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December 24, 2012

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Frost alert issued as mercury plummets

WITH the low this morning expected to fall as low as minus 5 degrees Celsius in the city's suburbs, the Shanghai Observatory issued a yellow frost alert, lowest of the three-scale system, at 4pm yesterday.

Today is expected to be the coldest day of the week as the low is forecast to be minus 2 degrees Celsius downtown. The high is expected to be only 4 degrees with sunny skies, according to the observatory.

It is forecast to take until tomorrow for Shanghai's low temperatures to move out of the freezing range, with warmer temperatures, clouds and possible drizzles coming back by Wednesday.

The low tomorrow should climb back above zero, to around 1 degree Celsius, and the high should be around 9. The weather should turn partly cloudy tomorrow.

Warm and wet streams from the southwest will bring higher temperatures on Wednesday, with a low of 7 degrees Celsius and a high of 9 degrees.

Rain becomes more likely toward the end of the week.

The cold front caused PM2.5 pollution readings to hit 130 micrograms per cubic meter yesterday afternoon. The national standard is a daily average of 75 micrograms. But thanks to less pollution on Saturday, the 24-hour overall air quality rating was still good.


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