Left: GFS model simulation for Sunday night; Right: European model simulation for Sunday night (WeatherBell.com and StormVistaWxModels.com)

For the third time in less than a month, a coastal storm may affect the Mid-Atlantic. This time a storm may brew in the days leading up to Thanksgiving.

Computer models have been fairly consistent over the last two days in developing low pressure off the coast of the Carolinas Sunday or Monday. As always, exactly where the storm forms, where it tracks, and how strong it gets will determine its exact impacts. There’s also a chance a storm doesn’t form or tracks harmlessly out to sea.

Here’s what I can say right now...

* The timeframe - subject to change - is most likely Sunday through Wednesday

* Initial simulations show a weaker storm than either Superstorm Sandy or last week’s Nor’easter

* Cold air is seemingly lacking, meaning snow potential is low. This is probably a rainmaker for most (high elevations excluded), assuming it materializes.

* It may be a slow-mover with an extended period of gusty winds and high seas for coastal areas.

As the storm could affect the East Coast as we approach the year’s busiest travel time, we will keep you posted.