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The night was only like 3 degrees below freezing though, and shouldn't a low dew point help with making snow go away since the water melted will evaporate quicker and also for the snow to subsidize perhaps?
Dewpoint is -1°F here (-18C) and not 1 flake has disappeared. Air temp is 11°F (-9C). Sun is now out so its the sun that will start to evaporate things.
I never seen a snowpack disappear from low dewpoints only.
Dewpoint is -1°F here (-18C) and not 1 flake has disappeared. Air temp is 11°F (-9C). Sun is now out so its the sun that will start to evaporate things.
I never seen a snowpack disappear from low dewpoints only.
But will really 6'C temps with 100% humidity clear snow faster than 6'C temps with say 50% humidity?
In my experience here, Yes. I might not know how to explain the science of it but higher humidity = more moisture in air which helps melt the snow more. Especially with temps in the 40sF. Just like with storms and weather events, Its multiple factors helping. Hard to pinpoint 1 thing.
High dew points mean that the air just above the surface of the snow, which is at or below freezing, will reach 100% humidity. Water vapor will condense and the latent heat released during the process is very high.
Quote:
Originally Posted by Baba_Wethu
The night was only like 3 degrees below freezing though, and shouldn't a low dew point help with making snow go away since the water melted will evaporate quicker and also for the snow to subsidize perhaps?
The temp here is 4.4C with a -0.6C dew point. The streets are filled with puddles. That's because we have hardly any snow left and thus the snow has not capacity to build up to a cold icy heap which takes a long time to melt.
High dew points mean that the air just above the surface of the snow, which is at or below freezing, will reach 100% humidity. Water vapor will condense and the latent heat released during the process is very high.
I'm at Tavelsjö right now (30km inland), it's 7'C in the city, and at the university's station the low was -4'C. I guess the low here could've been a little lower, but still. Also, I was in the city this morning and there wasn't really much melting there either.
It's been a cold week in Edmonton: highest temperature was -11.2°C on Monday; coldest was -32.4°C Thursday morning. Next week there's some relief in sight with temperatures forecast up to 7°C. Meanwhile today was another cold day. Went for a short walk; temperature at the time was about -16°C.
We've had almost continuous very light snow all week. Not heavy enough to shovel so after 7 straight days it just gets packed down: streets and sidewalks are covered.
Main roads are just sanded: not enough snow for plows and too cold for salt.
Come springtime sidewalk dining might be a little more inviting.
Didn't see anyone accepting the invitation.
This one's for Alex: hemiboreal forest of the North Saskatchewan River valley right in the centre of Edmonton.
nice photos of Edmonton; not a city I know much about but it looks nice. Were many others out in -16°C?
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Weird to say in March. Usually disappears next day or so. That's because our normal max is Mid 40s! 
