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December 20-22 Winter Storm (Blizzard?) Potential


Hoosier

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Thought DMX summed up the large scale features pretty nicely...

IT STILL APPEARS THAT THIS TROUGH WILL

NOT BE FULLY PHASED...AND THAT MOST OF THE ENERGY WILL DIG INTO THE

SOUTHERN STREAM WITH A NORTHERN STREAM WAVE TRAILING SLIGHTLY

BEHIND. AS THE OVERALL SYSTEM MOVES EASTWARD TOWARD THE CENTRAL U.S.

AND IOWA THE COMPLICATED EVOLUTION OF THE TWO INTERTWINED WAVES WILL

HAVE DRAMATIC IMPACTS ON THE DETAILS OF THEIR ASSOCIATED SENSIBLE

WEATHER. THE SOUTHERN STREAM WAVE WILL GENERATE A STRONG SURFACE LOW

PRESSURE CENTER OVER THE SOUTHERN HIGH PLAINS ON TUESDAY NIGHT/EARLY

WEDNESDAY...WHICH WILL SUBSEQUENTLY MOVE EAST NORTHEAST ACROSS

MISSOURI AND ILLINOIS...WITH A LARGE SWATH OF SNOW SPREADING ALONG

THE NORTHWESTERN FLANK OF THE TRACK. HOWEVER THE PHASING

ISSUES...COMBINED WITH THE FACT THAT THE ENTIRE SYSTEM IS STILL WELL

OFFSHORE AND NOT BEING SAMPLED BY THE UPPER AIR NETWORK...ARE

WREAKING HAVOC WITH THE FORECAST OF THE STORM TRACK BEING OUTPUT BY

THE VARIOUS PROGNOSTIC MODELS. A SHIFT OF 50 OR 100 MILES ONE WAY OR

ANOTHER WILL MAKE THE DIFFERENCE BETWEEN THE HEAVIER SNOW SWATH

FALLING ACROSS CENTRAL IOWA...SOUTHEASTERN IOWA...OR NORTHEASTERN

MISSOURI. GIVEN THE INHERENT UNCERTAINTY IN THIS SCENARIO AND POOR

CONSISTENCY AMONG THE MODELS HAVE OPTED TO KEEP THE FORECAST VERY

CLOSE TO PREVIOUS ISSUANCES...

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Yeah MKX's map shows the Lake cutting down on totals while the Euro shows lake areas getting a bit of enhancement.

546887_10151320333931760_946986531_n.png

My guess is they are not ready to buy into the SE trend yet. For now, I'm happy it trended SE because it gives some breathing room in case the seemingly inevitable NW trend rears its ugly head. However, if it continues it would not be very good either.

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Globals always underamp the southern vort. I really don't know why. Pretty evident now this is going to be a fairly big deal for the upper midwest/eastern Plains area.

Nice to finally get a good event into the sub 100hr range. Feels like we've been trying to wrestle in a big fish for the last month. Just when you think you got it you need to let out the slack and let her run lol.

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Probably going to say through GRB. I'm not sure I buy that, but it could definitely cut through Milwaukee, unfortunately for us Chicago and MKE peeps. Clearly this has my attention, and it is going to be one long 72 hour period for many of us.

One 12Z GEFS member had it cut as far west as MKE.

The furthest N/W Euro Member had it cut through Chicago.

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Joplin to South Bend.

Big winner Freeport, IL.

You heard it here first.

Lake enhancement along Lake Michigan in that scenario may mean one of the lakeshore communities in WI is likely the winner, unless the defo band weakens before that. It would be my dream scenario, but I don't like the chances of it happening given the envelope of possible solutions.

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Lake enhancement along Lake Michigan in that scenario may mean one of the lakeshore communities in WI is likely the winner, unless the defo band weakens before that. It would be my dream scenario, but I don't like the chances of it happening given the envelope of possible solutions.

Storm looks legit...people should do well but this won't be a dream scenario for anyone.

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