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December 13-14th Winter Storm


Chicago Storm

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Agree with you for the most part. I think ground zero for the lake enhancement will likely end up in the Burlington area, although we are just nitpicking when we get to that fine of a scale. Anywhere from Hamilton to Mississauga looks pretty good for at least 6", and as you said 10" or more is possible. Noticed that EC's forecast for Hamilton is 25-30cm when you include Friday Night, Saturday, and Saturday Night. Same goes for Southern Halton(Burlington/Oakville) sub-region as well. I work tomorrow, but will hopefully be able to do some shooting before and after work(maybe on break as well ;) ).

 

EDIT: 0z 4km NAM valid 12am Sunday.

 

ptot29.gif

 

NAM would seem to agree with placing the heaviest snow towards Burlington. I still have the EURO in the back of my head which is more aggressive with the winds veering so I give it a bit of weight.

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NAM would seem to agree with placing the heaviest snow towards Burlington. I still have the EURO in the back of my head which is more aggressive with the winds veering so I give it a bit of weight.

Either way, no doubt one of the better lake enhancement potentials I've seen in a while for the west end of the Lake. 

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Either way, no doubt one of the better lake enhancement potentials I've seen in a while for the west end of the Lake. 

 

There were some interesting meso-lows last year, including the one on February 16th that dropped over 5" at Pearson. But for the most part they seemed to focus from Toronto and east. Last good enhancement event that pops to my mind that included Hamilton was GHD 2011.

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There were some interesting meso-lows last year, including the one on February 16th that dropped over 5" at Pearson. But for the most part they seemed to focus from Toronto and east. Last good enhancement event that pops to my mind that included Hamilton was GHD 2011.

Yup, GHD was pretty good IMBY. I work at a fruit basket catering service(Edible Arrangements). Wonder how the deliveries will go tomorrow. Should be interesting. The City of Hamilton is usually pretty good with snow removal on main roads. Doesn't help much considering 90% of Saturday deliveries are to residential locations though. 

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NAM would seem to agree with placing the heaviest snow towards Burlington. I still have the EURO in the back of my head which is more aggressive with the winds veering so I give it a bit of weight.

0z hrrr seems to be veering the flow much faster then the 4km nam. Band already shifting towards the islands/lake shore by 15z.
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good update from LOT...

 

 

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
858 PM CST FRI DEC 13 2013

.DISCUSSION...
830 PM CST

NO BIG UPDATES TO GOING FORECAST WITH ALSO NO CHANGES TO CURRENT
HEADLINES IN PLACE.

LONGWAVE TROUGH CONTINUES TO SHIFT EAST THROUGH THE CENTRAL
CONUS...WITH SEVERAL LEAD WAVES LIFTING NORTHEAST OUT AHEAD OF IT.
ASSOCIATED FORCING AS WELL AS A GOOD WAA PUSH ALLOWED FOR LIGHT TO
MODERATE SNOW TO QUICKLY MOVE INTO AREAS SOUTH OF I-80 EARLY THIS
EVENING. HIGH AMOUNTS OF MOISTURE WERE PRESENT ON THE 00Z ILX
RAOB...WITH 0.74 INCH PWAT AND 4G/KG MIXING RATIO AT 700MB.
LOW/MID LEVEL CONVERGENCE OWING TO MID/LOW LEVEL BAROCLINIC ZONE
STRETCHED ACROSS NORTH CENTRAL ILLINOIS HAS ALSO AIDED IN THE
DEVELOPMENT OF SEVERAL SMALLER SCALE FEATURES OVER THE LAST HOUR.
THE VISIBILITY HAS GENERALLY STAYED IN THE 1-3SM RANGE...WHILE
FALLING UNDER ONE MILE IN THESE SMALLER HEAVIER BANDS. ALTHOUGH
THESE SMALLER FEATURES WILL LIKELY REMAIN OVER THE NEXT SEVERAL
HOURS...THEY HAVE REMAINED TRANSIENT WITH LOCATIONS ONLY OBSERVING
BRIEF PERIODS OF THIS HEAVIER SNOW.

