Wednesday July 24, 2013 | 08:24 AM
Posted by David Epstein

 Some thick fog and low clouds greeted Mainers this morning and the air feels quite thick with humidity.  The good news is that drier air is poised to move into the region during the day and by sunset the air will have a crispness to it we have not felt in a while.  There are some challenges to the forecast beyond today and especially later tomorrow evening and Friday.  

I'll be updating the details of the weather on Twitter at @growingwisdom Please follow me there. Feel free to comment or ask questions too.
 
First, let’s look at the dry air. In Albany, the dew points are in the 50s and skies are partly sunny.  That dry is slowly making its way east and will be here later today and this evening.  The leading edge of the dry air is marked by a cold front.  The front is moving at a snail’s pace so the exact timing of its passage isn’t easily predicted.  
 
Being on the warm side of the front, for much of the day, means we will experience another warm and humid afternoon with highs getting into the upper 70s and  lower 80s.  As the front pushes through, there could be a quick pop-up shower, but the chances are low it will happen.
 
The front will pass offshore early tonight and all areas will enjoy a much more comfortable night.  I can’t remember the last time I forecast anyone to have temperatures fall into the 40s, but that is exactly what we have for Thursday morning.   Along the coast, lows will be in the lower and middle 50s.
 
My next forecast challenge comes quickly tomorrow and Friday.  This slow moving front is going to stop and get stuck just offshore.   Fronts that get stuck are perfect breeding grounds for clouds and precipitation.  Areas of both will ride northward along the front.  The image below shows what the radar could look like, according to one computer Model, later tomorrow evening.  Notice all the rain just off the entire Atlantic coast.  Any slight deviation westward pulls all that rain into eastern New England.  This is a real possibility and will have to be watched carefully.   If we end up with rain, it would tomorrow afternoon into Friday afternoon.  The best chance for rain is of course closer to the coast and points south.  Temperatures tomorrow will be much cooler as we have an onshore wind.
 
Along with the chance for rain will come more cloudiness.   Neither Thursday nor Friday will feature 100% bright blue skies, but at least it won’t be hot and humid.  I think that tomorrow will be a nicer day with more in the way of sunshine, while Friday sees a thicker cloud cover. It just seems like we can’t get a string of nice days this summer.  It’s either too hot, too humid, too cloudy or too wet.
 
There will be a quick period of dry air for Saturday when there will be some sunshine and pleasantly warm temperatures.  I don’t expect much humidity on that day either.  Sunday another front approaches from the west and brings a few more clouds and the chance for a shower or storm.   Highs over the weekend will near 80F.

Gardening this week Pests in the garden are a problem for any grower. There are now better and better organic controls for gardeners that allow good control without the harsh chemicals. Check out the video below and see how I am controlling some of the pests in my own garden this year.

 

I'll be updating the details of the weather on Twitter at @growingwisdom Please follow me there. Feel free to comment or ask questions too.

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About the Author

David Epstein has been a meteorologist for more than 25 years. He spent 16 years in Boston and currently freelances at WGME13 in Portland.

In 2006, David founded GrowingWisdom.com, a business producing educational and marketing videos for the green industry. He currently is a professor at Framingham State College, teaches Jan Plan at Colby College and owns Bloomscapes Inc., a landscape design business.

David authored "Gardens Of New England" and his work has been published in Grolier's Science Annual for 10 years. He lives in South Natick, Mass., and has a summer home in Harpswell.

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