Active cold air less than average years and 2014, but has caused 3 bold spells, frosts; particularly strong cold air strikes occurred on the night of 6/1 has reduced the Northern heat deep background in Sa Pa, Lao Cai province appeared to rain snow and ice.The hot sun played out constantly with 6 heatwave, the intensity is stronger than average years, much more than that in 2014, in the central area from Thanh Hóa to the South appeared 2 heatwave stretching wide area, many places have exceeded historical observation period. Only 5 major widespread rainfall over the country, however great the first widespread rainfall of 2015 occurred on 9-11/1, earlier than 2014. Waves of heavy rain spreading from August 26-28/3 in the Quang Tri province to Quang Ngai province is against the rules and yet ever seen in the series monitoring data.
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