From the ABC 7 Weather team

Archive for category Travel December 2014

Coastal Storm Brings Wet Weather Beginning Monday Night

December 7, 2014 - 05:58 PM
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It's been a grey start to December, but we finally saw a nice, clear day today.  This was the first fully sunny day since November 21st!  Soak up the sun early tomorrow morning because clouds will quickly thicken, as our next weather system approaches the area.

A developing area of low pressure, off the coast of the Carolinas, will increase cloud cover through the day Monday.  With the clouds, temperatures will only reach the mid 30s by the afternoon.  Here is a look at forecast highs on Monday.

Forecast Highs Monday

Both the morning and evening commutes will be dry, with wet weather from the coastal storm arriving after 8 PM.  Temperatures won't fall much overnight Monday into Tuesday, in fact, temperatures may actually climb a few degrees with an easterly wind component.  Check out our local simulation of radar at 10 PM Monday (1st image below) and 6 AM Tuesday (2nd image).

Local RPM Model Monday 10 PM
Local RPM Model Tuesday 6 AM

This model depicts all rain, which seems to be the trend among most guidance.  As the coastal low tracks farther north Tuesday, there may be a brief transition to snow late Tuesday night well NW of D.C.  Little to no accumulation is expected.  In fact, by Tuesday at 8 PM the coastal storm will be greatly impacting New England.  Here is a simulation of the coastal storm at 8 PM Tuesday.

Surface Features Tuesday at 8 PM

This will be a predominately rain event for us with the greatest snow potential over interior New England.  Check out forecast snowfall accumulations by Thursday afternoon.  Areas shaded in pink could receive over 10" of snow.

WxBell GFS Forecast Snow Total By Midday Thursday

The area of low pressure will get cut-off from the jet stream midweek and will spin freely over New England through at least Thursday.  That means added clouds for us Wednesday and Thursday with possible light rain and snow showers. 

There are still uncertainties to the forecast, since the coastal storm has yet to develop.  The Stormwatch weather team will continue to update the forecast, as new information becomes available. 

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