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December 20-22 Winter Storm (Blizzard?) Potential


Hoosier

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Here I am trying to figure out what to do with this series of mixed precip events in Maine, and almost missed the weenie solutions for you guys.

I took a peek at the GFS cross sections right around 06z Thursday. Nice little fgen signal about 50 miles W of MLI at the surface. This would probably put the line from CSQ-ALO-MSN in the best snow. I mean that frame alone has great lift through the snow growth zones with some -EPV above it. Really good signal for banding.

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ensemble members continue to increase in strength...it's looking pretty likely the region will be facing a high impact event.

some offices putting out SWS's...no problem IMO with it's proximity to the holidays and impact on travel plans via airlines and east/west highways regionally...also, the impacted areas haven't seen a system with these (modeled) capabilities in nearly 22 months...

cautiously warning of potentials is a safe play ATM

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Locally, the TV/Radio mets are giving a track from just to the west of Chcago, to through NW IN and SW MI. My guess would be a compromise track, bringing the low to just S of Chicago, which will mean mainly rain for us, with a bit of snow on the backside, I should think. They do show a farther SE track which is described as an "outlier" bringing us all snow, starting Thursday afternoon. I doubt that scenario very much.

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12z NAM a step in the right direction(southeastward), but it's still too far northwest for even east-central Iowa. It would drop the heavy snow band from sw to ne IA while dropping rain southeast of CR to Dubuque all Wednesday night.

Edit: I just noticed the HPC seems to be going with a farther nw track as they have the best snow band from sw to ne IA. That is definitely more in line with the American models vs the Euro that all the nws offices seem to be siding with.

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12z NAM a step in the right direction(southeastward), but it's still too far northwest for even east-central Iowa. It would drop the heavy snow band from sw to ne IA while dropping rain southeast of CR to Dubuque all Wednesday night.

If the NAM and GFS both start to move toward the Euro, I will continue clinging to a thread of hope for SW Michigan.

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