Chris Lambert

Challenges... Say It Ain't Snow

Posted by Chris Lambert

Not that weather in New England is ever easy, but this storm coming up the coast will certainly present it's challenges.  The biggest challenge may be figuring out how the snow/mix/rain set-up plays out. 

Precip starts between 2-4PM for many, and that means a dry morning commute and lunch. The heaviest precip and wind occurs in the evening and overnight.

What I've noticed over the last few model runs is a track farther east.  If that's the case, our wind stays more out of the NNE rather than going east, and that means colder weather gets locked in.  It also means that dew point levels stay low.  That's important because with dew points running near 20 and actual air temperatures tomorrow afternoon running near 40-45, a process called evaporative cooling can occur which allows rain to turn to snow.   What happens is, the precip starts as rain, but as some of those rain drops evaporate into water vapor, the dew points go up, and the temp goes down.  A spread of a dew point of 20 and temp of 45, likely meets in the lower to mid 30s when precip becomes heavy enough, and that changes rain to snow.

I don't expect much, if any accumulation in the Boston area, maybe a slushy coating around Rte. 128 on grassy surfaces as rain and snow battle it out for a few hours in the early evening.  The snow will lose that battle to rain, although that process takes longer outside 495.  It's not out of the question that some of the highest elevations in the Worcester Hills, Manadnocks pick up 2-4" of wet snow, most accumulation on trees, grassy surfaces and car tops.  Perhaps even an inch or so of snow near and outside 495, into the city of Worcester, on grassy surfaces, but not as much on the pavement (ground temps are warm).  It all depends on the track of the storm.  If it's a bit more west, these totals are lower,  but higher back through the Berkshires. 

Rain totals along the coast are 1-2" with the highest totals across the Cape and Islands.  Also winds peak tomorrow evening at 40-50mph with a gust or two near 60 across the Cape.   Tides are astronomically low, but minor coastal flooding/beach erosion is possible.

Chris Lambert

50/50 Weekend

Posted by Chris Lambert

We're off to an iffy start to the weekend as nuisance rain and wet snow moves across the area.  While it's not a well organized area of low pressure, it develops right near us midday, and that'll be enough for a tricky forecast.  Light to moderate  rain/snow is on and off early this morning with a heavier burst of precipitation possible late morning, through mid afternoon in eastern MA (11:00AM-3:00PM).

Posted 01/18/14, 6:54am
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Pete Bouchard

Final Days

Posted by Pete Bouchard

That's the way to get it done! Fine finish to the workweek as sun dominated and winds behaved.

I submit that is the one - and perhaps only - reason these days have felt springlike in this extended thaw. If the winds were gusty on a day like today, the sun (albeit a little stronger these days) is really no help.

Posted 01/17/14, 5:06pm
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Jeremy Reiner

Great Mid-Winter Weather

Posted by Jeremy Reiner

Nice mid-winter weather? Here's how I envision it:


*Mild temps (40 or higher)

*Little to no wind

That last bullet point (IMO) is probably the biggest when outside this time of year. After our morning fog lifts out of here all three of those criteria will be met this afternoon's Friday. #Winning.

Posted 01/17/14, 7:04am
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Pete Bouchard

Colder Temperatures Cometh

Posted by Pete Bouchard

As far as blah days go, this was the blahest.

Fog blanketed the area as winds remained light and variable. We're still looking at some fog, but the thickest part of it should only be during the first half of the night. After that, gentle winds should "mix out" some of the heavily fogged in areas.

Posted 01/16/14, 5:24pm
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