[News UP] 10 degrees or more in a day... "It's snowing again tonight."

■ Host: Cho Jin-hyuk Anchor
■ Starring: Anti-Sung YTN Disaster Advisory Committee

* The text below may differ from the actual broadcast content, so please check the broadcast for more accurate information. Please specify [YTN News UP] when quoting.

[Anchor]
It got cold in one day. The whole country is below zero. There is another rain or snow news tonight, so you have to prepare in advance. I will make a detailed weather forecast with the anti-Sung YTN Disaster Advisory Committee. Please come in. It was really cold on my way to work today. The temperature seems to be very different from yesterday morning, but why did it drop so suddenly?

[Planar]
It's really cold. Today, Cheorwon fell to minus 8.7 degrees Celsius, and Paju fell to minus 7.7 degrees Celsius. Seoul also fell to minus 2.2 degrees Celsius, but compared to yesterday, the morning temperature alone dropped by almost 7 degrees. Considering yesterday's daytime temperature, it dropped by about 15 degrees. The sudden coldness was affected by the pressure trough yesterday, but today, the Siberian high pressure from the north went south. As the 1031-hectopascal Siberian high pressure went south, cold and dry air first came into Korea.

The second is the ionization low pressure on the 5km upper floor, so didn't the ionization low pressure create when it snowed a lot last week? In that way, the low pressure is created again, and if the low pressure is created like this, doesn't the low pressure blow counterclockwise from the upper floor? As a result, it plays a role in continuing to bring down the cold air in the northwest toward Korea. Third, looking at the temperature in the sky of 1.5km, the temperature in Seoul was 3 degrees yesterday, but it was 6 degrees below zero this morning. So, it's about 9 degrees lower than yesterday. This is why the temperature has dropped sharply.

[Anchor]
The cold air from the north came suddenly down. I think we can look at it like this, but the first cold wave warning has been issued in Incheon. Cold wave warnings are something I've heard so many times, so I'm familiar with this term, but I'm curious about the criteria.

[Planar]
First of all, a cold wave warning is issued from October to April of the following year in winter. So there are warnings and warnings in the special report, but I'll just tell you today. In the case of a warning, the lowest temperature this morning should drop by more than 10 degrees from the lowest temperature the previous day, and the temperature should be below 3 degrees. It should also be 3 degrees lower than the average temperature. One when this condition is right. Second, a warning is issued when it is expected to last more than two days below minus 12 degrees Celsius, and today's case is the first criterion. So it's quite unique. Usually, warnings are issued separately to regions such as central regions or Gangwon regions, but special cold wave warnings are issued. Today, only Incheon came out. This is very unusual, but in the case of Incheon, the lowest temperature was very high yesterday morning.

Yesterday morning, there was a low-pressure cloud belt right in Incheon. So, the humidity of the sea is also high. That's why cities next to the sea usually have a high minimum temperature, but there wasn't much radiative cooling because the clouds were full. So yesterday, in the case of Incheon, the lowest temperature in the morning was 8.1 degrees Celsius. It was 4.6 degrees in Seoul. But since it went down to minus 2.2 degrees this morning, it fell by more than 10 degrees compared to yesterday. In addition, today's temperature is less than 3 degrees Celsius and less than 3 degrees Celsius than usual, so the only area in the region that meets the cold wave warning standards.

[Anchor]
Cold wave warnings mean that there are absolute and relative standards. And wind gusts are also predicted. It is said to be a wind with an instantaneous wind speed of around 15m per second, how much is this?

[Planar]
First of all, in the case of coastal or mountainous areas, wind is expected to blow more than 15m now, but if it's 15m, the signboard will fly. Last time, when we were about 20m, it was hard to walk properly under the wind. About 15m is enough to fly a signboard, but didn't there be a case in Bundang last time when the wind blew, the signboard flew, and hit a city bus? This is how strong it is. In particular, these winds, of course, become stronger in the mountains, but when you enter a city or something, the building wind enters the area with large buildings. The wind is often much stronger than expected. So, especially in areas such as mountains and coasts, the wind is strong, but even in urban areas, these facilities and signboards must be quite solid.

[Anchor]
It's a wind that's enough to fly the sign, but in the city center, a stronger wind can blow with the addition of building winds. It looks like you need to be careful. But when the wind blows strongly, the temperature decreases. What are the changes?

[Planar]
First of all, in the case of sensible temperature, it is calculated that the wind speed usually drops by 1 degree per 1 m/s from 0 degree to minus 10 degrees. Actually, there are some differences. However, that's how it is generally viewed, so the current morning temperature was minus 2 degrees Celsius, but it is blowing at 3 meters per second. If so, you can think of the temperature as minus 5 degrees Celsius. However, if it goes below minus 10 degrees Celsius, the temperature will drop significantly. From then on, it seems to drop by 2 degrees for every 1m increase. So, in fact, the lower the temperature and the stronger the wind, the faster the perceived temperature drops. Isn't the sensory temperature created by health problems? Because it takes that much heat from our skin, it's the temperature we actually feel, and it's very dangerous, so we've been looking at the temperature recently.

[Anchor]
Then, I think it's important for us to wear winter clothes well so that the wind doesn't come in, so what areas should we be careful about?

