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Dec 11-13 MW/Lakes/OV Snow Event? Part II


Chicago Storm

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bank it

Must be spitting out some good ratios associated with the northern semi stationary band that sets up along the tightening baroclinic zone. Most models are pretty consistent on showing this feature, but with varying intensities.

Could one take into the equation a Warmer then normal Lake Michigan?

It's not that much warmer than normal for early december, now in the low 40s mid lake with near shore ice build up, the recent cold and wind is knocking it down pretty quick. In the end the only thing the lake will do is keep lakeside areas rain in marginal temp situations, i don't see it having any large scale impacts on how the storm goes down.

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I have read that a lot. What is a 50/50 low? Thanks

a 50/50 low is an area of low pressure located near longitude 50W/latitude 50N (roughly Newfoundland). You're not really seeing one with this setup. But I agree with Powerball that the clipper provides just enough confluence upstream of the mainstorm that prevents it from cutting hard.

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a 50/50 low is an area of low pressure located near longitude 50W/latitude 50N (roughly Newfoundland). You're not really seeing one with this setup. But I agree with Powerball that the clipper provides just enough confluence upstream of the mainstorm that prevents it from cutting hard.

I see it playing a small role. My thinking was that it's not cutting because its not phasing or strengthening early enough to cut too far west. Wouldn't a big storm like this be able go anywehre once it phases and move the low to the north out of the way? I am probably wrong

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Moneyman special.

GFS gives me 0.21 for the clipper and nearly .4 for the 2nd system.

GEM has .25 for the clipper and .2-.25 for the 2nd system.

Looks like a solid 5-7 inches between these two systems.

GFS is giving MSN 0.6" between the systems, which could end up going a very long way since temps look cold during both events. Low 20s for the clipper and upper teens for the snowstorm. The mid-atlantic dreams of thermal profiles like that :snowman:

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I see it playing a small role. My thinking was that it's not cutting because its not phasing or strengthening early enough to cut too far west. Wouldn't a big storm like this be able go anywehre once it phases and move the low to the north out of the way? I am probably wrong

Yes, if anything the west coast is playing a bigger factor this time (we need the northern steram to dig harder and a tad faster).

However, while it's not an actual 50/50 low, its current poisitioning does seem to be part of the reason why the clipperis leaving behind confluence (and thus trying to keep this storm surpressed).

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my optimism is starting to fade..

Each model run seems to have less and less wave interaction and delays it further and further east. It won't take much of a timing or placement change to flip things back but we're not seeing much to indicate that's imminent, so yeah, it isn't looking very good. The good news, less rain and maybe we can get things to shift even more south because the band associated with the northern piece looks pretty healthy as one would expect a frontogenic band along such a nice tightening baroclinic zone would be.

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