EXPECT THIS LIGHT TO MODERATE SNOW TO SLOWLY LIFT NORTH WITH THE
I-88 CORRIDOR LIKELY OBSERVING SNOWFALL BY THE 930 PM CST TIME
FRAME. ALTHOUGH STRONGEST WAA APPEARS TO SHIFT TO THE EAST OF THE
CWA OVER THE NEXT SEVERAL HOURS...BROAD SCALE LIFT AS WELL AS
INCREASE IN LOW LEVEL FRONTOGENESIS IS EXPECTED TO HELP PERSIST
LIGHT/MODERATE SNOW AND EVEN PROVIDE BRIEF PERIODS OF HEAVIER
SNOW. THE STRONGEST MESOSCALE FORCING WILL PERSIST TONIGHT AND
REMAIN IN THE ADVISORY AND WARNING AREAS TONIGHT INTO SATURDAY
MORNING. HAD DEBATED ADDING LIVINGSTON/KANKAKEE/LAKE IN/PORTER
COUNTY IN THE WARNING...WITH THIS ANTICIPATED STRONGER FORCING.
ALTHOUGH...WITH ONLY AN ADDITIONAL INCH OR TWO TO THE GOING
TOTALS...HAVE DECIDED TO LEAVE THE ADVISORY GOING AND INSTEAD
INCREASE THE SNOW RANGE TO 4-7 INCHES. REST OF THE SNOW TOTALS IN
THE HEADLINES STILL APPEAR TO BE ON TRACK...WITH 5 TO 8 INCHES
STILL LIKELY IN THE WARNING AREA.

CONTINUE TO MONITOR A SEPARATE AREA OF DEVELOPING SNOW ACROSS
SOUTHERN WISCONSIN AND FAR NORTHERN ILLINOIS. OUTSIDE OF THE LAKE
EFFECT/ENHANCEMENT EXPECTED ACROSS THIS AREA...LATEST GUIDANCE
CONTINUES TO INDICATE ANOTHER AREA OF BETTER FRONTOGENITICAL
FORCING ACROSS SOUTHERN WISCONSIN. THIS FORCING COULD ACT TO
SLIGHTLY ENHANCE TOTALS MORE TOWARDS THE ILLINOIS/WISCONSIN
BORDER...WITH MAYBE MORE 1-3 INCHES COULD BE OBSERVED BY TOMORROW
MORNING. LAKE EFFECT/ENHANCEMENT FOR FAR NORTHEAST ILLINOIS HAS
SHOWN INCREASING TRENDS WITH LATEST GUIDANCE. ALTHOUGH NOT OVERLY
LARGE...THIS WAS ENOUGH TO INCREASE SNOW TOTALS SLIGHTLY. LOW
LEVEL CONVERGENCE INCREASES TOWARDS EARLY SATURDAY MORNING...AND
POSSIBLY LINGERS INTO SATURDAY AFTERNOON AS BOUNDARY LAYER FLOW
SLOWLY SHIFTS. WITH THIS POSSIBLY PROVIDING AN EXTENDED PERIOD OF
LIGHT SNOW...HAVE INCREASED SNOW TOTALS MORE TOWARDS 1-3 IN LAKE
IL...BUT HAVE STILL LEFT OUT OF THE ADVISORY AT THIS TIME.
ALTHOUGH AN ISOLATED 4 INCH REPORT CANNOT BE RULED OUT IN THIS
AREA...WAS NOT ENOUGH TO INCLUDE IN THE HEADLINE. ONCE AGAIN...THE
EXTENDED NATURE OF THIS LIGHT LAKE EFFECT SNOW COULD WARRANT
HIGHER TOTALS IN LAKE COUNTY IL AND POSSIBLY HEADLINE CHANGES
SATURDAY MORNING.

RODRIGUEZ
 

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That's a new take. What's the hrrr's skill when it comes to LES? I've been fairly impressed with it on the synoptic scale over the past couple of years.

Latest RGREM (still updating) so far seems to be supporting this. Starts the band off around Hamilton/Oakville, then shifts it towards Toronto.

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That's a new take. What's the hrrr's skill when it comes to LES? I've been fairly impressed with it on the synoptic scale over the past couple of years.

Has been pretty good this year for GB/huron banding... but it was overdone on the dec 9-10th event off lake ontario. Showed too much ESE enhancement when compared to reality.

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Latest RGREM (still updating) so far seems to be supporting this. Starts the band off around Hamilton/Oakville, then shifts it towards Toronto.

Was just checking EC Vizaweb for the 0z GEM-Reg, whats your source? 

18z had best lake enhancement in the Hamilton/Burlington areas. Will be interesting to watch this unfold.

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I just saw the RGEM and it didn't look to me like it made much of a run at Toronto.

Wxbell maps would agree. Keeps the hamilton/grimsby/oakville enhancement all the way through. The defo banding looks pretty solid though, so the rest of the GTA still does fairly well(4-6 using a 15:1 mean ratio).

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