Wednesday March 10 2021 Forecast (6:56AM)

37 Comments

DAYS 1-5 (MARCH 10-14)

A display of March temperature variability today as inland sections warm and the coast is chilled by the development of a sea breeze. This is the result of high pressure overhead, light wind, a warming air mass and plenty of sun to work on heating the landmass, which results in rising of warmed air, which then has to be replaced by air from somewhere. The logical “choice” by the atmosphere: the air over the chilly Atlantic, more dense, sitting right at the surface and ready to move on inland to take the place of the departing (rising) warm air. That is your sea breeze – and we’ll see it today. Tomorrow though, it’ll be different, as we will be in a stronger southwesterly air flow due to a stronger pressure gradient (different between high pressure off to our south and low pressure passing to our north). But while this southwest wind warms most of us up, it will be much modified passing over Long Island Sound therefore will prevent the South Coast from warming too much. We also see a smaller scale version of this along our irregular eastern shoreline where pieces of land stick out in such a way that there is enough water to their southwest to cool them down as well. We’ll see this in places like Nahant MA, the south side of Cape Ann, and other localized places. But for the city of Boston, there will be a significant difference, perhaps as much as 20 degrees, between today’s and Thursday’s high temperatures. As has been the case for a couple of days, how warm it gets on Friday will depend on the timing of a cold front. Actually, it looks like 2 fronts are going to come through, one in the morning that may bring with it a few rain showers, and a stronger one in the evening, behind which a sharper turn to cold air lies. So between the two, we will still have a fairly mild day Friday, but most areas should fail to match their high temperatures of Thursday. Our weekend will see a downward temperature trend but with dry weather. On the way there though, we may see a period of strong and gusty winds Friday night into a portion of Saturday – not as strong as the wind event we recently saw, but may still be enough to take down some tree limbs and weakened trees and lead to a few power outages.

TODAY: Sunny. Highs 45-52 coastal plain, 53-60 interior. Wind variable up to 10 MPH with developing sea breezes.

TONIGHT: Variably cloudy. Lows 36-43 evening then rising slowly overnight. Wind variable up to 10 MPH evening, SW 5-15 MPH overnight.

THURSDAY: Mostly sunny. Highs 61-68 except 53-60 South Coast and 45-52 islands and outer Cape Cod. Wind SW 10-20 MPH, gusts around 25 MPH.

THURSDAY NIGHT: Partly cloudy evening. Mostly cloudy overnight. Lows 46-53. Wind SW 5-15 MPH.

FRIDAY: Mostly cloudy with a possible rain shower early to mid morning. Partly to mostly sunny late morning on. Highs 59-66 except 51-58 South Coast. Wind SW 10-20 MPH shifting to W.

FRIDAY NIGHT: Partly cloudy. Lows 28-35. Wind NW 15-25 MPH, higher gusts.

SATURDAY: Partly sunny. Highs 41-48. Wind N 15-25 MPH, higher gusts.

SATURDAY NIGHT: Mostly clear. Lows 20-27. Wind N 5-15 MPH, higher gusts.

SUNDAY: Mostly sunny. Highs 35-42. Wind NW 5-15 MPH.

DAYS 6-10 (MARCH 15-19)

Temperatures near to below normal, likely coldest early in this period. Watching for unsettled weather around March 16-17 otherwise mostly dry.

DAYS 11-15 (MARCH 20-24)

While the vernal equinox occurs on March 20 our position between cold air in Canada and warmer air in the US Southeast leaves us vulnerable to unsettled weather, which may include frozen precipitation, and temperatures near to below normal for this period heading into late month.

37 thoughts on “Wednesday March 10 2021 Forecast (6:56AM)”

  1. Good morning and thank you TK.

    I have not been present as much lately due to work. I have been tasked with developing a covid vaccine tracking app.
    I presented the prototype yesterday and it was well received. It is quite a project as we are monitoring 9200 elderly clients plus their companions if any and our staff. It includes scedulin
    g, vaccine administration and robust reporting. Do not be surprised if you see our executive director on TV one day soon. Nice to be wanted and keeping busy.

      1. Thank you. Our Executive Director is committed to getting
        ALL of our 9200 or so clients vaccinated! We have already lost 73 of them to covid.

  4. Hey TK, I see a different name as the contest winner than I have known you by in the past. Was this your NWS pen name? Pseudo name? 🙂

  10. Thanks TK.

    Definitely seeing the onshore wind effect today. I’m surprised how much more pronounced it is in SNE than down here in NJ though. Waters are cooler up your way of course, but not all that much.

    Tomorrow’s the really warm day though. I think Boston Logan (and many others) hit 70 tomorrow.

  11. Dave of JP…
    Congrats on the work and best of luck!!
    As far as my name on FB, first and middle is my current setup. This was the name I used on radio during my brief time on the airwaves way back when.

  12. TK, you nailed it for today! 59 when I got in the car in Weston at 12:45 and 50 when I got home 20 minutes later.

    Thanks, as always!

  13. Thank you, TK!

    East wind definitely a factor today. An indicator of early spring as it’s quite a bit cooler here than just a few more miles inland.

    JPD, congratulations on the important work you’re doing.

  16. Joshua and JJ. Thank you for the kind words.
    It has been a challenge for sure, but so far so good.

  18. I was out a while ago returning trash barrels.

    I have to say it is absolutely GORGEOUS out there. MOST comfortable. Yes, there is a LIGHT East wind, but I am far enough from the Water that it has taken the bite out of it!

  20. 1 – Congrats to TK
    2 – Well done JPDave
    3 – Hope this news doesn’t cause JPDave an upset, but spoke to my brother who lives in Denver this morning. Expecting 1 to 2 feet of snow starting tomorrow night. Biggest storm in 9 years.
    Is that the possibility for freezing precip that TK alludes to for the 16th or 17th?

  21. Major gale sweeping across the low countries tomorrow with gusts up to 110 km per hour (~70 mph) along the coast. These storms are more typical in fall and winter, but do occur in the spring as well. Dutch forecasts rarely tell you precisely where the low is (which is too bad), but judging from the wind direction (a westerly) the low is probably situated just east of Scotland tomorrow, so over the North Sea.

    1. Ha. I saw low country ans thought of about Carolina where Macs parents retired. But then being descended from Robert the Bruce (not Bruce line), Scotland works also. Thanks, Joshua

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