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Jan 9-10th snow threat. Disco/OBS


dmc76

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STEADIER LIGHT RAIN WILL LIKELY BE EXITING TO THE NORTHEAST AT  

THE START OF THE PERIOD AS MID/UPPER LEVEL TROUGH PUSHES ACROSS  

THE GREAT LAKES. WEAK/BROAD ASCENT WILL STILL BE PRESENT EARLY  

ON...WITH EITHER SCATTERED LIGHT RAIN OR DRIZZLE POSSIBLE. ITS  

APPEARING THAT CONDITIONS MAY DRY OUT FOR A PERIOD FRIDAY NIGHT  

INTO SATURDAY MORNING AND SO DID REDUCE POPS DURING THIS  

TIME...BUT DID LEAVE SLIGHT CHANCE/LOW CHANCE WORDING. THIS WILL  

BE OCCURRING AS ANOTHER SYSTEM TAKES SHAPE ACROSS THE SOUTHERN  

PLAINS...WITH GUIDANCE STILL STRUGGLING A BIT WITH THE OVERALL  

EVOLUTION OF THIS SYSTEM INTO THE WEEKEND. VARYING SOLUTIONS ON A  

CLOSED OR OPEN WAVE AND THE TIMING OF THIS...MAKE FOR COMPLICATED  

MID/UPPER LEVELS. THESE DIFFERENCES WILL PLAY OUT WITH THE ARRIVAL  

OF THE NEXT BATCH OF PRECIP AND THE PRECIP TYPE. AT THIS  

TIME...ITS STILL APPEARING THAT RAIN WILL CHANGE TO ALL SNOW  

SATURDAY INTO SATURDAY NIGHT...WITH THIS TRANSITION LIKELY  

OCCURRING SLIGHTLY EARLIER THAN PREVIOUSLY THOUGHT. RAIN WILL  

LIKELY BE FINISHING TO TRANSITION OVER TO ALL SNOW LATE IN THE DAY  

AND EARLY EVENING SATURDAY WITH ALL SNOW THEN EXPECTED FOR ALL  

AREAS LATER THAT EVENING. CONFIDENCE IS STILL ON THE LOWER SIDE  

WITH EXACT AMOUNTS ACROSS THE AREA...BUT CONFIDENCE IS GROWING FOR  

SEVERAL INCHES OF ACCUMULATION OVER MOST OF THE CWA. WHERE IT WILL  

BE COLD ENOUGH TO SNOW FORCING/PRECIP WILL BE LACKING AND WHERE  

THE BETTER FORCING WILL RESIDE...OVER NORTHEAST/EAST CENTRAL  

ILLINOIS AND NORTHWEST INDIANA...THERMAL PROFILES WILL BE LESS  

CONDUCIVE FOR BETTER ACCUMULATING SNOW. HOWEVER...BY THE TIME ALL  

SNOW IS EXPECTED...SUFFICIENT FORCING SHOULD STILL BE IN PLACE FOR  

NORTHEAST/EAST CENTRAL ILLINOIS TO PROVIDE SOME STEADY SNOW  

SATURDAY NIGHT BEFORE IT EXITS. HAVE INCREASED POPS/QPF/SNOW FOR  

SATURDAY INTO SATURDAY NIGHT AND AT THIS TIME AM FORECAST ONE TO  

THREE INCHES FOR MOST OF THE CWA WITH SOME AREAS LIKELY OBSERVING  

TOTALS MORE IN THE TWO TO FOUR INCH RANGE...OVER EAST CENTRAL  

ILLINOIS AND NORTHWEST INDIANA. WILL NEED TO CONTINUE TO MONITOR  

THIS PERIOD AND THE POTENTIAL FOR HIGHER SNOWFALL  

AMOUNTS...ESPECIALLY IF THE EARLIER COLD TREND PERSISTS.  

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Last four runs of the NAM, trends with both waves. Maybe I'm talking out my you know what but with the nrn wave trending to a more neutral/little further south look, the srn stream wave could slow down enough to have a better chance of the nrn wave catching it.

 

attachicon.gifoutput_mLaTMl.gif

 

 

Northern wave did dig a bit more on the 18z GFS compared to 12z.  :weenie:

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They siding with the EURO then?

 

It definitely doesn't sound like the NAM.

 

acc10_1snowmw.png

 

Well if the NAM didn't do its typical thing of putting holes in the precip. shield, their forecast would work. Follow the western line of the snowfall on this map and most of Western MI would fall withing the 2 to 4 inch range. From what I've seen, most of the models still have us in the 2 to 4 inch range, so I think their call is good. The NAM is on the lower side of things, with the EURO giving us 4 to 5 inches.

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Lol Canada, who cares

The only cool posters from there are missing anyways.

I know it's virtually impossible, but. Imagine flying out to Whistler on a ski trip and oddly enough, all the snow was in the valley and the mountain was bare.

Starting to get it yet?

It doesn't matter what we want anyhow, I can't will the storm away from you.

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I'll take the 12z GEM please lol.  All other models deliver a dense cirrus canopy here lolz.  

 

We need a broad spread the wealth storm system.  These nail biters (especially in a season like this) can be frustrating for those who don't get to participate.  Hopefully Feb brings more widespread snows across the board.

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I'll take the 12z GEM please lol.  All other models deliver a dense cirrus canopy here lolz.  

 

We need a broad spread the wealth storm system 1999 Blizzard redux. These nail biters (especially in a season like this) can be frustrating for those who don't get to participate.  Hopefully Feb brings more widespread snows across the board.

 

fyp.

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Got a chance to look at BUFKIT...despite the marginal temps here, nice zone of lift with it intersecting the DGZ so could have some nice flake size.  Even though diurnal effects are near the minimum at this point in the year, I also like that the bulk of this is coming in after dark, assuming that timing holds.  It's already a marginal setup and every fraction of a degree counts, especially around here given some marine influence, so it would be nice to take any diurnal contribution off the table. 

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Looks like you should be at freezing by 60 hour Hoosier on the 12km NAM. 4km NAM has you at 33° at that same time. As long as those winds aren't blowing off the core of 40° water, I think you'll be fine with N winds and getting snow.

 

nam_2016010718_060_41.43--87.35.png

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