Dec 8, 2014 6:48 PM
Winter Storm WARNING and Winter Weather Advisory Remain in Effect for the Granite State
Source: NH1 Chief Meteorologist - NH1.com
Winter Storm WARNINGS and Winter Weather Advisories remain in effect from the National Weather Service for the Granite State with the Winter Storm WARNING going all the way til tomorrow afternoon. Folks under the Warning will see the most significant snow accumulations along with some ice. Improvements are starting to occur across the Advisory area as temps climb above freezing.
A bit of everything on the way for the Granite State over the next couple days. With an area of low pressure moving up the east coast and parking itself over Long Island, this will draw in warmer air from the Atlantic which sets the stage for a transition from snow to rain.
This storm system looks to be with us through Thursday, but the most significant impacts with snow, ice, rain, and wind will come Tuesday Afternoon and Tuesday Night. Folks across the higher elevations from Monadnock up through western reaches of Hillsborough and Merrimack Counties, the Upper Valley, northern Lakes, and points north have the best chance to see a heavy wet snowfall which combined with gusty winds could lead to power outages. Amounts of 3"-6" and 6"-12" will be possible in these areas with the highest amounts from the Upper Valley through the Mountains and Great North Woods. Even here I expect the snow to eventually mix with and change over to rain, especially once we get to Tuesday Night. In the middle of that transition, there could be some freezing rain which may lead to ice accumulation on the order of 0.10"-0.25" Elsewhere ice accumulation doesn't look to be as big of a deal.
If that wasn't enough, there's a heavy rain aspect to all of this which could lead to flooding. Folks from the Merrimack Valley and points south and east will see the longest period of plain old rain which looks to be on the order of 1"-2" with locally higher amounts. With the frozen snowpack on the ground, the ground will have a tough time absorbing the rainfall. This leads to runoff issues with urban and poor drainage areas needing to be on the lookout especially for flooding.
Primarily rain showers are expected for most Wednesday, then we could see a change back to snow showers on Thursday. This activity looks to be light at this time so I'm not anticipating big accumulations there. I will still be monitoring for any changes regardless so stay tuned!