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Unsettled weekend starting tomorrow evening

Posted by David Epstein  February 22, 2013 10:00 PM

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A weak storm system will affect the region beginning Saturday night and continuing until Sunday morning. This storm will not become very large so snowfall will not be heavy at any time, therefore snow amounts will be minimal. Temperatures are going to be within a few degrees of 32F during the storm and at times snow will change to rain and then back to snow. This flip-flop of precipitation type will continue much of the storm, before a final change to snow as the precipitation ends later Sunday. These kinds of storm produce very different amounts over short distances. For example, cities and towns such as Newton, Brookline, Somerville, and Milton could have different amounts of snow across their own borders. There is a winter storm watch up for areas most prone to reach 4 or more inches of snow, but I suspect this will be dropped overnight as the storm looks quite minimal. wsw blue.pngI'll be updating the forecast all day on Twitter at @growingwisdom I'd love your help tomorrow and Sunday. Tweet me your temperature and whether it's rain or snow.

The ultimate position of the rain/snow line throughout this storm will determine the final snow amounts. Even if you end up with all snow, amounts won't be very high. I expect the rain line to push north and west during the night, before turning around and collapsing to the coast during Sunday. The timing of any change to rain and back to snow will make an enormous difference in what new snow is on the ground Sunday afternoon. Additionally, a track further east could lower snowfall even further. This is why I have Boston getting very little snow. surface map this weekend.pngIt’s not often 1 degree makes a huge difference in the forecast, but this is that type of event. For example, I expect, for a time, rain to be falling at 34F in Boston while Sudbury is snowing and 32F. When the rain does change back to snow, it will be quite heavy and wet and stick to everything. I now don't expect enough snow to cause power issues. The good news is that our wind will not be particularly strong, and that helps lessen the chances of widespread power problems.
south new snow.png

The storm will not be as strong as some others this winter and our tides are not astronomically high this weekend. While there can be some minor coastal beach erosion from this storm, that will not be a significant player in this system. Winds can gust up to 25 miles per hour off the south coast and the Cape, but inland areas will see little wind at all.

Any winds down just after dark Sunday after being brisk during the day. The heaviest precipitation will fall from about 9 PM Saturday to 9 AM Sunday. Monday and Tuesday morning look dry and mild with plenty of melting. Unsettled weather returns for the second part of the week.

Gardening this week
With another storm on the horizon for the weekend you might feel like spring is still very far away. The reality is that in just a few weeks, many of you will be able to get into your gardens and start growing for another year. Earlier this month I went to New England Grows which is a trade show for those who work in the industry. Although not open to the general public, in this week's video I share some of the latest trends and newest plants for 2013.

I'll be updating the forecast all day on Twitter at @growingwisdom please send me your reports there.

This blog is not written or edited by Boston.com or the Boston Globe.
The author is solely responsible for the content.

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About the author

David Epstein has been a professional meteorologist and horticulturalist for three decades. David spent 16 years at WCVB in Boston and currently freelances for WGME in Portland, ME. In 2006, More »
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