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November 28, 2012

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City given slight break from cold as drizzle, overcast skies move in

SHANGHAI'S sky is expected to turn overcast with a chance of drizzles in the next few days while the mercury should rise and become stable, forecasters said.

It is expected to warm up to a high of 15 degrees Celsius today, with the low at 8 degrees. Yesterday's high was 12 degrees.

Shanghai had the coldest morning of the season yesterday with the low dipping below 5 degrees - to 4.8 degrees Celsius downtown - and around 2 degrees in the suburbs. The coldest area is the Qingpu District where the low dropped to -0.2 Celsius degrees, according to the Shanghai observatory.

After today, temperatures are expected to stay between 8 and 13 degrees for several days.

"The warm and wet air masses strengthened these days and the city should get a little warmer," said Wu Rui, a chief service officer of the observatory. "The temperatures should be stable in the next few days until the next cold front, which is expected to affect the city around next Tuesday."

The strengthening of the warm air also delayed the city's entry into the meteorological winter as the average temperature should rise above 10 degrees Celsius today. Winter starts when the average temperature is below 10 for five straight days.

Also, early yesterday, part of the city was shrouded in fog.

The city's air quality yesterday remained moderately polluted almost the entire day. The air quality index, or AQI, rose about 150, into the range of moderate pollution, starting at 4am as pollutants accumulated amidst light winds. AQI is based on six indicators.

The major pollutant was fine particle PM2.5, which remained above 120 micrograms per cubic meter in the morning and reached a peak at about 150 micrograms at 10am. The readings, though started to drop in the afternoon, remained around 80 to 90 the rest of the day. The PM2.5 reading for the latest 24 hours was 126.4 micrograms per cubic meter. The nation's limit for PM2.5 in 24 hours is 75 micrograms per cubic meter.


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