LAHORE: The city witnessed rain which increased chill in the air here Thursday while Met office predicted similar weather conditions for the next 24 hours. Met officials said a westerly wave is affecting most upper and central parts of the country. They predicted that rain/ thunderstorm (snowfall over mountain) is expected in districts of north Punjab, upper Khyber Pakhtunkhwa, Islamabad, Gilgit-Baltistan and Kashmir. Heavy falls are also expected at isolated places.