京报网讯 今天早晨北京东部和南部笼罩在一片浓雾中，据监测，大兴能见度只有100米，通州能见度为800米，7时30分北京市气象台再次发布大雾黄色预警信号。

Beijing news net news this morning in southern and eastern Beijing enveloped in thick fog,According to the monitoring,Daxing visibility is only 100 meters,Tongzhou visibility for 800 meters,The Beijing meteorological observatory issued a yellow warning signal again heavy fog.

　　目前在蒙古国地区有一股较强冷空气正在东移南下，受其影响，今天傍晚到夜间本市天空云量逐渐增多，天气转阴。

Currently in Mongolia region has a strong cold air is south towards the east,Under the influence of,This evening the city at night sky cloud cover increase gradually,The weather turn Yin.

　　从今天傍晚开始到明晨，本市以及华北中南部地区将逐渐转受高空西南气流的控制，天空云量不断增多增厚，湿度缓慢增大。但风力以及气温变化不大，近地面空气层相对稳定，水汽及污染物容易发生滞留，因此本市能见度将再次出现下降。有可能还会出现能见度小于1公里的雾；南部地区的能见度更差还会低于500米。

From today until tomorrow evening,The city in the central and north China will gradually turn by upper southwest flow control,The sky cloud cover increasing thickening,Humidity increase slowly.But wind and temperature change is not big,Ground air layer relative stability,Water vapour and pollutant prone to detention,So this city visibility will decline again.There could be less than 1 km visibility in the fog;Southern areas of the visibility worse will be less than 500 meters.

　　明天夜间随着冷空气主体过境，会带来四五级的偏北风，届时云消雾散，能见度将明显提升。由于北风将持续到后天白天，空气会变得非常干燥，大家除了要注意防风和防寒，注意用火安全，还要特别注意及时给身体补充水分，预防呼吸道疾病。

Tomorrow night with the main body of cold air transit,The PianBeiFeng will bring four category,Then vanish into thin air,Visibility will be enhanced.Because of the north wind will continue until the day the day after tomorrow,Air will become very dry,Everybody besides should pay attention to wind and warm,Pay attention to safety in the fire,Will pay special attention to timely give the body compensatory moisture,To prevent respiratory diseases.

　　（方玉玲 秦亚堙 蔡文清）

(FangYuLing QinYa Yin CaiWenQing)