RIYADH — The National Center of Meteorology has predicted that severe cold waves and dusty winds would hit most regions of the Kingdom from Tuesday to Saturday. In a forecast published on Sunday, the center said that temperature in the northern regions would reach -4 degree Celsius, with a likelihood of snowfall. It called on the public to adhere strictly to the instructions issued by the concerned authorities and to follow up the weather reports. Moderate to heavy rains were witnessed in many regions of the Kingdom during recent days.