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Tally of 90-degree days tops annual norm

Baltimore surpassed its annual total of 90-degree days last week but is still equal to or behind tallies of hot days for the past two years.

Twenty-one days in July have reached 90 degrees or above at BWI Marshall Airport so far this year. That makes 34 days at or above 90 so far this year -- four more than the annual norm of 30 days.

At BWI, two days reached 90 in May and 11 did in June.

But despite the seemingly high tally, 2012 is on pace with 2011 and won't meet the pace 2010 set through the end of July.

July 2011 saw 24 days 90 and above at BWI, with 34 days of 90+ heat through the end of that month. 2011 ended with 40 days 90 and above, adding just six days in August.

In 2010, BWI recorded 39 days 90 or above through July, with a total of 57 days for the year.

All three years make 2009 and 2008 downright chilly in comparison. Only 10 days reached 90 at BWI in 2009, and 27 days did in 2008.

Heat is likely to continue in August 2012, according to the National Weather Service's Climate Prediction Center. Maryland has a 40 percent chance of above-normal temperatures for the month, according to the center's models.

The weather service's forecast for the next five days calls for temperatures to hover around 90 degrees.

Have a weather question? E-mail me at sdance@baltsun.com or tweet to @MdWeather.

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