[Planar]
It is said that the part where people feel cold the most is the neck part. So first of all, it's good to wear a muffler or something like this around your neck. The second one is the head. That's why the British Meteorological Agency tells me to wear a hat when it's going to get cold. Wearing a hat is also very helpful. So if we put a muffler around our neck, we can raise the normal temperature by more than 5 degrees. Even if you wear a hat, you can raise the temperature by more than 2-3 degrees. And then, in my case, hand. And then feet. These are the places where you lose the most heat.

[Anchor]
Don't forget to wear a muffler. So, you can understand that it's best to wear a scarf, a hat, and gloves. It was this cold in the morning, but will the temperature get warmer during the day?

[Planar]
First of all, the temperature goes up rather than in the morning. Even so, in the case of Seoul, the highest temperature today is about 4 degrees Celsius. So, for the time being, the daytime temperature is almost the Seoul standard except for some days in the middle. It is expected to rise to around 4 degrees in Seoul. So it's going like this, and it's this Friday. The temperature only goes up for six days. So it goes up about 6-7 degrees Celsius and it's cold again from Saturday to next Monday. After it's cold, the temperature rises slightly as the trough of air pressure comes in again around Tuesday. After that, the temperature drops sharply after next Tuesday. So for the time being, it's generally 4 degrees or 5 degrees even if it goes up slightly. It's around this much. Since this temperature continues for the time being, in fact, if the wind blows a little more, the temperature felt during the day is around 0 degrees.

[Anchor]
And it was warm yesterday, but the sky was cloudy all day long, whether it was because of fog or dust. What was this?

[Planar]
Yesterday morning, it was foggy. It's very foggy across the country. If the fog becomes thick, doesn't the fog actually create fog from these condensate substances? So when the temperature rises during the day, it usually turns into haze. When it turns into haze, the sky looks blurry. And it has the characteristic of increasing the concentration of ultra fine dust. So, in the case of Korea, when the concentration of ultrafine dust is high, it becomes foggy when it stabilizes. In the afternoon, ultrafine dust came in from China yesterday. In the central part of the country, ultrafine dust is about 40 micrometers, per cubic meter. The concentration was this high, so the bad degree was maintained. As a result, the air mass changed late at night, and until cold air came in, the clock was generally bad and the concentration of ultra-fine dust was high.

[Anchor]
And since it snowed a while ago, I think some people will be surprised by the news of snow, but I heard it will snow tonight. How long are you coming?

[semi-spanning]
First of all, what snows today is mainly in Incheon, Gyeonggi Province on the west coast, then in the southwestern part of Gyeonggi Province, the north of Chungnam, and Jeonbuk. So if you look at Korea, you can think of it as the west. In this area, about 1cm for snow and about 5mm for rain. And from tonight in Seoul. In the early morning tomorrow. In the case of Seoul, there is a possibility of about 0.1cm of snow and 0.1mm of rain. Even so, Seoul is not actually a place where it usually falls. However, the problem is that even if it falls this much, it freezes right away because the cold air is coming down at night.

So, especially in the case of night or dawn, there are likely to be quite a few road sections that freeze with black ice. In particular, areas with snow or some rain tonight are likely to be icy tomorrow morning, so be especially careful with drivers. I hope that people in those areas generally use public transportation. Especially, the black ice that we call it, is the most dangerous thing. These things usually occur in bridges, bridges, and other places, such as the entrance to the tunnel after the bridge, or in the middle of the tunnel. So in this case, you have to be very careful of the danger before the sun rises in the morning.

[Anchor]
Not only cars but also pedestrians should be careful of sliding accidents. I think this will be the last question. I was worried that the weather was too warm now, but suddenly there was heavy snow and then it got cold again. It's so volatile that it's hard to get a hold of yourself right now. Will this unpredictable weather continue throughout this winter?

[Planar]
First of all, wouldn't January and February be like that and December and February be like that? First of all, that's what I expect. Because in fact, the biggest characteristic of climate change caused by global warming is that the weather is highly volatile. So, it gets hotter than we expected and colder than we expected, and then these things keep changing. As you said, it was very warm before last week's heavy snow and cold wave. It was warm, so there was heavy snow. But anyway, the cold came again, and then yesterday, the cold wave came down again, and this Friday, and then it got cold again on the weekend. The temperature rises a little next Tuesday and then it gets cold. So, these things have actually been cold since the 26th of last week, and even if there are times when the temperature rises in the middle, the temperature is low in the big frame. The reason for this is because we have an Arctic vibration index right now.

It's continuously showing a negative index right now. So if you look at the predictions, I think it will show a negative index until almost the 15th. Then, if the negative index is shown, the upper stream's flow becomes stronger in the north-south flow. So what I'm saying is that there's a possibility that it's cold and something like this is stronger. In addition, if you look at it now, there is a long-term ensemble model 5km above the World Meteorological Organization or the U.S. Meteorological Administration. Showing for 15 days. If you look at this, you can see a pattern in which the high resistance around Korea continues to generally decrease. In this case, the temperature is low, but the problem is that the temperature is not continuously low, but the pattern itself is a little low within a large frame, but in the meantime, the temperature changes continue to rise and fall like a sine and cosine curve. Therefore, as the anchor said, if you do it badly, the temperature seems to jump all over the place.

[Anchor]
The range of temperature changes is so large that I think it's easy to lose health. I think you need to take good care of your health. With the anti-Sung YTN Disaster Advisory Committee.