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January 12-14 Potential Winter Weather Event


Hoosier

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Put up the $$$. Falcons win in a good game.

12z ECMWF is a pretty much a mixy DAB nonevent.

 

LOL.. Just trolling a little but I wouldn't call it a non-event yet.

 

  Yeah should be an awesome game.  Not sure who I'm rooting for if the Packers win.  Failcons don't scare anybody so if they somehow win our ticket is punched to the SB.  Would love to end the Hags season at Lambeau.   If Pack loses Sat night I'll be on the Russel Wilson bandwagon.   Dude has more ice veins in his trunk than matty ice does in his whole body.

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LOT

 

THE MODELS CONTINUE TO RACE
SHORT WAVE ENERGY THROUGH THE TROUGH BEFORE EJECTING IT OUT THE
CENTRAL MISSISSIPPI VALLEY. A STRONG BAROCLINIC ZONE WILL LOOKS TO
BECOME DRAPED FROM SOUTHWEST TO NORTHEAST RIGHT ACROSS MY CWA. THIS
LOOKS TO LEAD TO THE SET UP OF A BAND OF STRONG MID LEVEL
FRONTOGENESIS ACROSS MY SOUTHEASTERN CWA AS THE MID LEVEL
DISTURBANCES INTERACT WITH THE SURFACE COLD FRONT. THINGS WILL
BECOME VERY TRICKY ACROSS THE AREA SATURDAY NIGHT INTO EARLY SUNDAY
MORNING AS IT APPEARS THIS BAND OF FRONTOGENESIS WILL LEAD TO A GOOD
BAND OF PRECIPITATION ACROSS AT LEAST PORTIONS OF MY AREA. AS THE
STRONG COLD FRONT MOVES ACROSS THE AREA IT IS VERY POSSIBLE THAT
THIS COULD SET UP FAVORABLE CONDITIONS FOR A MIX OF SLEET AND EVEN
FREEZING RAIN...MAINLY ACROSS MY NORTHWEST INDIANA COUNTIES AND MY
EAST CENTRAL ILLINOIS COUNTIES. FARTHER TO THE NORTHWEST...INCLUDING
CHICAGO IT APPEARS THAT IT MAY GET COLD ENOUGH THROUGH THE COLUMN TO
SUPPORT MAINLY SNOW. TYPICALLY STRONG BAROCLINIC ZONES SUCH AS THE
ONE ADVERTISED PRODUCE SOME NARROW BANDS OF MODERATE TO HEAVY QPF. SO
THE OVERALL AREAS EFFECTED SIGNIFICANTLY FROM THIS ACTIVITY MAY BE
SMALL IN AREAL COVERAGE.

BECAUSE OF THIS FACT...AND THE FACT TEMPERATURES WILL PLAY A MAJOR
ROLE...THERE IS STILL A GOOD AMOUNT OF UNCERTAINTY WITH HOW THIS
WILL EVENT WILL UNFOLD. HOWEVER...THERE IS SOME VERY GOOD AGREEMENT
AMONG THE GUIDANCE THAT THIS EVENT WILL AFFECT ONLY ABOUT THE
SOUTHEAST 2/3RDS TO 3/4 OF MY CWA...WITH SOME SNOW IN CHICAGO...AND
RAIN AND POSSIBLY SOME FREEZING RAIN TO THE SOUTHEAST OF CHICAGO.
THE MAIN QUESTION MARK IS HOW FAST WILL THE COLD TEMPERATURES
ARRIVE. TYPICALLY COLD ARCTIC AIR-MASSES DROP SOUTH AND EASTWARD
FAIRLY EFFECTIVELY AND UNDERCUT THE WARMER TEMPS ALOFT. THIS WILL
NEED TO BE WATCHED AS WE GET CLOSER TO THE AREA.       
 

