From Accuweather, hat tip to Sliding Into Home:

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The abundance of homers is raising concerns that the new stadium’s design may favor fly balls, which should be alarming to the baseball team that invested $243.5 million on pitching last winter, according to the Daily News.

The wind on Saturday during the Yankees’ 22-4 loss against the Cleveland Indians was mostly from the west at 15-20 mph. Given the layout of the stadium, the wind could have had an effect on fly balls in right field. Six home runs were hit by the Indians in the second inning alone.

Although the field dimensions of the new stadium are exactly that of the old stadium, the shell of the new stadium is shaped differently. AccuWeather.com meteorologists also estimate that the angle of the seating in the new stadium could have an effect on wind speed across the field.

The old Yankee stadium had more stacked tiers and a large upper deck, acting like a solid wall in effect, which would cause the wind to swirl more and be less concentrated. The new Yankee stadium’s tiers are less stacked, making a less sharp slope from the top of the stadium to the field. This shape could enable winds to blow across the field with less restriction. In addition, the slope of the seating would also lead to a “downslope” effect in the field which, depending on wind direction, would tend to cause air to lift up in the right field. Fly balls going into right field during a gusty west wind would be given more of a lift thus carrying the ball farther out into right field.

If the stadium seating tier shape is indeed the issue, games will only be affected during times with the winds are from a westerly direction and above 10 mph. This typically occurs during the spring and the middle to late fall. The calmer weather during the summer should lead to a smaller number of home runs. In the meantime, the home run derby may continue.

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This is interesting news and sort of folows the idea of what I was thinking might be the cause due to the open windows in the shell.  I did not consider the different sloping of the seats and how that would create a downward draft with a lifting effect into the right field stands.