Heavy fog warning is issued by Ji’nan Meteorology Bureau.

　　Heavy fog orange warning and yellow warning were issued by Ji’nan Meteorology Bureau is succession on February 20th , poor visibility in the urban area but increasing temperature. The fog dominated by radiation fog will continue to 21st and reduce on 22nd . Heavy fog yellow signal was issued for the second time at 4:00 p.m. and till the night of 20th . Fog of less than 500-meter-long visibility appeared on 20th night and 21st morning in most part of the urban area, and less than 200-meter-long visibility in certain areas. Citizens should be aware of in advance.