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Ah, New England: One day it's 70, the next day, snowflakes come down
By adamg on Mon, 01/13/2020 - 9:06am
Yes, there was a touch of snow in the air this morning, especially along the South Shore. Aaron Perry at NBC Boston explains why, although, to be honest, if you don't have a degree in meteorology, you might not have a clue what he wrote. But here's a radar image of the flurries.
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ha
70's to snow within ~15 hours has to be the most new england thing i've experienced in a long time.
translation
I'm no meteorologist, but a bit of a weather nerd. Anyone who knows more can correct my mistakes below. :)
1) -8°C to -11°C layer at 950-960mb layer
Some really freaking cold air not that far above.
2) Ocean waters in the low 40s
Source of moisture.
3) Steep low-level lapse rates
Rapid change in temperature with change in altitude (see #1).
4) Salt nucleation coupled with ESE fetch
a) Moisture has to condense onto something to form precipitation. In this case, salt.
b) Wind sending moisture (see #2) in our direction.
Layman's translation
Ocean-effect snow.
The same as lake-effect snow, but...you know, the ocean.
No
My snow was from The Great Blue Hill.
Mattapan Square.
That's about 15 F.
Cold, but not at the "really freaking" point yet. At least for here :-)
true dat
My relative measures of temperature get all screwed up when we have a couple of days in the 70s in January. :)
"I'm no meteorologist, but..."
Could've fooled me, I gleaned more from your comment than most local tv weather forecasts.
Don't be so hard yourself.