A weather enthusiast can turn this podcast off after 12 minutes. However some might find the 2nd part a little entertaining.

This podcast talks about some of the significance of dew points. Dew point is defined in this podcast. This podcast also discusses the most spectacular (my opinion) weather variable (and its even man made) in regards to humidity. We talk about the Midwest corn fields. The transcript is as follows:
Unknown 0:08
Good morning, everyone. It is Monday August 2. I wish this could be part of the humidity podcast. But that one is just too long already. I wanted to just discuss, why is it so rare to have at Dewey dewpoints in this country? Why? Why do we not experience the yet the other countries on by the Red Sea in the Persian Gulf, they do experience 80 degree dew points well into the 80s. And we don't what's wrong over here? We have the Gulf of Mexico. So what exactly is wrong, the Gulf of Mexico is really, really warm waters. So first, I, maybe I should explain what dew point is, like I did in the previous podcasts, a couple other podcasts. vouchsafed very quickly, the dew point is the most accurate way to measure humidity in the air, it's the temperature at which the environment would become saturated. So again, we have a large jar holds more water than a small jar, heat expands. So the warmer it is, the larger the air molecules are, the more water vapor it could hold. Relative humidity is how much water vapor is the air holding compared to what it could hold. So what you end up with is 90 degrees with a relative humidity of 50%. Relative humidity of 50% mix is a usually the dew points about 20 degrees lower than the temperature. It's that's not 100%. exactly correct. It depends on what the temperature is. But if you have an air temperature of 90 degrees, relative humidity, 50%, that's holding as much water vapor at 70 degrees could hold. So the relative humidity of 100%. When the temperature 70 would produce a relative humidity of 50% when the temperature is 90. And a lot of times by the way, and 90 degree heat in the afternoon, drops to 70 at night. So it's not uncommon to see the relative humidity close to 100% in the morning, and then drop the 50% in the afternoon. It's not that the humidity is dropping the humidity staying the same. The only differences is the relative humidity relative humidity is important. More so I think it's more important for weather forecasters. And dealing with the environment how much the what are the chances that the precipitation will be evaporating before it touches the ground. And it's more important for forecasters, it doesn't play To my knowledge, it does not play a significant role. And for our purposes, in terms of how the air feels, the only time it would play a significant role is when we're dealing with borderline humidity. So dew points of 60 or higher are considered humid, dew points of 70, or higher or 72 or higher, are considered oppressive, sometimes maybe even Upper 60s. So when dew points are in the 70s, it's going to feel humid, no matter what, when dew points are in the 60s, it's gonna feel humid. But when temperatures get really hot, it's not gonna feel humid, it's gonna feel more dry, there still will be a heat index of a degree or two, but it's gonna feel a little bit more dry, the relative humidity is so low in the morning, it's gonna feel humid. And when dew points are in the 60s, I think you do need a higher relative humidity in order for it to feel for it to have that moist feeling. And I think if if it's in the Upper 50s with the relative humidity of 100%, I think it's also going to have that moist feeling as well. So I think that's where the relative humidity plays a role and comfort level in when dew points are in the 60s, and also in the winter in terms of that damp feeling. But again, we go back to our question is why are dew points higher than 80 so rare here in this country. Now one thing you have to realize is that the temperature always has to be higher than the dew point. So the only time dew points of 80 degrees could occur is if the basically the...