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CIPS analogs for 12z GFS:

Mean snowfall:

http://www.eas.slu.edu/CIPS/ANALOG/COLD/F060/MV_060/COOPmeangfs212F060.png

2" snowfall prob

http://www.eas.slu.edu/CIPS/ANALOG/COLD/F060/MV_060/COOP2percgfs212F060.png

Freezing rain prob:

http://www.eas.slu.edu/CIPS/ANALOG/COLD/F060/MV_060/FZRApercgfs212F060.png

Looking through the thumbnails, a decent amount have snow and the ones that do generally have a tight gradient like the 18z NAM showed.I think the biggest worry outside of the ORD futility streak is the very high probability of frz rain. Although the top ground layer and roads being warm from tomorrow's at least near record temps would hopefully have a minimizing effect on that potential. And then the possibility of sleet in between the primarily snow and primarily frzra zones, if it occurs that way.

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I am about to scream....AGAIN.

 

It's better to be on the northern edge of the heaviest precip. this many hours out... imo.

 

SWS just issued here:

 

413 PM CST THU JAN 10 2013 /513 PM EST THU JAN 10 2013/...WINTER MIX POSSIBLE ACROSS THE AREA SATURDAY NIGHT INTO EARLY SUNDAY...A STRONG COLD FRONT IS EXPECTED TO MOVE ACROSS THE AREA DURING THEDAY ON SATURDAY. SEVERAL MID LEVEL DISTURBANCES ARE EXPECTED TOINTERACT WITH THIS FRONT...LIKELY LEADING TO THE DEVELOPMENT OF ABAND OF PRECIPITATION ACROSS PORTIONS OF THE AREA SATURDAY NIGHT.COLD SUBFREEZING AIR NEAR THE SURFACE IS EXPECTED TO MOVE INACROSS THE REGION BEHIND THIS COLD FRONT...AND THIS COULD UNDERCUTWARMER TEMPERATURES ALOFT LEADING TO A MIX OF SNOW...SLEET ANDFREEZING RAIN ACROSS PORTIONS OF THE AREA. UNCERTAINTY REMAINSHIGH WITH THE SPECIFICS OF THIS PRECIPITATION EVENT. HOWEVER...ATTHIS TIME IT APPEARS THE MAIN THREAT FOR FREEZING RAIN AND SLEETWILL REMAIN TO THE EAST OF INTERSTATE 57...WITH MAINLY SNOW ANDSLEET EXPECTED TO THE WEST. SOME ACCUMULATION OF SNOW AND ICE ISPOSSIBLE WITH THIS SYSTEM. IF TRAVEL IS PLANNED ACROSS THE AREASATURDAY NIGHT OR EARLY ON SUNDAY...STAY TUNED TO THE LATESTWEATHER FORECASTS.

 

 

Edit: My forecast: 60% chance of snow Saturday night low 23°, 20% chance on Sunday high 24°.

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It's better to be on the northern edge of the heaviest precip. this many hours out... imo.

SWS just issued here:

Edit: My forecast: 60% chance of snow Saturday night low 23°, 20% chance on Sunday high 24°.

Yeah, I haven't seen that work out too well around here. Once it starts heading a certain direction, it doesn't seem to stop.

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12z GFS even less impressive than the unimpressive 6z GFS

 

 

the 1/16-17 clipper will bring more snow than this turd

 

 

lol leave it to the 18z NAM. 

 

attachicon.gifUSA_ASNOWIPER_sfc_075.gif

 

It's looking like this turd will send some snow up the poop chute of some futility zones. Yes, I know it's the NAM, but someone around Chicagoland is going to have some fun, even if it involves sleet.

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It's looking like this turd will send some snow up the poop chute of some futility zones. Yes, I know it's the NAM, but someone around Chicagoland is going to have some fun, even if it involves sleet.

 

ORD might measure the sleet and chalk the accumulation up as snow! :lmao:

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That is actually how it is done. Sleet always goes on the seasonal snowfall totals etc.

 

...Well I learned something new today! :)

 

Makes sense to clump the frozen precipitation together as one.

 

0z NAM not quite as wet, about in the same position with westward extent.

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00z NAM has like .4 as sleet here. The warm layer is higher than I'm used to seeing...it's like at the 750-700 mb level with everything under that below freezing.

It has me on the other end getting less than an inch of snow... while the GFS has precip. further north and we should be in the snow band, but instead it is sleet. Trends die hard, don't they?

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