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New Years' Weekend Snow Potential


Rainman

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The flatter memo never made it to the ggem

Flatter would not be good for anyone, you need it to be at least a bit meridional to get the cold air drawn into the system and for the cold sector to get precip. All a flat solution would consist of is warm sector precip until it gets into the Northeast when it would eventually phase. 

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GGEM seems a little cooler in some areas. Other than Alek's lakefront palace, looks like most of Chicagoland would maintain some form of wintry precip throughout on this run.

Actually looks like most of the snow stays NW. The 2" line at least on WxBell runs from Keokuk, IA to Mt Geos. Big winner in south central WI and on northeast from there.

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Actually looks like most of the snow stays NW. The 2" line at least on WxBell runs from Keokuk, IA to Mt Geos. Big winner in south central WI and on northeast from there.

 

 

Was thinking more in terms of mixed/ice.  Granted I'm looking at 6 hour increments so can't rule out a very brief warmup in there as the low approaches.

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Looking at the hourly maps, that GGEM run is nasty in terms of ice for a good part of Chicagoland. Temps become iffy but verbatim, most of the precip falls as zr in 2 rounds with a lull in between.

Meteogram lays down about 14mm (0.55") of ZR in Chicago.
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Looks like a classic mid-level qpf slop storm. Thinking somewhere in the range of .4 to .6 liquid starting as pingers before quickly flipping to zr and maybe even plain rain before ending as a slushy inch or so. The WAA period is just too long and robust for this to be a snowstorm for mby. Still by far the most interesting event of the season imby. Wouldn't mind seeing low level cold hang tough to deliver a rare lakefront ice storm but that's rare for a reason.

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Looks like a classic mid-level qpf slop storm. Thinking somewhere in the range of .4 to .6 liquid starting as pingers before quickly flipping to zero and maybe even plain rain before ending as a slushy inch or so. The WAA period is just too long and robust for this to be a snowstorm for mby. Still by far the most interesting event of the season imby. Wouldn't mind seeing low level cold hang tough to deliver a rare lakefront ice storm but that's rare for a reason.

IMO this is rare optimism on your part. And then maybe a clipper train thereafter.

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IMO this is rare optimism on your part. And then maybe a clipper train thereafter.

 

 

The probability of the system directly impacting our area is high and there will be enough remnant cold to avoid an all plain rain pisser but this isn't really screaming snowstorm to me. I haven't even looked at what comes next yet.

 

I do enjoy seeing yet another GFS/Euro battle shaping up and don't mind having the better model show snow for MBY. 

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The 12z GFS is completely different than the 00z.  It holds the southern low back and wave separation with the northern stream is minimal.  A full phase is definitely in play, but the bigger point is probably that the models don't really have a good handle on this yet.  Didn't make a whole lot of difference at the surface, but the potential is obvious.

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The 12z GFS is completely different than the 00z.  It holds the southern low back and wave separation with the northern stream is minimal.  A full phase is definitely in play, but the bigger point is probably that the models don't really have a good handle on this yet.  Didn't make a whole lot of difference at the surface, but the potential is obvious.

Wouldnt the high prevent it from cutting that far NW?

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