Big Temperature Swing This Weekend

Weather Blog

Normally we wouldn’t celebrate temperatures in the 60s, but recent trends are getting us into the habit of celebrating even mediocre weather.   After making it into the 60s earlier on Friday, 70s are not totally out of the question by later Friday in the western part of the state, especially if some of the clouds clear out.   If we do make it to the 70s, it would be the first time since November 3rd, 2017!  

Saturday morning starts mild, but then…….

You hear about it often hear in New England, especially in early spring.  It’s the dreaded back door cold front! These have a habit of turning beautiful warm days into raw chilly days, and Saturday looks like a classic setup.  

Early Saturday morning will be quite mild with most spots in the 50s. 

But a back door cold front will start to slide in by late morning and early afternoon; this means that instead of peaking at around 70 (as I had hoped early this week), we will likely be in the upper 50s to around 60 by lunchtime.  By late afternoon and early evening, we slide back into the 40s with a raw wind out of the northeast.

NOTE: Even a shift in timing by a few hours could have a big impact on the high temperature forecast for Saturday, so stay tuned for any adjustments.

Saturday Night Sleet or Freezing Rain?

I feel like this blog keeps getting worse and worse, but we might as well tell you what’s coming.  Late Saturday night into Sunday, some drizzle and rain showers are possible, but some freezing rain or sleet could also enter the mix.   Here is a forecast sounding from late Saturday night from one of the computer models:

The green/red lines to the left of the solid blue line (which I point out with an arrow) show a shallow layer of cold air.  Much of this air mass is actually below freezing which could translate to some sleet or freezing rain.  We will have to keep an eye out for the potential of some slick roads during the Saturday night into Sunday morning period.

Sunday Is Chilly, And Maybe Record Setting

While Sunday won’t be a washout, there will be periods of showers and highs may not make it much above 40.

The lowest high temperature on record for April 15th (Sunday) is 42 set in 1972.  So if we don’t make it to 42, we will set the lowest high temperature record for that date.

Marathon Monday: Wet and Windy

I wish I could tell you the forecast for Monday has changed; it has looked bad all week and it continues to look bad.  Rain is in the forecast from morning to afternoon, and some of it will be heavy at times. 

Winds will also be strong out of the east for a good part of the day…starting from the east-northeast in the morning and then ending from the east-southeast.  

What Could Change?

This might really be splitting hairs, but there is a chance that the timing of everything could slow down a bit.   If it were able to slow down by a few hours, the heavier downpours might hold off until late morning or afternoon.  Even going by this slightly more “positive scenario”, there would still likely be some rain in the morning for the race and later in the morning for the Red Sox game (if the game is played). 

We will keep you updated through out the weekend.
-Pete Mangione

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