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January 3-6th Winter Storm


Chicago Storm

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I see hints of much stronger development showing up on the GFS 06z and projecting the RGEM forward ... expect the southern low to run into a wall of extreme cold that will force the track south of BNA then north-northeast, with those uppers and the lakes open, this could turn into a monster blizzard, not quite the same pattern as 78 but a lot worse than these early maps are showing. Something like a 970 mb low over central Lake Erie tracking north northeast, 40-50 mph winds over MI into w OH by Sunday afternoon and evening. This could be an extremely dangerous situation for the entire region and in particular south end of Lake Michigan should be prepared for extreme conditions, as strong northerly winds bring heavy snow through much of IN. Bet there won't be any real issues about rain or snow in KY either, this thing will have so much cold air surrounding it when it finally gets the signal to move that it will rapidly develop a coastal secondary moving up the Hudson valley and cut off any warm advection. Just looking at the current situation, can't see much organized warm advection over all this snow and with the frigid air over the northeast locked in by a Quebec high that can't really move, most likely scenario is a very rapid PV transfer south. The SK low looks like it has no clue where to go and will probably just end up dying out over northern ON Saturday as the TX low energizes.

 

Expect some much different looking model runs to start appearing later today. With this development scenario and the open lakes, snowfalls of 20-30 inches are possible in lake enhancement zones and 10-20 inches more generally. We may be about to witness a historic storm with almost unprecedented wind chill and blizzard severity measurements. With the occlusion to the coastal secondary areas such as Toronto could also see very heavy snow as cold southeast winds race into the developing centre.

 

The football game in Green Bay should probably be moved over to MSP so they can play it indoors and they could do a double-header weekend in IND to save the Chargers from freezing to death in CIN. But I imagine we will be treated to a weekend of arctic football such as we are quite familiar with in Canada.

Environment Canada still seems underdone with the cold, with regard to with their temperature forecast for Tuesday, calling for a high of -8 Celsius in Toronto (19F).

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Uh, not to be a buzzkill, but the differences between the 0Z, 6Z, and 12Z NAM runs look so incredibly small to me.

 

Actually Jay, there were really significant differences early on with the orientation and progression of the PV.   Honestly I thought this was going to be much crazier looking than it turned out.

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Actually Jay, there were really significant differences early on with the orientation and progression of the PV.   Honestly I thought this was going to be much crazier looking than it turned out.

I was looking at the 5h maps at 33 hours when I wrote that, and to me, they looked identical to the 45 hour ones on the 0Z NAM. I don't know. Like you said, not much pre-frontal qpf...looks odd actually.

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INZ021-028>031-035>049-051>057-060>065-067>072-032315-
/O.NEW.KIND.WS.A.0001.140105T0600Z-140106T0600Z/
CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY-
BOONE-TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH-VERMILLION-PARKE-
PUTNAM-HENDRICKS-MARION-HANCOCK-HENRY-VIGO-CLAY-OWEN-MORGAN-
JOHNSON-SHELBY-RUSH-SULLIVAN-GREENE-MONROE-BROWN-BARTHOLOMEW-
DECATUR-KNOX-DAVIESS-MARTIN-LAWRENCE-JACKSON-JENNINGS-
INCLUDING THE CITIES OF...LAFAYETTE...FRANKFORT...KOKOMO...
CRAWFORDSVILLE...ANDERSON...MUNCIE...INDIANAPOLIS...TERRE HAUTE...
SHELBYVILLE...BLOOMINGTON...COLUMBUS...VINCENNES...BEDFORD...
SEYMOUR
1011 AM EST FRI JAN 3 2014

...WINTER STORM WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH
LATE SUNDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A WINTER
STORM WATCH...WHICH IS IN EFFECT FROM LATE SATURDAY NIGHT THROUGH
LATE SUNDAY NIGHT.


* MAIN IMPACT:ROADS MAY BECOME IMPASSABLE DUE TO HEAVY SNOW AND
  DRIFTS...BLOWING SNOW WILL REDUCE VISIBILITY...TRAVEL MAY
  BECOME VERY HAZARDOUS OR IMPOSSIBLE...:

* ACCUMULATIONS: HEAVY SNOW ACCUMULATIONS ARE LIKELY WITH MANY
  RECEIVING OVER A HALF A FOOT.

* TIMING: LATE SATURDAY NIGHT AND SUNDAY.

* OTHER IMPACTS: WINDS WILL INCREASE TO 20 MPH SUNDAY AFTERNOON
  AND EVENING CAUSING CONSIDERABLE BLOWING AND DRIFTING OF SNOW.

* WIND CHILL VALUES: BITTER COLD AIR WILL SPREAD INTO OUR REGION
  SUNDAY AFTERNOON AND EVENING CAUSING WIND CHILLS TO DROP TO 20
  TO 25 BELOW LATE SUNDAY NIGHT. EVEN COLDER TEMPERATURES WILL
  OCCUR MONDAY AND EARLY TUESDAY WITH WIND CHILLS AS LOW AS 30 TO
  40 BELOW.

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