GFS + NAM Combined Snowfall Map

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By Nick DiGiovanni on November 6, 2012, 10:46pm Last modified: November 6, 2012, 10:47pm

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For my snowfall map I combined the outputs of the GFS and NAM with each other.

The NAM shows a bit less snow for the area. It has the most accumulation in Northern Fairfield County and North-Western New Haven County in the areas of Southbury, Oxford, Waterbury and Wolcott. The snow starts to fade off as you enter Litchfield County and anywhere south and east of these areas. The most accumulation would be 3", maybe pushing 4" in the highest elevations nearing 900-1000'.

The GFS shows snow for the whole entire state. It shows 6"-7" in Northern Litchfield County. 4"-5" for Northern Fairfield, Southern Litchfield, and North-Western Hartford County. 3"-4" for Central Fairfield, Northern New Haven, and Central Hartford Counties. 1"-2" for Tolland, Windham, Southern Fairfield, Southern/Central New Haven and Northern Middlesex Counties. Southern Middlesex and New London Counties would get under 1" of snow accumulation.

I combined the GFS and NAM to meet in the middle for snow amounts and I took the real estate the NAM covered and extended it to cover more territory with the core to still be in Western Central CT or NY. The GFS shows a stronger situation up near Albany where 8" is possible. The NAM brings the most snow into Connecticut.

Based on past experiences like the storm of January 2011 and Hurricane Sandy, I have to lean more towards the NAM. This is as of 9:30pm, Tuesday night. This could easily change, follow my Twitter @Nick_CTwx4cast for frequent updates and newer maps. 

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Nick DiGiovanni

Town: North Haven, CT  

Reporting for WXedge since February 2012.

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