Monday April 22, 2013 | 08:17 AM
Posted by David Epstein

 Temperatures are winter cold this morning with most places under the 30F mark and several towns in the 20s. Temperatures this cold in late April while not typical are not record breaking.  It is unusual enough for a frost warning to be put into effect for much of Cape Cod and the islands where these kinds of temperatures are more unusual.   

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

The next couple of days will see cool air firmly in place across the region with a very chilly day tomorrow.  If you have a home barometer you might have noticed how high it was this weekend.  High pressure means the air is sinking over a given location and that sinking air piles up and raised the pressure.  High pressure is usually associated with nice weather and in this case, chilly air.  Some people feel emotionally better during high pressure days and some of those aches and pains can also be somewhat less intense.  That sort of stuff is more anecdotal than research based although there is some out there.
The high pressure system that gave us a nice clear Sunday will be moving away later today as a low pressure area and its associated area of clouds and rain moves up the coastline.  Right now it appears the bulk of the precipitation will stay offshore, however, there will be a very raw east wind developing and that will keep coastal temperatures very chilly the next few days.  I expect highs along the Maine coast to remain in the 40s both today and tomorrow before warming up again Wednesday to more seasonable levels.  
Notice the radar image below.  This is one prediction of where the heaviest showers will be from our upcoming system later Tuesday evening.  As you can see, the bulk of the heavier rain is towards Cape Cod and further off the coast.  This means that the chances of significant rain are very low for Maine.  As the wind comes in from the ocean, this can bring some low clouds and a few periods of light drizzle, especially Tuesday.  The most notable weather variable tomorrow will be that chilly air.
Wednesday does look like the nicest day of the work-week with the abundant sunshine and milder temperatures.
On Wednesday night and Thursday another system, a cold front, will cross New England.  This will provide the energy for another round of showers that look to cover much of the area.  I am not forecasting a washout from this, but showers are back in the forecast. The best chance for rain appears to be later Wednesday night and early Thursday.  As we head for Friday sunshine returns and this will set up a nice weekend.  Right now the entire weekend looks dry and mild with approaching 60°F.  Mornings will still be a bit chilly, but not frosty.

I'll be updating gardening tips and weather information on Twitter at @growingwisdom Please follow me there. Feel free to comment or ask questions too.

Gardening this week For the past several weeks I have been enjoying harvesting claytonia from containers off my deck. Claytonia is a great little plant that can be easily wintered over by covering your containers or putting them in the garage. You can then move them outside in early spring and watch them resume growing.

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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, 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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