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Dec 11-13 MW/Lakes/OV Snow Event? Part III


Chicago Storm

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000

FXUS63 KMKX 101708 AAA

AFDMKX

AREA FORECAST DISCUSSION...UPDATED

NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI

1108 AM CST FRI DEC 10 2010

.UPDATE...NOT MUCH HAS CHANGED IN THE LAST 24 HOURS IN TERMS OF

OVERALL THINKING FOR THE WEEKEND WINTER STORM. THE GENERAL CONSENSUS

OF MODEL TRACKS BRING THE SFC LOW ACROSS SOUTHERN WISCONSIN...WITH A

MIX OF RAIN/SNOW/FREEZING RAIN/SLEET ACROSS MUCH OF THE FORECAST

AREA DURING THE FIRST PART OF THE STORM...THE BEST CHANCE FOR RAIN

SOUTH AND EAST. THERE ARE STILL LARGE ENOUGH DIFFERENCES AMONG

MODELS IN THE SFC TRACK TO KEEP A FEELING OF UNCERTAINTY WITH THIS

STORM. THE 12Z GFS OPERATIONAL RUN HAS SHIFTED SLIGHTLY SOUTH FROM

PREVIOUS RUNS...WITH THE SFC LOW NOW TRACKING ALONG THE WI/IL

BORDER. THE MAJORITY OF THE 00Z GFS ENSEMBLE MEMBERS WERE EVEN

FURTHER SOUTH...KEEPING THE LOW SOUTH OF THE WI BORDER. THE CANADIAN

AND UKMET STILL KEEP THE LOW SOUTH OF THE BORDER...SUGGESTING MOSTLY

SNOW ACROSS SRN WI. MEANWHILE...THE NAM AND ECMWF TRACK THE LOW

RIGHT ACROSS THE FORECAST AREA. THOUGH ON A LARGE SCALE THESE

DIFFERENCES ARE FAIRLY MINOR...THEY DO THROW A PRETTY BIG WRENCH IN

POSSIBLE SNOWFALL AMOUNTS ACROSS SRN WI...ESPECIALLY TOWARD THE

SOUTHEAST.

OVERALL...SEEMS WINTER STORM WARNING CRITERIA SNOWFALL WILL BE MET

ACROSS THE NORTHERN CWA...AND THE WATCH WILL PROBABLY HAVE TO BE

UPGRADED TO A WARNING LATER TODAY. STILL THINKING SUB WARNING

SNOWFALL IN THE SOUTH AND EAST...BUT WILL HAVE TO KEEP A VERY CLOSE

EYE ON THINGS AS THIS STORM DEVELOPS...WITH A LARGER THAN NORMAL

SPREAD IN MODEL TRACKS THIS CLOSE TO THE ARRIVAL OF THE STORM.

Keep in mind that is with the 00z EURO as the 12z is not out yet.. I Strongly suspect the 12z will change that and thus join the GFS/GGEM/RGEM/UK etc and not the NAM. 12z euro starts in less then 15mins.. JMHO

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LOT is going to have their hands full this afternoon/evening. I think WWA headlines are in order but maybe i'm being a weenie.

Yep, like I said last night, this one is a real headache for southern WI/northern IL areas...a ton of people could either see rain/mix and minimal snow or an all out major snowstorm depending on what models end up being correct.

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Yep, like I said last night, this one is a real headache for southern WI/northern IL areas...a ton of people could either see rain/mix and minimal snow or an all out major snowstorm depending on what models end up being correct.

Even the NAM drops 2-6 across the area with the GFS and GEM a bit more. Unless the Euro goes north of the NAM, i think we see a WWA either this afternoon or overnight, the combination of ZR, snow and quickly falling temps/flash freeze should warrant one at least across the northern tier or two of counties.

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Has anyone looked into the wind threat with this, I dont know much about forecasting wind with inversions and all that jazz. Hoosier, you seem to do a great job predicting wind events, whats your take? I just noticed that the gfs shows sustatined 10m winds of 31 mph on Sunday-Monday. With the 850 windspeeds at or above 50-70kts, what kind of gust may we be looking at?

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Has anyone looked into the wind threat with this, I dont know much about forecasting wind with inversions and all that jazz. Hoosier, you seem to do a great job predicting wind events, whats your take? I just noticed that the gfs shows sustatined 10m winds of 31 mph on Sunday-Monday. With the 850 windspeeds at or above 50-70kts, what kind of gust may we be looking at?

You have no location listed.

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If the GFS/GEM/Ukie/Nogaps/RGEM end up right with a ESE trend, your reputation is not on the line.

I read your blog and your a blessing to this community. I just want to get that out there, if I am totally off that is fine and I apologize for this assertion. You are pretty much our teacher here and well respected, exp after the way you handled yourself yesterday.

with that said I hope the Jet can dig this thing south enough for me to get in the deformation zone, so I hope in this case you are wrong, carry on :)

What he (Friv) said. I just recently registered on this site, but I've learned a lot from your posts on this storm so far. Thank you very much for your contributions. I also live in STL, so I am hoping for a more sourthern solution :thumbsup:

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