unusual weather

基本解释

The northern lights result from an unusual weather phenomenon that creates bright colors in the night sky.
北极光由一种不寻常的天气现象所形成，使黑夜的空中出现明亮的色彩。
edu.sina.com.cn
One familiar technique they use is to attribute to global warming almost any unusual weather event anywhere in the world.
他们惯用的伎俩是把全球范围内任何地方发生的不寻常的天气事件都归咎于全球变暖。
Unusual weather was thought immediately to blame, though the underlying cause is probably chlorine-rich chemicals in the stratosphere.
尽管根本原因可能是平里层中富含氯的化学物所致，矛头却立即指向了异常天气。

What we know is that, at this moment, unusual weather patterns are a bigger factor affecting some 6.9 billion individuals around the world.
FORBES: Global Food Wars
This year's race didn't seem to offer any of the usual sidelights: neither unusual weather nor a surprising American contender nor even the question of trying to figure out whether the Robert Kiprono Cheruiyot of Kenya, who won in 2010, was related to the Robert Kipkoech Cheruiyot of Kenya who had won four times before.
NPR: Reporter Shares Account Of Bomb Blasts At Marathon
When instead it was reported there had again been additional jobs lost, it was rationalized that the unusual stormy weather in February had held companies back from hiring.
FORBES: ADP Report Brings Big Disappointment