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

[Anchor]
This time, we will take a closer look at the causes and future prospects of the extreme cold that came behind the snow bomb 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.

For 'construction', which is contrary to the practice, you can think of the snow in the ski resort,

Construction has no moisture, so even if the temperature drops, snow grains and crystals will be dry.

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]
I was worried that it will snow again this afternoon, but fortunately, it won't snow much?

[Reporter]
Yes, do you want to see the radar screen where you can see the cloud condition?

This is the current radar screen.

Cloud bands came in from the northwest once in the afternoon, and now they are located sporadically in Gangwon-do, Chungcheong-do, Yeongnam, and Honam regions.

These cloud bands in the northwest are expected to come in during rush hour, but they are not strong as you can see, so even if they accumulate, they will be around 1cm or scattered.

However, some areas such as Jeju Island and Honam are likely to continue to snow weak tonight or tomorrow morning because cloud bands still remain on the West Sea.

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?

At dawn yesterday, we also saw a band-shaped rain cloud band during the rainy season.

The day before yesterday and yesterday, if the center of the cold air is in the upper layers of Korea, so the cloud band came in strongly,

Now, as the atmospheric congestion is resolved, the center of the cold air has fallen to the northeast, and the pressure trough remaining behind it has passed weakly.

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

[Reporter]
Correct.

This time, the flow of the upper atmosphere was unusually blocked, and the low pressure stagnated and the increased sea temperature caused heavy snow.

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.

Although not for the time being, it has broken an all-time record from the first snow to the number one snowfall in history, so if conditions such as atmospheric congestion are combined like this, heavy snow like this could fall this winter or at any time.

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 until tomorrow morning.

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.

If this week is like watching a trailer for winter, the temperature will drop again early next week when winter begins in earnest.

Seoul is expected to be around minus 3 degrees Celsius, and some central inland areas are expected to be below minus 5 degrees Celsius.There is also a forecast for

snow.

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

[Anchor]
This has been reporter Kim Min-kyung. Thank you very much.