Feb 19, 2015 6:22 PM
Clayton Stiver's Latest Forecast for the Weekend Storm
Tracking yet another storm system to bring accumulating snow to NH this weekend. There is also the possibility that a little ice and rain could mix with the snow.
Low pressure will be tracking up across the Kentucky Valley and Ohio Valley late Saturday Night and will track across New England early Sunday Morning. Because of this track, a south wind will usher in some warmer air to NH which may be enough to raise the temperatures above freezing for folks in southern NH and the Seacoast. Initially, snow will overspread NH mainly after sunset Saturday. This will continue through the overnight but with the warmer air building in, it's possible after midnight through sunrise Sunday, the Merrimack Valley and Seacoast could see a mix with some sleet and freezing rain and maybe even plain old rain, especially at the Seacoast. If the storm tracks further south, then the air would be colder and this would make for all snow. If the storm tracks further north, then the mixing with ice and rain could spread north across NH.
This system looks to be moving fairly quickly so I think after sunrise Sunday, a lot of the precipitation will have moved out of NH with the exception of the Seacoast where some snow and rain may hang on until say noon. Because of the quick movement of this storm, snowfall amounts don't look to be too impressive. Right now models are suggesting 2"-4" or 3"-5" for much of NH. Any ice accumulation should be less than .10" Of course these amounts are still enough to make for slick roads, plowing and shoveling, and added weight to snow on the roof.