Temperatures in Hanoi set to drop as cold spell nears Northern border
Showers, thunderclouds develop across multiple areas
North remains cool with rain, South turns evening thunderstorms
Patchy fog grips Northern region while Southern region braces for localized heat
Cold spell intensifies during New Year holiday, Northern region to turn colder
Northern region to brace for cold spell after Christmas
Heavy rain expected in many areas today
Tropical depression forms in East Sea
