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Fog envelops Hanoi sky

Tuesday, December 24, 2019, 18:00 GMT+7
Fog envelops Hanoi sky
Fog envelops the Hanoi sky on December 24, 2019. Photo: Nam Tran / Tuoi Tre

A thick layer of fog enveloped the sky of Hanoi from the early morning until the afternoon on Tuesday, with weather forecasts showing that the phenomenon could continue over the next days.

The foggy weather was accompanied by a low temperature, forcing local residents to put on extra layers to keep themselves warm.

According to the National Center for Hydro-meteorological Forecasting, temperatures in the capital range from 17 to 20 degrees Celsius and humidity is at 85-86 percent on Tuesday.

Fog envelops the Hanoi sky on December 24, 2019.

Fog envelops the Hanoi sky on December 24, 2019.

“Visibility in the city was at 300 to 500 meters,” said Tran Quang Nang, an official at the weather center.

“The phenomenon can be referred to as advection fog, which occurs when a cold front weakens and moves eastward, bringing about moist air in the area,” Nang elaborated.

Commuters travel on Nguyen Chi Thanh overpass in Hanoi on the morning of December 24, 2019.

Commuters travel on the Nguyen Chi Thanh overpass in Hanoi on the morning of December 24, 2019.

Temperature inversion at higher altitudes combined with a lack of winds near the surface is the main cause of the fog, the weather expert continued.

The foggy atmosphere usually lasts from the morning until the afternoon.   

Commuters travel on Nguyen Chi Thanh overpass in Hanoi on the morning of December 24, 2019.

Commuters travel on the Nguyen Chi Thanh overpass in Hanoi on the morning of December 24, 2019.

The fog will continue to appear on Wednesday, become milder on Thursday and Friday before returning on the weekend, Nang stated.

The air quality will also turn poor during this period as temperature inversion often causes pollutants to disperse more slowly, he explained.

Commuters turn on their headlights in the foggy weather in Hanoi on December 24, 2019.

Commuters turn on their headlights in foggy weather in Hanoi on December 24, 2019.

Commuters turn on their headlights in the foggy weather in Hanoi on December 24, 2019.

Commuters turn on their headlights in foggy weather in Hanoi on December 24, 2019.

A cyclist is dressed in warm clothes in Hanoi on December 24, 2019.

A cyclist is dressed in warm clothes in Hanoi on December 24, 2019.

Tran Quoc Pagoda in the middle of Ho Tay (West Lake).

Tran Quoc Pagoda in the middle of Ho Tay (West Lake)

Foreign tourists walk along Ho Tay on a foggy morning in Hanoi on December 24, 2019.

Foreign tourists walk along Ho Tay on a foggy morning in Hanoi on December 24, 2019.

A foreigner takes a photograph of West Lake in Hanoi on December 24, 2019.

A foreigner takes a photograph of West Lake in Hanoi on December 24, 2019.

Young people take photos of the foggy weather in Hanoi on December 24, 2019.

Young people take photos of the foggy weather in Hanoi on December 24, 2019.

A couple takes a walk along West Lake in Hanoi on December 24, 2019.

A couple takes a walk along West Lake in Hanoi on December 24, 2019.

A high-rise is barely visible due to foggy weather in Hanoi on December 24, 2019.

A high-rise is barely visible due to foggy weather in Hanoi on December 24, 2019.

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