Before dawn on January 19, Typhoon Ada (international name Nokaen) weakened from a tropical storm to a tropical depression due to the strong impact of the northeast monsoon.
In the latest storm news at 10 am on January 19, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said that the center of Tropical Depression Ada is located about 445km east of Casiguran, Aurora province, at 16.5 degrees north latitude, 126.3 degrees east longitude.
The strongest wind near the center of the tropical depression is 55 km/h, gusting at 70 km/h, the center pressure is about 1,000 hPa. This system is moving in a northeast direction at a speed of about 10 km/h. Ada's strong wind circulation still covers a wide range, with strong winds spreading to a radius of about 340 km from the center.
Although not directly landing in the Philippines, Ada triggered moderate to very heavy rains in many areas, especially Caraga, Eastern Visayas and the Bicol region. Prolonged heavy rains have caused flooding and landslides in many localities.
The Philippine National Disaster Risk Reduction and Management Board said that as of the morning of January 19, at least 2 people have been recorded dead and 2 others injured, all in the Bicol area.
According to PAGASA, on January 19, a low trough or extended part of the Ada tropical depression may still cause scattered rain and thunderstorms in Bicol, Aurora, Quezon and Northern Samar.
Although storm warning signals have been completely removed since the evening of January 18, the combination of the perihelion of the low pressure and the northeast monsoon continues to cause strong winds, even gusts in many provinces, especially in the north and east of the Philippines.
Forecast for the next 24 hours, Ada will move mainly in the east-northeast direction, then shift to the east to east-southeast direction from the evening of January 20 to January 21. Dry air continuously pouring down from the northeast monsoon is believed to be the main reason why this system continues to weaken.
PAGASA predicts that Ada is likely to weaken into a low pressure area on January 21, or even earlier.
At sea, Ada's influence combined with the northeast monsoon makes rough seas still very worrying. Waves up to 4m high are forecast to appear along the coast of Isabela and the east coast of Cagayan. Ada does not affect the East Sea.
According to the northeast monsoon and cold air bulletin of the National Center for Hydro-Meteorological Forecasting of Vietnam, in the past 24 hours, cold air continued to move south.
Cold air began to affect from the evening and night of January 20, then strengthened strongly on January 21 and expanded to the Northeast, Northwest, North Central and Central Central regions.
From January 21st, the North and North Central regions will turn cold; the mountainous and midland areas of the North around January 22nd - 23rd are likely to experience severe cold, with severe cold in some places.
The lowest temperature is commonly 11-14 degrees Celsius; mountainous areas 8-11 degrees Celsius, high mountainous areas in some places below 6 degrees Celsius.
In Hanoi, from the evening of January 20 to January 22, there will be scattered rain, from January 21, it will be cold, the lowest temperature is 12-14 degrees C.
