[Weather] After the snow bomb, the sudden cold... "Winter trailer?"

[Anchor]
This time, we will take a closer look at the cold and future snow prospects with a reporter.

Kim Min-kyung is in the YTN weather and disaster reporter studio.

After the snow bomb, it was really cold this morning. How much did the temperature drop?

[Reporter]
It was the coldest morning in Seoul this morning, with temperatures of minus 3.4 degrees Celsius.

It's 3 degrees down from yesterday morning.

The cold wind especially dropped the wind to minus 5.6 degrees Celsius, so the cold felt by the body would have been worse.

The temperature fell to minus 7 degrees Celsius in Paju, northern Gyeonggi Province, and -11 degrees Celsius in Daegwallyeong, Gangwon Province, and -16.3 degrees Celsius in Anheung-myeon, Hoengseong, Gangwon-do.

There were many places that recorded the lowest temperature in the central region.

In particular, the wind chill in Seoraksan Mountain in Yangyang, Gangwon-do, fell to minus 24.9 degrees Celsius.

[Anchor]
I wonder why the snow stops and the temperature suddenly drops.

[Reporter]
First of all, the biggest reason is, did you see the sky this morning?

Unlike yesterday, it was very clear.

This is because the 'radio-cooling' effect of heat escaping from the ground overnight has increased as the cloud disappears.

Here, the snow that is not melting and piled up everywhere also played a part.

When snow is piled up, the moisture from the snow flies into the air and loses heat, so the temperature drops further.It is similar to the principle that when you put alcohol on your

hand, it instantly cools down as it flies away.

[Anchor]
On my way to work today, there were a lot of places where the snow did not melt and piled up.

I have to be especially careful with the snow that's piled up like this?

[Reporter]
Correct.

You've heard a lot of 'heavy and humid snow' this time.

Construction, which is contrary to the wet theory, can be thought of as snow in the ski resort, but construction is dry with snow grains and crystals themselves even if the temperature decreases due to lack of moisture.

However, 'wet snow' becomes harder as it turns into ice when it freezes.

If you compare it, you can think of 'frozen dumplings'.

If you don't put frozen dumplings in the freezer right away and put them late, they stick together and become lumps that are difficult to remove,
When
freezes as the temperature drops overnight, it hardens into a solid ice cube.

So you have to be especially careful where there is still snow because it can turn into an icy road.

[Anchor]
But I heard it's snowing again on the way home.

[Reporter]
Yes, but you don't have to worry too much this time.

Do you want to see the radar screen where you can see the clouds?

It's a radar screen at 2 p.m.

Clouds are located sporadically around the western region.

The remaining cloud bands on the West Sea come in little by little.

In the southern part of the country, where the temperature is in the video zone, there is rain, and in the middle, there is a place where snow and rain mix or snow blow.

In fact, 1 to 5cm of snow was expected in the metropolitan area from this afternoon to night.

However, the rain cloud came in weaker than originally expected, so the Korea Meteorological Administration drastically revised the expected snowfall.

Southern Gyeonggi Province, where up to 5cm of snow was expected to fall, is around 1cm', and Seoul and Gyeonggi areas are not expected to accumulate snow, but there is only a possibility of sporadic raindrops or snow.

However, as much as 7cm more snow is expected in the mountains of Jeju until tomorrow, and 1 to 3cm more snow is expected in Chungcheong, Honam, and Yeongnam inland until tonight.

[Anchor]
The clouds came in strong at the level of the rainy season yesterday, but it's much weaker now.

[Reporter]
We prepared side by side to make it easier to compare the cloud bands of yesterday morning and this afternoon.

The left side is the snow cloud at midnight yesterday.

The right side is the expected view of the snow cloud at 6 p.m. today from the very short-term forecast.

There's a big difference, right?

The day before yesterday and yesterday, if the center of cold air was on the upper floor in Korea, now the center of cold air has escaped to the northeast as atmospheric congestion has been resolved.

If the barometric bone came in strongly at midnight yesterday, it would be good to understand that this afternoon the center passes and the remaining barometric bone in the back is the last weak influence.

[Anchor]
The snow has been really unusual for the past two days, right?

[Reporter]
Correct.

This time, the unusually high sea temperature caused heavy snow due to blocking the flow of the upper atmosphere.

In addition to the snow clouds that have developed in the West Sea, the fact that there was so much water vapor in the atmosphere, even though it was late November, also added to the impact.

When the temperature is high, the capacity of the water tank that the atmosphere can hold water vapor increases.

Usually, leaves should fall and the atmosphere should gradually dry out by the end of November, but there was a lot of water vapor in the atmosphere because the temperature continued to be high due to the unusually high temperature phenomenon.

However, in the future, as the cold gradually descends, the temperature will decrease and the air will gradually cool down, and the atmosphere will gradually dry out.

[Anchor]
Isn't it like this when it snows in the future?

[Reporter]
Even if the cold air has passed, the sea has a large capacity to hold heat, so the temperature in the West Sea does not cool down at once.

It's not for the time being, but it's recorded an extreme value from the first snow, so if conditions such as blocking are combined like this, heavy snow like this could fall anytime this winter.

As winter is just beginning, we don't think we should relax if snow is forecast throughout this winter.

[Anchor]
Lastly, please also point out the weekend weather forecast.

[Reporter]
Yes, Jeju Island and some parts of Honam are expected to have snow and rain due to the topographical influence.

The cold below zero will continue until morning, and the temperature will rise a little during the day, but the chilly weather will continue at the level of previous years.

There will be no worries about snow rain nationwide on Sunday, but it will rain or snow in the Seoul metropolitan area and other places early next week.

Although specific precipitation and snowfall have not been predicted yet, it is not expected to be as much as this time.

[Anchor]
There is news of snow rain early next week, so I hope it's not a lot. So far, we've been with YTN weather disaster reporter Kim Min-kyung.
Thank you.