Saturday, December 12, 2020

Wintery weather in the upcoming week

Things will turn quite wintry here in southern New England for the upcoming work week, with two chances for snow and cold temperatures. 

The first chance for snow that we're watching out for will be on Monday, as low pressure makes its way up the Atlantic coast.

(Pivotal Weather)

The operational GFS model has trended more and more towards some moderate accumulations of snow for Monday, especially near the shoreline. Expect that round of snow to occur in the afternoon to evening hours, with shoreline areas seeing a mix of snow and inland areas seeing greater chances for an all-snow event. Here is what the GFS thinks for Monday, with a 10:1 snow-to-liquid ratio. I do think some of these snow totals will be a bit overblown due to this being a fairly warm winter weather event, but there is moisture that will give some accumulating precipitation.

Total accumulated snowfall though Monday night (Pivotal Weather)

After Monday's event, we'll see a break in the action with cold temperatures and high pressure for Tuesday.

By mid-day Wednesday, another low pressure system will make its way northward, and with this one, there will be abundant cold air in place and sufficient moisture to produce a significant winter storm. This one has the makings for plenty of precipitation, as you have the cold air form the high to our north, as well as the moisture from the low to off the coast of New Jersey.

(Pivotal Weather)

There was plenty of hype about this storm earlier this week because ensembles and operational models were in agreement pretty early on. I did not buy in so early, but now confidence is increasing that we may see more than 6 inches of snow.

Just for fun, here is a map showing the GFS total snow accumulations from now through next Thursday morning. I'll take the under on this one, but we should expect some accumulating snow in the upcoming week.

Total accumulated snowfall through Thursday morning (Pivotal Weather)




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