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Frost and freeze warnings for early Tuesday morning

Posted by David Epstein  May 13, 2013 06:04 PM

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A chilly air mass is in place and this means a cold night and frosty morning ahead. Frost advisories and freeze warnings are up for varies areas. Check out the map below to see if your area is under either warning. This air over us has originated in Canada where it is still quite chilly and will stick around through Wednesday morning.

You wonder; how cold it can be up there this time of the year? After all, many areas in northern sections of that country are enjoying over 18 hours of daylight. In Iqalit, which is up near the Arctic Circle the sun rose this morning at about 3:30 AM and won?t set until after 9:30 this evening! One of the things on my bucket list of life is to spend some time in the far northern reaches of the planet during those long days.

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

cold canada.gif
The temperature in Iqalit, when I checked around 8 AM, was only 10F and it was snowing. Further north and east there are several spots below zero this morning in spite of the huge amounts of daylight. That cold air is not coming south, but a piece of it will be here the next two days. The air is also very dry which allows for wide fluctuations between the early morning and late afternoon. After the sun sets this evening the temperature can fall as much as 10 degrees in a few hours.

Tomorrow and Wednesday mornings are going to be cold. Many of us will see our thermometers back in the 30s. Those of you that live in a city, by the water, or higher on a hill won?t be as cold as if you live in a valley, inland or a very rural area. This time of year, when we get late frosts, who sees the grass white or wet in the morning can vary dramatically in a very short distance.
Freeze warning.png

On my morning walk this morning there was a frost in the center of the field I walk through, but nowhere else in the area. I expect tomorrow to be about 5 degrees colder and the extent of frost to be greater. There is a frost warning already in effect for tomorrow. Areas to the north that don't have an advisory will still have a frost. Since the growing season is not officially underway, the warning isn't issued.

Now, if you don?t have any plants outside this whole discussion of a few degrees in temperature is meaningless to you. For you, grab a heavier sweater or jacket the next couple of mornings and get excited about the milder air for the second part of the week.

If you have any warm weather plants outside AND you live in an area prone to frost protect them or bring them inside for a couple of nights. There are certain covers that work better than others. If your plants are small, inverting a large Styrofoam cooler over them would be perfect. If you have a larger area, use an old sheet. Burlap, row cover, fleece blankets, and even the grill cover will work. I don?t like plastic tarps as they can trap moisture, but in a pinch they are fine.

Beyond the cold starts to the day we have some very nice weather this week. While there will be the opportunity for a couple of showers later this week, much of the next 10 days looks dry and mild. While high temperatures this afternoon will stay under the 60F mark, by tomorrow we will add 5 degrees and then another 5 for Wednesday. By the time we hit the end of the week 80F is not out of the question.

The weekend is looking warm with some sunshine. Whether or not we see any shower activity is still a bit of question, but I?ll be answering that this week.

Gardening this week
Japanese maple trees are one of the best ornamental trees you can put in your yard. I have a total of about a dozen scattered everywhere from the front of the house to the back. Check out some of the best varieties in this week's video.

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

This blog is not written or edited by Boston.com or the Boston Globe.
The author is solely responsible for the content.

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About the author

David Epstein has been a professional meteorologist and horticulturalist for three decades. David spent 16 years at WCVB in Boston and currently freelances for WGME in Portland, ME. In 2006, More »
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