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Summer heat for Marathon, cooler by Wednesday

Posted by David Epstein  April 15, 2012 09:38 AM

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Temperatures are continuing towards their highs in the upper 70s today. This will be a great day to be outside and enjoy the spring weather. Occasionally, a few clouds will cross the sky but this will be close to a perfect 10 weather-wise.

Weekend forecast
After a great day today, Monday will be significantly warmer with temperatures nearing the 90°F degree mark in the afternoon over the western burbs. Before we get to tomorrow we have a nice night ahead with dry and mild conditions. Temperatures will remain in the 50s much of the night so you can leave those windows open, if you like a crisp room to sleep.

As this summer-like air mass moves into the area, there may be a few clouds the first part of Monday to help keep temperatures down a bit early in the morning. On the weather map, (below) we will notice a warm front to our south. Warm fronts are those boundaries that divide warm air from cooler air. This time of the year the front often divides spring temperatures from those more conducive to summer. The same front in winter would divide winter temperatures from those more conducive to spring.


Marathon Monday

On Monday this front, or dividing line will be running through New England. This front, will mark the boundary between air temperatures in the low 70s and the upper 80s to near 90°F. Portland, Maine should have a temperature around noon of 72°F degrees, while Newton maybe as warm as 90°F. I will continue to tweak the forecast for Patriots day throughout the weekend. You can see my current thinking in the chart below. This heat is going to cause major problems for the runners Monday. People will not finish, heat exhaustion will be an issue and I expect the medical tent to be in full use. Stay tuned, this will be one of the top 5 warmest marathons on record.

temp monday.jpg

Stay tuned to my blog and follow me on twitter. Follow me on Twitter at @growingwisdom The weather has had an enormous impact on the race. Check out the graphic below for some interesting weather that has occurred in the past. marathon weather.jpg

The record high temperatures for Monday are as follows across the area.

BOSTON...84°F IN 2003
Gardening tip of the week

Tuesday and Wednesday
Tuesday will be another great day with sunshine and temperatures no so hot. We should see our highs in the lower 80s for Tuesday. Cooler, more seasonable like temperatures will return for the rest of the week. Highs during the day will be in the 60s with overnight lows in the 40s. There are some indications of some rain next weekend, but I don't want to get too excited for that just yet.

One of my favorite flowering azaleas is the vaseyi variety. This plant, native to the Carolina area is a reliable early bloomer in the garden and will flower in a shady spot. If you are looking for a great plant for early spring color, check this out. It might be hard to find, but its worth the hunt.

Follow me on Twitter at @growingwisdom and check out my latest videos at

This blog is not written or edited by 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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